Flue dusting structure of waste heat boiler

Abstract

This utility model belongs to the field of boiler flue technology and discloses a waste heat boiler flue cleaning structure. The flue body has an exhaust pipe and an inlet pipe connected to its upper and lower ends, respectively. A protective component is connected to the top of the flue body, and a connecting pipe is fixed to the top of the protective component. A hydraulic cylinder is installed on the top of the connecting pipe, and a cleaning component is connected to the output end of the hydraulic cylinder. The cleaning component is located inside the connecting pipe. A sealing cover is threaded to the bottom of the flue body. The cleaning component is pushed downwards along the connecting pipe into the flue body by the output end of the hydraulic cylinder. The ash hopper, spray pipe, and scraper of the cleaning component can respectively scrape ash, wash, and scrape water from the inner wall of the flue body. Through the coordinated operation of shoveling, spraying, and scraping, the accumulated ash on the inner wall of the flue can be thoroughly and efficiently removed. Compared with traditional single cleaning methods, the cleaning effect is significantly improved, effectively increasing the heat exchange efficiency of the waste heat boiler.

Description

Technical Field

[0001] This utility model belongs to the field of boiler flue technology, specifically the ash removal structure for waste heat boiler flue. Background Technology

[0002] Waste heat boilers are energy recovery devices that use various types of waste heat from industrial production as a heat source to heat water into steam or hot water. Due to incomplete combustion or impurities in the fuel, ash will accumulate on the inner wall of the flue. If this ash is not removed in time, it will cause the flue diameter to narrow, affecting the exhaust, and in severe cases, it will block the flue and cause safety accidents.

[0003] Meanwhile, a waste heat boiler flue dust cleaning device with announcement number 202121428980.7 is disclosed, including a flue pipe, a flue pipe fixedly connected to the front end of the flue pipe, a support column fixedly connected to the upper end of the flue pipe, a flushing mechanism fixedly installed at the upper end of the support column, a drive motor fixedly installed at the lower end of the flue pipe, a dust removal mechanism movably installed inside the flue pipe, and a dust removal mechanism fixedly installed at the front end of the upper part of the flue pipe;

[0004] The aforementioned waste heat boiler flue dust cleaning device lacks protection for components such as the threaded rod and flushing pipe during use. During the flue gas discharge process, dust and impurities easily adhere to the outlet of the threaded rod and flushing pipe, affecting the operation of the equipment. Furthermore, when cleaning the flue gas pipe, dust and flushing water flow into the bottom of the flue gas pipe through the gaps, making it difficult to clean. Long-term accumulation will affect the use of the flue gas pipe.

[0005] Therefore, a waste heat boiler flue ash removal structure is proposed to address the above problems. Utility Model Content

[0006] To address the problems mentioned in the background art, this utility model provides a waste heat boiler flue cleaning structure, which has the advantages of comprehensively and efficiently removing ash accumulated on the inner wall of the flue through the coordinated operation of multiple methods such as shoveling, spraying, and scraping, and the protection components provided can protect the cleaning components and improve their service life.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a waste heat boiler flue cleaning structure, including a flue body, with an exhaust pipe and an inlet pipe respectively connected to the upper and lower ends of the flue body, a protective component connected to the top of the flue body, a connecting pipe fixed to the top of the protective component, a hydraulic cylinder installed at the top of the connecting pipe, a cleaning component connected to the output end of the hydraulic cylinder, the cleaning component being disposed inside the connecting pipe, and a sealing cover plate threaded to the bottom of the flue body.

[0008] Preferably, the protective assembly includes a connecting cover, a servo motor, a lead screw, a moving block, and a heat insulation baffle. The connecting cover is disposed between the connecting pipe and the flue body. The servo motor is installed on one side of the connecting cover, and the output shaft of the servo motor is connected to the lead screw. The lead screw is disposed inside the connecting cover. The heat insulation baffles are symmetrically arranged, and the heat insulation baffles are threadedly connected to the lead screw through the moving block.

