A furnace burner which is easy to overhaul

Abstract

The utility model discloses a furnace combustor convenient to overhaul belongs to the field of coal -fired boiler, the utility model discloses a furnace and install the direct -current combustor of furnace inner wall, have three layers nested in the furnace direct -current combustor along the furnace bottom vertical independent distribution and be arranged four corner cut circle, top layer and bottom layer direct -current combustor downside all are equipped with separate burn -out air nozzle, the direct -current combustor includes the air inlet pipe, and the air inlet pipe air outlet is equipped with the coal powder separator with the thick and thin separation mouth, and the air inlet pipe is equipped with the guide vane that is in the ladder distribution and extends to the junction of the thick and thin separation mouth of coal powder separator, the coal powder separator includes the guide port of inserting in the air inlet pipe air outlet, and the guide port can be attached with the outer window, and the outer window is nested with the special-shaped shunt frame, and the outer window is inserted with the fixed frame that can be fixed with the furnace wall. The utility model discloses can dismantle each component in the combustor fast, has the advantage that overhauls conveniently.

Description

Technical Field

[0001] This utility model relates to the field of coal-fired boiler technology, and more specifically, to a furnace burner that is easy to maintain. Background Technology

[0002] In the field of industrial boilers and large-scale combustion equipment, the furnace burner is a core component, and its performance directly affects the operating efficiency and stability of the entire equipment.

[0003] Currently, Chinese invention patent CN113217910B discloses a DC burner, which includes: a housing having a panel on its front; a combustion unit including a main air inlet pipe and multiple injection components, each injection component including a nozzle and an ignition system, the nozzles being connected to the main air inlet pipe, and the nozzle outlet and ignition system being disposed on the panel; a rotation drive unit for driving the panel to rotate, including a drive component being kinetically connected to the panel; and a protection unit including a heat insulation component disposed on at least one side of the panel. A boiler structure with a DC burner includes a boiler and the DC burner arranged around the boiler, the panel facing the boiler's furnace, and the heat insulation component disposed between the panel and the boiler and fitting against both the panel and the boiler.

[0004] In actual use, the coal pulverizer is prone to damage, making maintenance difficult and labor-intensive, which prolongs equipment downtime and causes serious economic losses to the company's production and operation. Utility Model Content

[0005] In view of the above-mentioned problems in the existing technology, the purpose of this utility model is to provide a furnace burner that is easy to maintain.

[0006] To solve the above problems, the technical solution adopted by this utility model is as follows: A furnace burner that is easy to maintain includes a furnace and a DC burner installed on the inner wall of the furnace. Three layers of DC burners are nested inside the furnace, which are vertically and independently distributed along the bottom of the furnace and arranged in a tangential pattern at the four corners. The bottom layer and the bottom layer of the DC burners are provided with separate burnout air nozzles on their lower sides. The DC burner includes an air inlet pipe, and a pulverized coal separator with a concentration separation port is provided at the air outlet of the air inlet pipe. The air inlet pipe is provided with a guide plate that is distributed in a stepped manner and extends to the junction of the concentration separation port of the pulverized coal separator. The pulverized coal separator includes a guide port inserted into the air outlet of the air inlet pipe. The guide port can be fitted with an outer window. An irregularly shaped diverter is nested inside the outer window. A fixing frame that can be fixed to the furnace wall is inserted outside the outer window. The irregular-shaped diversion frame includes a horizontal plate, with a light straight rod connected to the upper side of the horizontal plate and two or more thick support rods connected to the lower end of the horizontal plate. The horizontal plate, the light straight rod, and the thick support rods are together fixed to a diversion plate for diversion.

[0007] Furthermore, the concentrated support rod is shorter than the light straight rod.

[0008] Furthermore, the DC burner in the middle layer is arranged in an inverted position.

[0009] Furthermore, the cross-section of the guide plate is a right-angled triangle.

[0010] Furthermore, the diverter plate is made of wear-resistant cast steel.

[0011] Furthermore, the horizontal plate and the straight rod are connected to plug-in blocks, and the inner wall of the outer window is provided with plug-in grooves that match the plug-in blocks.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: The furnace burner's structural design fully considers ease of maintenance. The pulverized coal separator's guide port and outer window are designed to fit snugly together. The outer window is securely connected to the furnace wall via a fixing bracket. Simultaneously, the irregularly shaped diverter frame is connected to the outer window via a unique plug-in structure: the straight rods on the horizontal plate have plug-in blocks, and the inner wall of the outer window has matching plug-in slots. This plug-in connection method allows workers to quickly and easily disassemble various components during maintenance to inspect, repair, or replace damaged parts inside the burner. After maintenance, it can be quickly and accurately reassembled, significantly shortening maintenance time, reducing maintenance difficulty, effectively improving equipment maintainability, minimizing downtime due to maintenance, and ensuring production continuity. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall structure of the DC burner in this utility model; Figure 3 This is a schematic diagram of the DC burner component structure in this utility model; Figure 4 This is a schematic diagram of the overall structure of the irregular-shaped diverter in this utility model.

