A coal-fired power unit boiler with high thermal efficiency

Abstract

The utility model relates to coal -fired generating set boiler equipment technical field, and disclose a kind of coal -fired generating set boiler with high thermal efficiency, including generating set boiler main body, and the combustion furnace is installed on the generating set boiler main body, and the combustion furnace is connected with secondary air door pipe, and the adjusting assembly is installed on the secondary air door pipe, and the adjusting assembly includes the sealing ring fixed in the secondary air door pipe, sliding slot is opened in the sealing ring, and the sealing plate is slidably connected in the sliding slot, the execution controller is fixed on the combustion furnace outer wall, and the cleaning assembly is installed on the execution controller. The boiler of the utility model can accurately control secondary air flow, ensure the stability of the air power field in the furnace, help the boiler to realize stable combustion, while avoiding the problem of combustion efficiency decline caused by air leakage, improving the thermal efficiency of the boiler, solving the problem of insufficient adjustment accuracy and poor sealing performance of traditional equipment, affecting the operation stability and difficult to improve the thermal efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of coal-fired power generation unit boiler equipment, specifically a coal-fired power generation unit boiler with high thermal efficiency. Background Technology

[0002] During the operation of a coal-fired power generation unit, the boiler, as the core equipment, directly affects the power generation efficiency, energy consumption level, and environmental emission indicators of the entire unit due to its operational stability and thermal efficiency. In recent years, the capacity of coal-fired power units has been increasing and the thermal efficiency of the units has been continuously improving. The healthy operation of the boiler water-cooled walls and superheaters, as well as the quality of heat exchange, determine the boiler thermal efficiency to a certain extent, and also affect the economic efficiency of the unit.

[0003] Currently, in the secondary air damper regulation system of traditional coal-fired power plant boilers, the secondary air flow is difficult to control precisely, resulting in poor stability of the aerodynamic field inside the furnace, affecting the boiler combustion efficiency, and easily causing air leakage, which further disrupts the combustion environment inside the furnace, causing a decrease in combustion efficiency and affecting the stable operation of the unit. In addition, because the secondary air damper actuator is installed close to the combustion furnace, it is in a harsh environment with a lot of dust for a long time. Dust easily accumulates on the surface of the actuator and the internal wiring, which can lead to problems such as short circuits and equipment failures.

[0004] Therefore, we propose a coal-fired power plant boiler with high thermal efficiency to solve the problems mentioned above. Utility Model Content

[0005] The purpose of this utility model is to provide a coal-fired power generation boiler with high thermal efficiency, so as to solve the problems mentioned in the background art, which are that existing boilers are difficult to accurately control the secondary air flow, resulting in poor stability of the aerodynamic field inside the furnace and difficulty in cleaning the dust on the secondary air damper actuator controller. This makes it easy for dust to accumulate on the surface of the controller and the internal wiring, which in turn causes short circuits and equipment failures.

[0006] This utility model provides the following technical solution: a high-efficiency coal-fired power generation boiler, including a power generation boiler body, a combustion furnace installed on the power generation boiler body, a secondary air damper pipe connected to the combustion furnace, an adjustment component installed on the secondary air damper pipe, the adjustment component including a sealing ring fixed inside the secondary air damper pipe, a sliding groove opened in the sealing ring, a sealing plate slidably connected in the sliding groove, an execution controller fixed on the outer wall of the combustion furnace, and a cleaning component installed on the execution controller.

[0007] Preferably, a mounting bracket is fixed on the secondary air damper pipe, a limit plate is fixed on the inner wall of the mounting bracket, a cylinder is fixed on the mounting bracket, a connecting plate is fixed to the output end of the cylinder, and the connecting plate is fixedly connected to the sealing plate.

[0008] Preferably, the sealing plate is slidably connected to the limiting plate, and the sealing plate is slidably connected to the sliding groove.

[0009] Preferably, the cleaning assembly includes a gas storage tank fixed on the combustion furnace, a gas outlet pipe connected to the gas storage tank, a one-way valve installed inside the gas outlet pipe, a suction cylinder connected to one end of the gas outlet pipe, an exhaust pipe connected to one end of the suction cylinder, a two-way valve installed inside the exhaust pipe, a transfer pipe fixed to the side wall of the gas storage tank, the transfer pipe connected to the exhaust pipe, and a nozzle connected to the bottom surface of the transfer pipe.