[0009] Preferably, the lead screw is provided with two sections of threads with opposite directions, and the moving blocks are symmetrically arranged on the two sections of threads.

[0010] Preferably, the end of the heat insulation baffle opposite to the moving block is slidably connected to the inner wall of the connecting cover by a slider, and a sealing block that engages with each other is provided on the opposite side of the heat insulation baffle.

[0011] Preferably, the dust removal assembly includes a mounting plate, a dust hopper, a spray pipe, and a scraper. The mounting plate is connected to the output end of a hydraulic cylinder. The dust hopper is fixed in a ring shape at the edge of the mounting plate. The spray pipe is located at the bottom of the mounting plate, and the scraper is located at the top of the mounting plate.

[0012] Preferably, the inner diameter of the connecting pipe and the flue body are the same, and the ash hopper shovel and the water scraper are both in contact with the inner wall of the connecting pipe and the flue body.

[0013] Preferably, the spray pipe is arranged in a ring shape, and atomizing nozzles are evenly spaced on the spray pipe. The water inlet of the spray pipe is connected to an external water source through a pipe of sufficient length.

[0014] Preferably, a baffle plate is provided at the connection between the flue pipe and the flue body, and a drain port is provided at the corresponding position between the flue body and the sealing cover.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. This utility model uses the output end of a hydraulic cylinder to push the ash removal component downwards into the flue body along the connecting pipe. The ash hopper, spray pipe, and scraper of the ash removal component can respectively shovel ash, wash and scrape water on the inner wall of the flue body. Through the coordinated operation of shoveling, spraying and scraping, the accumulated ash on the inner wall of the flue can be removed comprehensively and efficiently. Compared with the traditional single ash removal method, the ash removal effect is significantly improved, which effectively improves the heat exchange efficiency of the waste heat boiler.

[0017] 2. By setting up protective components, this utility model can protect the dust removal components and improve their service life by separating the connecting pipe from the main body of the flue through heat insulation baffles while the flue body is venting smoke.

[0018] 3. During cleaning, the sealing cover at the drain outlet is removed. As the cleaning component moves down, dust and sewage can be discharged through the drain outlet, making it convenient to clean the sewage and dust generated during the cleaning process, keeping the inside of the flue clean, and making maintenance simple and convenient. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the flue body of this utility model;

[0021] Figure 3 This is a schematic diagram of the protective component structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the dust removal component of this utility model;

[0023] Figure 5 This is a schematic diagram of the bottom structure of the mounting plate of this utility model.

[0024] In the diagram: 1. Main flue; 2. Exhaust pipe; 3. Inlet pipe;

[0025] 4. Protective components; 41. Connecting cover; 42. Servo motor; 43. Lead screw; 44. Moving block; 45. Heat insulation baffle;

[0026] 5. Connecting pipe; 6. Hydraulic cylinder;

[0027] 7. Dust removal assembly; 71. Mounting plate; 72. Dust hopper shovel; 73. Spray pipe; 74. Scraper strip;

[0028] 8. Sealing cover plate; 9. Dirt baffle plate. Detailed Implementation

[0029] 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.

[0030] The following describes an embodiment of this utility model based on its overall structure.

[0031] Example 1

[0032] like Figures 1 to 5As shown, this utility model provides a waste heat boiler flue cleaning structure, including a flue body 1, with an exhaust pipe 2 and an inlet pipe 3 connected to the upper and lower ends of the flue body 1 respectively. A protective component 4 is connected to the top of the flue body 1, and a connecting pipe 5 is fixed to the top of the protective component 4. The two ends of the connecting cover 41 of the protective component 4 are connected to the flue body 1 and the connecting pipe 5 respectively through flanges. A hydraulic cylinder 6 is installed on the top of the connecting pipe 5 and is fixed to the top of the connecting pipe 5 by bolts. A cleaning component 7 is connected to the output end of the hydraulic cylinder 6 and is connected to the center of the mounting plate 71 of the cleaning component 7. The cleaning component 7 is set inside the connecting pipe 5. A sealing cover plate 8 is threadedly connected to the bottom of the flue body 1. External and internal threads that cooperate with each other are provided between the bottom of the flue body 1 and the inner wall of the sealing cover plate 8.