[0014] In the diagram: 1. Furnace; 2. DC burner; 201. Inlet pipe; 202. Pulverized coal separator; 2021. Flow guide; 2022. Outer window; 2023. Irregularly shaped flow divider; 2024. Fixing frame; 20231. Horizontal plate; 20232. Lean straight rod; 20233. Rich support rod; 20234. Flow divider; 3. Separating burnout air nozzle; 4. Flow guide; 5. Insert block; 6. Insert slot; Detailed Implementation The present invention will be further described below with reference to specific embodiments.

[0015] Example 1 like Figure 1 , 2 As shown in Figures 3 and 4, the furnace burner of this embodiment, which is easy to maintain, includes a furnace 1 and a DC burner 2 installed on the inner wall of the furnace 1. Three layers of DC burners 2 are nested inside the furnace 1 and are vertically and independently distributed along the bottom of the furnace 1. The top and bottom DC burners 2 are provided with separate burnout air nozzles 3 on their lower sides. The three nested layers of direct-flow burners 2 within the furnace 1 are arranged in a tangential pattern at their four corners and vertically distributed independently along the bottom of the furnace 1. This arrangement allows the pulverized coal gas flow to form a strong rotating flame within the furnace 1 after being ejected from the burners. The rotating flame enhances the mixing of pulverized coal and air, ensuring that the pulverized coal particles continuously come into contact with oxygen during rotation, resulting in more complete combustion and improved combustion efficiency. Furthermore, the layered arrangement allows for flexible adjustment of the operating parameters of each layer of burners according to different combustion stages and load requirements. For example, the pulverized coal injection speed and airflow of different layers can be adjusted to adapt to different operating conditions and further optimize the combustion process.

[0016] The separate burnout air nozzles 3, located below the top and bottom DC burners 2, serve to supplement air during combustion. In the initial stage of pulverized coal combustion, combustion relies primarily on the air supplied by the DC burners 2. However, as combustion progresses, some pulverized coal may fail to burn completely due to insufficient oxygen. The separate burnout air nozzles 3 inject an appropriate amount of air in the later stages of combustion, allowing these unburned pulverized coal particles to burn fully in a sufficient oxygen environment, reducing incomplete combustion losses, improving boiler thermal efficiency, and simultaneously reducing emissions of pollutants such as carbon monoxide.

[0017] The DC burner 2 includes an air inlet pipe 201, and a coal powder separator 202 with a thick and thin separation port is provided at the air outlet of the air inlet pipe 201. The air inlet pipe 201 is provided with a guide plate 4 that is distributed in a stepped manner and extends to the junction of the thick and thin separation port of the coal powder separator 202. When the pulverized coal airflow enters through the inlet pipe 201, the guide plate 4 is fixedly welded to the inner wall of the inlet pipe 201, which can change the flow direction and velocity distribution of the airflow. The stepped distribution design allows the airflow to be gradually adjusted during the flow process. The right-angled triangular cross-section can guide the airflow more precisely, so that the pulverized coal forms a reasonable flow state before entering the pulverized coal separator 202, preventing the pulverized coal from forming eddies that could damage the pipe. At the same time, it is also conducive to the separation of concentrated and diluted pulverized coal, creating favorable conditions for subsequent staged combustion.

[0018] The pulverized coal separator 202 includes a guide port 2021 inserted into the air outlet of the air inlet pipe 201. The guide port 2021 can be fitted with an outer window 2022. An irregularly shaped diverter 2023 is nested inside the outer window 2022. A fixing frame 2024 that can be fixed to the outer wall of the furnace 1 is inserted outside the outer window 2022. The guide port 2021 of the pulverized coal separator 202 is inserted into the air outlet of the inlet pipe 201 and is fitted against the outer window 2022. The guide port 2021 guides the pulverized coal airflow into the outer window 2022, which in turn provides a stable channel for further diversion and flow of the pulverized coal airflow. Together, they allow the pulverized coal airflow to smoothly enter the interior of the pulverized coal separator 202 for subsequent concentration-lean separation and combustion processes. The fixing frame 2024 is fixed to the outer wall of the furnace 1 with screws; during maintenance, only the fixing frame 2024 needs to be removed for easy replacement of relevant components.

[0019] The irregular-shaped diversion frame 2023 includes a horizontal plate 20231, a light straight rod 20232 connected to the upper side of the horizontal plate 20231, and two or more thick support rods 20233 connected to the lower end of the horizontal plate 20231. The horizontal plate 20231, the light straight rod 20232 and the thick support rods 20233 are together fixed to a diversion plate 20234 for diversion.