[0010] Preferably, a spring is fixed to the bottom surface of the suction cylinder, a frustum is fixed to the other end of the spring, a sliding rod is fixed inside the frustum, the sliding rod is coaxial with the spring, the sliding rod is slidably connected to the suction cylinder, a piston is fixed to the top surface of the sliding rod, and the outer wall of the piston slides against the inner wall of the suction cylinder.

[0011] Preferably, a top rod is fixed on the connecting plate, a through hole is provided on the mounting bracket, the top rod is slidably connected to the through hole, and the top rod is coaxially arranged with the frustum and the slide rod.

[0012] This utility model has the following beneficial effects: 1. This boiler can precisely control the secondary air flow, ensuring a stable aerodynamic field within the furnace and facilitating stable combustion. Simultaneously, it effectively reduces NOx emissions to meet environmental protection requirements. In the secondary air damper adjustment stage, air leakage is reduced, preventing a decrease in combustion efficiency due to leakage, thus improving boiler thermal efficiency and ensuring safe and stable unit operation. This solves the problems of insufficient adjustment precision and poor sealing performance in traditional equipment, which affect operational stability and hinder the improvement of thermal efficiency. 2. This boiler can automatically clean the dust from the secondary damper actuator controller, avoiding the risk of short circuits or equipment damage caused by long-term dust accumulation, greatly reducing the probability of actuator failure, thereby improving the reliability of the secondary damper regulation system, and solving the problem that traditional equipment lacks an effective dust removal mechanism and the controller is prone to failure, which indirectly affects the boiler's thermal efficiency and operational stability. 3. The boiler's cleaning process for the actuator controller requires no additional equipment. Its structure, linked to the secondary damper adjustment components, automatically completes dust removal without the need for additional equipment or steps. This further ensures the long-term stable operation of the actuator controller, effectively reducing the risk of secondary damper malfunction due to dust contamination and preventing the impact of adjustment system failures on boiler thermal efficiency. Furthermore, compared to traditional manual cleaning methods, its automatic cleaning function eliminates the need for human intervention, significantly reducing equipment maintenance workload and labor costs. It also avoids the personal safety risks faced by maintenance personnel working at heights, improving the overall safety and economy of the unit's operation. While continuously ensuring stable boiler thermal efficiency, it also considers equipment operational stability and ease of maintenance. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the combustion furnace, secondary air damper, regulating component, and cleaning component of this utility model.

[0015] Figure 3 This is a schematic diagram of the adjustment component and cleaning component of this utility model.

[0016] Figure 4 This is an exploded view of some components of the cleaning assembly of this utility model.

[0017] In the diagram: 1. Main body of generator set boiler; 2. Combustion furnace; 3. Secondary air damper pipe; 4. Adjustment component; 41. Sealing ring; 42. Slide groove; 43. Mounting bracket; 44. Limiting plate; 45. Cylinder; 46. Connecting plate; 47. Sealing plate; 5. Actuator controller; 6. Cleaning component; 61. Gas storage tank; 62. Gas outlet pipe; 63. One-way valve one; 64. Suction cylinder; 65. Exhaust pipe; 66. One-way valve two; 67. Transfer pipe; 68. Nozzle; 69. Spring; 610. Frustum; 611. Slide rod; 612. Piston; 613. Push rod; 614. Through hole. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example 1: This embodiment aims to address the air leakage problem caused by insufficient sealing performance during the adjustment of secondary air dampers in coal-fired power plant boilers, as well as the problems of low accuracy and poor stability of damper opening adjustment, which in turn affect combustion efficiency and pollutant emission control. Please refer to [link / reference needed]. Figure 1 - Figure 4 A high-efficiency coal-fired power generation boiler includes a main body 1, a combustion furnace 2 installed on the main body 1, a secondary air damper pipe 3 connected to the combustion furnace 2, an adjustment component 4 installed on the secondary air damper pipe 3, the adjustment component 4 including a sealing ring 41 fixed inside the secondary air damper pipe 3, a sliding groove 42 opened inside the sealing ring 41, a sealing plate 47 slidably connected inside the sliding groove 42, an installation frame 43 fixed on the secondary air damper pipe 3, a limit plate 44 fixed on the inner wall of the installation frame 43, a cylinder 45 fixed on the installation frame 43, a connecting plate 46 fixed at the output end of the cylinder 45, the connecting plate 46 fixedly connected to the sealing plate 47, the sealing plate 47 slidably connected to the limit plate 44, and the sealing plate 47 slidably connected to the sliding groove 42.