[0033] In this embodiment, the protective component 4 includes a connecting cover 41, a servo motor 42, a lead screw 43, a moving block 44, and a heat insulation baffle 45. The connecting cover 41 is disposed between the connecting pipe 5 and the flue body 1. The interior of the connecting cover 41 is a hollow structure. The servo motor 42 is installed on one side of the connecting cover 41, and the output shaft of the servo motor 42 is connected to the lead screw 43. The lead screw 43 is disposed inside the connecting cover 41. The heat insulation baffles 45 are symmetrically arranged and are threadedly connected to the lead screw 43 via the moving block 44. The lead screw 43 has two sections of threads with opposite directions. The moving block 44 is symmetrically arranged on the two sections of threads. The heat insulation baffles 45 are connected to the lead screw 43 via the moving block 44. The opposite end of the movable block 44 is slidably connected to the inner wall of the connecting cover 41 via a slider. The inner wall of the connecting cover 41 is provided with a guide groove that matches the slider, which serves as a guide when the heat insulation baffle 45 is opened and closed. On the opposite side of the heat insulation baffle 45, there are mutually engaging sealing blocks. When the heat insulation baffle 45 is closed, the sealing blocks fit together to achieve a seal, reducing smoke leakage. Before and after ash removal or during normal boiler operation, the servo motor 42 in the protection component 4 can be activated, which drives the lead screw 43 to rotate. Since the two threads on the lead screw 43 are in opposite directions, the movable blocks 44 symmetrically arranged on the two threads will drive the heat insulation baffle 45 to move towards or away from each other.

[0034] Example 2

[0035] like Figures 1 to 5As shown, this utility model provides a waste heat boiler flue cleaning structure, including a flue body 1. The upper and lower ends of the flue body 1 are respectively connected to an exhaust pipe 2 and an inlet pipe 3. A protective component 4 is connected to the top of the flue body 1. A connecting pipe 5 is fixed to the top of the protective component 4. The two ends of the connecting cover 41 of the protective component 4 are connected to the flue body 1 and the connecting pipe 5 respectively through flanges. A hydraulic cylinder 6 is installed on the top of the connecting pipe 5. The hydraulic cylinder 6 is fixed to the top of the connecting pipe 5 by bolts. A cleaning component 7 is connected to the output end of the hydraulic cylinder 6. The output end of the hydraulic cylinder 6 is connected to the center of the mounting plate 71 of the cleaning component 7. The cleaning component 7 is set inside the connecting pipe 5. A sealing cover plate 8 is threadedly connected to the bottom of the flue body 1. There are mutually cooperating external threads and internal threads between the bottom of the flue body 1 and the inner wall of the sealing cover plate 8.