[0020] The unique structure of the irregularly shaped diverter 2023 plays a crucial role in the separation and combustion of pulverized coal. A straight, light-colored rod 20232 is fixedly welded to the upper side of the horizontal plate 20231, while multiple heavy-colored support rods 20233 are fixedly welded to the lower end, all connected to a diverter plate 20234. This allows the pulverized coal to be separated into two streams of light and heavy-colored airflow in a specific ratio when passing through the pulverized coal separator 202. The longer light-colored rod 20232 creates a larger space with the outer window 2022, allowing some of the pulverized coal to form a faster-flowing light-colored pulverized coal airflow under the combined diversion of the guide plate 4 and the diverter plate 20234. The shorter heavy-colored support rods 20233 create a smaller space with the outer window 2022, allowing the other portion of the guided pulverized coal to form a slower-flowing heavy-colored pulverized coal airflow. This concentrated-lean combustion method can make combustion more stable and efficient. The concentrated pulverized coal gas stream can ignite and burn quickly in the early stage of combustion, releasing a large amount of heat, providing an ignition heat source for the depleted pulverized coal gas stream, promoting the combustion of the depleted pulverized coal gas stream, and reducing the generation of pollutants such as nitrogen oxides.

[0021] The thick support rod 20233 is shorter than the light straight rod 20232.

[0022] The middle layer DC burner 2 is arranged in an inverted position.

[0023] The inverted arrangement of the two intermediate-layer direct-current burners provides greater flexibility in adjusting the combustion mode. In actual operation, the arrangement and operation mode of each layer of burners can be flexibly adjusted according to different coal qualities, loads, and combustion conditions. For example, when the coal quality changes or the combustion intensity needs to be adjusted, the operating state of the inverted intermediate-layer burners can be changed, such as adjusting the pulverized coal injection angle and air volume, in coordination with the normally arranged burners in other layers. This allows for fine-tuning of the combustion process, enabling the boiler to better adapt to different operating needs and improving its adaptability and operational flexibility.

[0024] The cross-section of the deflector 4 is a right-angled triangle.

[0025] The 20234 flow divider is made of wear-resistant cast steel.

[0026] The flow divider plate 20234 is made of wear-resistant cast steel ZG40CrMnMoNiRe. During combustion, the flow divider plate 20234 is subjected to the scouring of high-speed pulverized coal airflow and high-temperature environment for extended periods. Ordinary materials are prone to wear and damage. Wear-resistant cast steel, with its high hardness, wear resistance, and high-temperature resistance, effectively resists the scouring of pulverized coal airflow and high-temperature erosion, extending the service life of the flow divider plate 20234, reducing equipment downtime for maintenance due to component damage, and improving equipment reliability and operational stability.

[0027] A plug-in block 5 is connected to the horizontal plate 20231 and the light straight bar 20232, and a plug-in groove 6 matching the plug-in block 5 is provided on the inner wall of the outer window 2022.

[0028] Both the horizontal plate 20231 and the straight rod 20232 are fixedly welded with plug-in blocks 5, which correspond to the plug-in slots 6 matching the inner wall of the outer window 2022. The outer window 2022 is also plugged into the furnace wall 1 via a fixing bracket 2024. This plug-in connection method makes the connection and disassembly of various components more convenient. During maintenance, workers can quickly disassemble relevant components for inspection, repair, or replacement, and then quickly and accurately reassemble them back in their original positions after maintenance, improving the maintainability of the equipment.

Claims

1. A furnace burner that is easy to maintain, comprising a furnace (1) and a direct-flow burner (2) installed on the inner wall of the furnace (1), characterized in that, Three layers of DC burners (2) are nested inside the furnace (1) and are vertically and independently distributed along the bottom of the furnace (1). The top and bottom DC burners (2) are provided with separate burnout air nozzles (3) on the lower side. The DC burner (2) includes an air inlet pipe (201), and a coal powder separator (202) with a thick and thin separation port is provided at the air outlet of the air inlet pipe (201). The air inlet pipe (201) is provided with a guide plate (4) that is distributed in a stepped manner and extends to the junction of the thick and thin separation port of the coal powder separator (202). The pulverized coal separator (202) includes a guide port (2021) inserted into the air outlet of the air inlet pipe (201), the guide port (2021) can be fitted with an outer window (2022), the outer window (2022) is nested with a special-shaped diversion frame (2023), and the outer window (2022) is connected to a fixing frame (2024) that can be fixed to the furnace (1) wall. The irregular-shaped diversion frame (2023) includes a horizontal plate (20231), a light straight rod (20232) is connected to the upper side of the horizontal plate (20231), and two or more thick support rods (20233) are connected to the lower end of the horizontal plate (20231). The horizontal plate (20231), the light straight rod (20232) and the thick support rods (20233) are together fixed with a diversion plate (20234) for diversion.

2. A furnace burner for easy maintenance according to claim 1, characterized in that, The thick support rod (20233) is shorter than the light straight rod (20232).

3. A furnace burner for easy maintenance according to claim 1, characterized in that, The DC burner (2) in the middle layer is arranged in an inverted position.

4. A furnace burner for easy maintenance according to claim 1, characterized in that, The cross-section of the guide plate (4) is a right triangle.

5. A furnace burner for easy maintenance according to claim 1, characterized in that, The diverter plate (20234) is made of wear-resistant cast steel.

6. A furnace burner for easy maintenance according to claim 1, characterized in that, The horizontal plate (20231) and the straight bar (20232) are connected to the plug-in block (5), and the inner wall of the outer window (2022) is provided with a plug-in groove (6) that matches the plug-in block (5).

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