[0020] In this embodiment: during actual operation, the main body of the generator set boiler 1 burns coal through the combustion furnace 2, and the secondary air damper pipe 3 is used to transport secondary air to optimize the aerodynamic field inside the furnace, ensure stable combustion of the boiler and reduce NOx emissions.

[0021] When it is necessary to adjust the opening of the secondary air damper, the cylinder 45 provides driving force, and the output end of the cylinder 45 drives the connecting plate 46 to move. The connecting plate 46 then drives the sealing plate 47 to slide in the groove 42 of the sealing ring 41 in the secondary air damper pipe 3. At the same time, the sealing plate 47 slides along the limiting plate 44. By controlling the sliding distance of the sealing plate 47, the ventilation cross-sectional area of ​​the secondary air damper pipe 3 can be precisely adjusted to achieve precise control of the secondary airflow.

[0022] The sealing ring 41 reduces air leakage in the secondary air damper pipe 3, preventing air leakage from disrupting the aerodynamic field inside the furnace and affecting combustion efficiency. The limiting plate 44 constrains the sliding trajectory of the sealing plate 47, preventing the sealing plate 47 from shifting and causing adjustment failure, further improving the stability of the secondary air damper adjustment. The structural design of this adjustment component 4, in conjunction with the control logic of the split positioner, uses cylinder 45 for driving and precise sliding guidance to solve the problem of secondary air loss control caused by aging of the actuator seal and inaccurate positioning in traditional damper adjustment, providing reliable secondary air adjustment guarantee for stable boiler combustion and environmentally friendly emissions.

[0023] Example 2: This embodiment aims to address the problem that during operation of the secondary damper actuator controller 5, dust accumulation can easily cause short circuits and equipment malfunctions, leading to a decrease in the reliability of the secondary damper regulation system. This embodiment is an improvement upon Embodiment 1. For details, please refer to [link to Embodiment 1]. Figure 1 - Figure 4 An execution controller 5 is fixed to the outer wall of the combustion furnace 2. A cleaning component 6 is installed on the execution controller 5. The cleaning component 6 includes a gas storage tank 61 fixed to the combustion furnace 2. A gas outlet pipe 62 is connected to the gas storage tank 61. A one-way valve 63 is installed inside the gas outlet pipe 62. A suction cylinder 64 is connected to the end of the gas outlet pipe 62. An exhaust pipe 65 is connected to the end of the suction cylinder 64. A two-way valve 66 is installed inside the exhaust pipe 65. A transfer pipe 67 is fixed to the side wall of the gas storage tank 61. The transfer pipe 67 is connected to the exhaust pipe 65. A nozzle 68 is connected to the bottom surface of the transfer pipe 67.

[0024] A spring 69 is fixed to the bottom surface of the suction cylinder 64, and a frustum 610 is fixed to the other end of the spring 69. A slide rod 611 is fixed inside the frustum 610. The slide rod 611 is coaxial with the spring 69 and is slidably connected to the suction cylinder 64. A piston 612 is fixed to the top surface of the slide rod 611, and the outer wall of the piston 612 slides against the inner wall of the suction cylinder 64.

[0025] A push rod 613 is fixed on the connecting plate 46, and a through hole 614 is provided on the mounting bracket 43. The push rod 613 is slidably connected to the through hole 614, and the push rod 613 is coaxially arranged with the frustum 610 and the slide rod 611.

[0026] In this embodiment: During actual operation, the actuator 5 on the outer wall of the combustion furnace 2 is used to monitor and control the operating status of the secondary air damper adjustment component 4, while the cleaning component 6 automatically cleans the area around the actuator 5 where dust easily accumulates.

[0027] When the cylinder 45 in Embodiment 1 drives the connecting plate 46 to move and adjust the sealing plate 47, the push rod 613 fixed on the connecting plate 46 will move synchronously with the connecting plate 46. The push rod 613 slides along the through hole 614 of the mounting bracket 43. Since the frustum 610, the slide rod 611 and the push rod 613 are coaxially arranged, the push rod 613 will abut against the frustum 610 when it rises. As the push rod 613 continues to rise, it will continuously push the frustum 610. After the frustum 610 is subjected to force, it compresses the spring 69 on the bottom surface and drives the slide rod 611 to slide inside the suction cylinder 64. The piston 612 at the top of the slide rod 611 slides against the inner wall of the suction cylinder 64.