[0036] In this embodiment, the dust removal assembly 7 includes a mounting plate 71, a dust hopper 72, a spray pipe 73, and a scraper 74. The mounting plate 71 is connected to the output end of the hydraulic cylinder 6. The dust hopper 72 is fixed in a ring shape at the edge of the mounting plate 71, with a chamfered edge. The spray pipe 73 is located at the bottom of the mounting plate 71, and the scraper 74 is located at the top of the mounting plate 71. The connecting pipe 5 and the flue body 1 have the same inner diameter, so that the dust removal assembly 7 can fit against the inner wall of the flue body 1 when it enters from the connecting pipe 5. Both the dust hopper 72 and the scraper 74 fit against the inner wall of the connecting pipe 5 and the flue body 1. The spray pipe 73 is arranged in a ring shape, and atomizing nozzles are equidistantly arranged on the spray pipe 73. The spray pipe 73 is a ring coil. Eight to twelve atomizing nozzles are arranged equidistantly along the circumference. The spraying position of the atomizing nozzles is located below the ash shovel 72. The water inlet of the spray pipe 73 is connected to an external water source through a pipe of sufficient length. The outer layer of the pipe is wrapped with a fireproof and heat-insulating layer. The top of the connecting pipe 5 has a through hole for the pipe to pass through. When cleaning the ash, the hydraulic cylinder 6 is activated, and its output end pushes the ash cleaning component 7 downward along the connecting pipe 5 into the flue body 1. The ash shovel 72 in the ash cleaning component 7 fits against the inner wall of the flue body 1 and the connecting pipe 5. During the descent, it shovels up the accumulated ash. At the same time, the annularly arranged spray pipe 73 sprays water onto the inner wall of the flue through the atomizing nozzles to moisten the accumulated ash and make it easier to clean. The squeegee 74 scrapes off the residual water stains to prevent water stains from causing corrosion to the inner wall of the flue.

[0037] Example 3

[0038] like Figures 1 to 5As shown, this utility model provides a waste heat boiler flue cleaning structure, including a flue body 1. The upper and lower ends of the flue body 1 are respectively connected to an exhaust pipe 2 and an inlet pipe 3. A protective component 4 is connected to the top of the flue body 1. A connecting pipe 5 is fixed to the top of the protective component 4. The two ends of the connecting cover 41 of the protective component 4 are connected to the flue body 1 and the connecting pipe 5 respectively through flanges. A hydraulic cylinder 6 is installed on the top of the connecting pipe 5. The hydraulic cylinder 6 is fixed to the top of the connecting pipe 5 by bolts. A cleaning component 7 is connected to the output end of the hydraulic cylinder 6. The output end of the hydraulic cylinder 6 is connected to the center of the mounting plate 71 of the cleaning component 7. The cleaning component 7 is set inside the connecting pipe 5. A sealing cover plate 8 is threadedly connected to the bottom of the flue body 1. There are mutually cooperating external threads and internal threads between the bottom of the flue body 1 and the inner wall of the sealing cover plate 8.

[0039] In this embodiment, a baffle plate 9 is provided at the connection between the flue pipe 3 and the flue body 1. The baffle plate 9 can prevent the dust and sewage generated during cleaning from entering the flue pipe 3. A drain port is provided at the corresponding position of the flue body 1 and the sealing cover plate 8. When cleaning, the sealing cover plate 8 is removed, and the sewage and dust generated during cleaning are finally discharged through the drain port at the bottom of the flue body 1 and through the sealing cover plate 8. This facilitates centralized cleaning of the sewage and dust generated during the cleaning process and keeps the inside of the flue clean.

[0040] The hydraulic cylinder is existing technology and will not be described in detail. This invention also includes a power supply, controller, and switches, which are not the main technical points of this patent and will not be described in detail. The wiring diagram of the motor in this invention is common knowledge in the field, and its working principle is already known technology. The appropriate model should be selected based on actual use; therefore, the control method and wiring layout of the motor will not be explained in detail.

[0041] The working principle and process of the waste heat boiler flue cleaning structure: When it is necessary to clean the flue body 1, the hydraulic cylinder 6 is activated, and its output end pushes the cleaning component 7 downward along the connecting pipe 5 into the flue body 1. The ash hopper shovel 72 in the cleaning component 7 adheres to the inner wall of the flue body 1 and the connecting pipe 5, shoveling up the accumulated ash during the descent. At the same time, the annular spray pipe 73 sprays water onto the inner wall of the flue through atomizing nozzles to moisten the accumulated ash, making it easier to clean. The scraper 74 scrapes off the residual water stains. The sewage and dust generated during cleaning are finally discharged through the drain port at the bottom of the flue body 1 and through the sealing cover 8. Through the coordinated operation of shoveling, spraying, and scraping, the inside of the flue can be thoroughly and efficiently cleaned. When ash accumulates on the wall, the servo motor 42 in the protection component 4 can be activated before or after ash removal or during normal boiler operation. This motor drives the lead screw 43 to rotate. Since the two threads on the lead screw 43 are in opposite directions, the moving blocks 44 symmetrically arranged on the two threads will drive the heat insulation baffles 45 to move towards or away from each other. When ash removal is required, the heat insulation baffles 45 move away from each other to open the channel, making it easier for the ash removal component 7 to enter the flue body 1. When ash removal is completed or the boiler is running, the heat insulation baffles 45 move towards each other to close. The sealing blocks on their opposite sides interlock to ensure a seal. The heat insulation baffles 45 can block the upward transfer of heat in the flue, protect the ash removal component 7 in the connecting pipe 5, and improve the service life of the ash removal component.