[0028] When piston 612 slides upward, a negative pressure is formed in suction cylinder 64. At this time, one-way valve 66 in exhaust pipe 65 is closed and one-way valve 63 in air outlet pipe 62 is opened. The air pre-stored in air tank 61 enters suction cylinder 64 through air outlet pipe 62 to reserve air pressure for subsequent dust cleaning.

[0029] When cylinder 45 drives connecting plate 46 to reset, the thrust of push rod 613 on frustum 610 disappears, spring 69 resets and pushes frustum 610, slide rod 611 and piston 612 downward, increasing the pressure inside suction cylinder 64. At this time, one-way valve 1 63 closes and one-way valve 2 66 opens. Compressed air in suction cylinder 64 is transported to transfer pipe 67 through exhaust pipe 65, and then to nozzle 68 through transfer pipe 67. Nozzle 68 sprays compressed air in a direction onto the surface and surrounding area of ​​actuator controller 5, blowing away the attached dust and preventing long-term dust accumulation from causing short circuits or equipment damage. This effectively solves the equipment failure problem caused by furnace dust leakage and accumulation on site.

[0030] The cleaning component 6, in conjunction with the secondary air damper adjustment component 4, utilizes the air stored in the air tank 61 to automatically clean the actuator 5 without the need for additional external air. This ensures the stability of the cleaning process and prevents external impurities from entering the equipment with the air, further enhancing the reliability of the actuator 5 and reducing the risk of secondary air damper malfunction due to dust failure, thus providing a guarantee for the safe and stable operation of the unit.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A high-efficiency coal-fired power generation boiler, comprising a main body (1) of the power generation boiler, characterized in that: A combustion furnace (2) is installed on the main body (1) of the generator set boiler. A secondary air damper pipe (3) is connected to the combustion furnace (2). An adjustment component (4) is installed on the secondary air damper pipe (3). The adjustment component (4) includes a sealing ring (41) fixed inside the secondary air damper pipe (3). A sliding groove (42) is opened inside the sealing ring (41). A sealing plate (47) is slidably connected inside the sliding groove (42). An execution controller (5) is fixed on the outer wall of the combustion furnace (2). A cleaning component (6) is installed on the execution controller (5).

2. The high thermal efficiency coal-fired power generation boiler according to claim 1, characterized in that: A mounting bracket (43) is fixed on the secondary air damper pipe (3). A limit plate (44) is fixed on the inner wall of the mounting bracket (43). A cylinder (45) is fixed on the mounting bracket (43). A connecting plate (46) is fixed at the output end of the cylinder (45). The connecting plate (46) is fixedly connected to the sealing plate (47).

3. The high thermal efficiency coal-fired power plant boiler according to claim 2, characterized in that: The sealing plate (47) is slidably connected to the limiting plate (44), and the sealing plate (47) is slidably connected to the sliding groove (42).

4. A high-efficiency coal-fired power plant boiler according to claim 3, characterized in that: The cleaning assembly (6) includes a gas storage tank (61) fixed on the combustion furnace (2), a gas outlet pipe (62) connected to the gas storage tank (61), a one-way valve (63) installed in the gas outlet pipe (62), a suction cylinder (64) connected to the end of the gas outlet pipe (62), an exhaust pipe (65) connected to the end of the suction cylinder (64), a one-way valve (66) installed in the exhaust pipe (65), a transfer pipe (67) fixed to the side wall of the gas storage tank (61), the transfer pipe (67) connected to the exhaust pipe (65), and a nozzle (68) connected to the bottom surface of the transfer pipe (67).

5. A high-efficiency coal-fired power plant boiler according to claim 4, characterized in that: A spring (69) is fixed to the bottom surface of the suction cylinder (64), and a frustum (610) is fixed to the other end of the spring (69). A slide rod (611) is fixed inside the frustum (610). The slide rod (611) is coaxially arranged with the spring (69). The slide rod (611) is slidably connected to the suction cylinder (64). A piston (612) is fixed to the top surface of the slide rod (611). The outer wall of the piston (612) slides against the inner wall of the suction cylinder (64).

6. A high-efficiency coal-fired power plant boiler according to claim 5, characterized in that: A top rod (613) is fixed on the connecting plate (46), and a through hole (614) is provided on the mounting bracket (43). The top rod (613) is slidably connected to the through hole (614), and the top rod (613) is coaxially arranged with the frustum (610) and the slide rod (611).

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