[0042] 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.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waste heat boiler flue cleaning structure, comprising a flue body (1), characterized in that: The upper and lower ends of the flue body (1) are respectively connected to the exhaust pipe (2) and the inlet pipe (3). The top end of the flue body (1) is connected to the protective component (4). The top of the protective component (4) is fixed with the connecting pipe (5). The top of the connecting pipe (5) is equipped with a hydraulic cylinder (6). The output end of the hydraulic cylinder (6) is connected to the cleaning component (7). The cleaning component (7) is set inside the connecting pipe (5). The bottom of the flue body (1) is threaded with a sealing cover plate (8).

2. The flue dust removing structure of a waste heat boiler according to claim 1, characterized by: The protective component (4) includes a connecting cover (41), a servo motor (42), a lead screw (43), a moving block (44), and a heat insulation baffle (45). The connecting cover (41) is disposed between the connecting pipe (5) and the flue body (1). The servo motor (42) is installed on one side of the connecting cover (41). The output shaft of the servo motor (42) is connected to the lead screw (43). The lead screw (43) is disposed inside the connecting cover (41). The heat insulation baffle (45) is symmetrically arranged, and the heat insulation baffle (45) is threadedly connected to the lead screw (43) through the moving block (44).

3. The flue dust collecting structure of a waste heat boiler according to claim 2, characterized by: The lead screw (43) is provided with two sections of threads with opposite directions, and the moving block (44) is symmetrically arranged on the two sections of threads.

4. The flue dust removing structure of a waste heat boiler according to claim 3, characterized by: The end of the heat insulation baffle (45) opposite to the moving block (44) is slidably connected to the inner wall of the connecting cover (41) by a slider, and a sealing block that engages with each other is provided on the opposite side of the heat insulation baffle (45).

5. The flue dust collecting structure of a waste heat boiler according to claim 4, characterized in that: The dust removal assembly (7) includes a mounting plate (71), a dust hopper (72), a spray pipe (73), and a scraper (74). The mounting plate (71) is connected to the output end of the hydraulic cylinder (6). The dust hopper (72) is fixed in a ring shape at the edge of the mounting plate (71). The spray pipe (73) is located at the bottom of the mounting plate (71), and the scraper (74) is located at the top of the mounting plate (71).

6. The flue dust removing structure of a waste heat boiler according to claim 5, characterized by: The inner diameter of the connecting pipe (5) and the flue body (1) is the same, and the ash hopper shovel (72) and the water scraper (74) are both attached to the inner wall of the connecting pipe (5) and the flue body (1).

7. The flue dust collecting structure of a waste heat boiler according to claim 6, characterized in that: The spray pipe (73) is arranged in a ring shape, and atomizing nozzles are arranged at equal intervals on the spray pipe (73). The inlet of the spray pipe (73) is connected to an external water source through a pipe of sufficient length.

8. The flue dust collecting structure of a waste heat boiler according to claim 7, characterized by: A baffle plate (9) is provided at the connection between the flue pipe (3) and the flue body (1), and a drain outlet is provided at the corresponding position between the flue body (1) and the sealing cover plate (8).

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