Automatic soot cleaning preheater

Abstract

This application relates to the technical field of heat exchangers, and in particular to a preheater with automatic ash removal capabilities. The preheater includes a heat exchange box with an air inlet and an air outlet. A cleaning mechanism and multiple heat exchange tubes are disposed within the heat exchange box. The cleaning mechanism includes a cleaning plate that reciprocates intermittently within the heat exchange box. The cleaning plate has multiple cleaning holes that correspond to the heat exchange tubes, and each cleaning hole contains a cleaning component. This application utilizes the intermittent reciprocating motion of the cleaning plate in the cleaning mechanism to drive a flexible scraper to clean the ash accumulated on the outer wall of the heat exchange tubes. This prevents ash buildup from affecting heat exchange efficiency, ensuring the heat exchange effect of the preheater and reducing energy consumption. Simultaneously, the intermittent reciprocating motion allows for effective cleaning when ash accumulates to a certain level, avoiding energy waste and mechanical wear from continuous cleaning, thus achieving a balance between cleaning efficiency and component lifespan.

Description

Technical Field

[0001] This application relates to the technical field of heat exchangers, and in particular to a preheater that automatically cleans accumulated ash. Background Technology

[0002] Preheaters are widely used in many industrial fields such as chemical, power, and metallurgy. They preheat the transmission medium using waste heat, thereby improving energy utilization efficiency. However, in actual operation, the surface of the heat exchanger tubes of the preheater is prone to accumulating dust and impurities. As the dust accumulates, it will seriously affect the heat exchange efficiency of the heat exchanger, leading to a decrease in preheating effect and an increase in energy consumption.

[0003] A search revealed Chinese Patent Publication No. CN222963975U, which discloses an air preheater for a heating boiler, including a flue gas inlet mechanism; it also includes a heat dissipation mechanism, a heat exchange mechanism, an air inlet mechanism, an exhaust mechanism, and a cleaning mechanism. The flue gas inlet mechanism is installed at the top of the heat exchange mechanism, the heat dissipation mechanism is installed inside the heat exchange mechanism, the air inlet mechanism is installed on the right side of the heat exchange mechanism, the exhaust mechanism is installed on the left side of the heat exchange mechanism, and the cleaning mechanism is installed at the top of the heat exchange mechanism.

[0004] Regarding the aforementioned related technologies, the inventors have discovered the following drawbacks: Existing technologies require manual, periodic cleaning of the heat exchange tubes of the preheater, resulting in high labor and time costs and reduced production continuity. This application addresses these issues by using a heat exchange medium-driven cleaning mechanism to intermittently reciprocate and clean the accumulated ash on the heat exchange tubes. This solves the problems of labor-intensive manual cleaning and its impact on production continuity, achieving automatic ash removal, improved heat exchange efficiency, and reduced costs. Utility Model Content

[0005] To reduce labor and time costs and improve production continuity, this application provides a preheater that automatically cleans accumulated ash.

[0006] This application provides an automatic dust-cleaning preheater, employing the following technical solution: It includes a heat exchange box with an air inlet and an air outlet; the heat exchange box contains a cleaning mechanism and multiple heat exchange tubes; the cleaning mechanism includes a cleaning plate that intermittently reciprocates within the heat exchange box; the cleaning plate has multiple cleaning holes that correspond to the heat exchange tubes, and each cleaning hole contains a cleaning component. The cleaning component cleans the dust from the outer wall of the heat exchange tubes.

[0007] Optionally, a first connecting part is fixedly provided inside the heat exchange box; a first rotating disk is rotatably provided on the upper end surface of the first connecting part.

[0008] Optionally, the first rotating disk is provided with a single tooth; an impeller is coaxially fixed on the upper end face of the first rotating disk.

[0009] Optionally, a second bevel gear is rotatably disposed on the first connecting part, capable of meshing with the teeth on the first rotating disk.

[0010] Optionally, a third bevel gear capable of meshing with the second bevel gear is rotatably provided on the lower end face of the first connecting part.

[0011] Optionally, a first rotating rod is fixedly installed on the cleaning plate, and the first rotating rod is rotatably connected to a second connecting arm.

[0012] Optionally, a third connecting arm is fixedly provided on the lower end face of the third bevel gear, and the third connecting arm is rotatably connected to the second connecting arm.

[0013] Optionally, the cleaning component may be a scraper made of a flexible material.

[0014] In summary, this application includes the following beneficial technical effects:

[0015] 1. This utility model utilizes the intermittent reciprocating motion of the cleaning plate in the cleaning mechanism to drive a flexible scraper to clean the accumulated ash on the outer wall of the heat exchange tubes. This prevents ash adsorption from affecting heat exchange efficiency, ensures the heat exchange effect of the preheater, and reduces energy consumption. Simultaneously, the intermittent reciprocating motion allows for effective cleaning when ash accumulates to a certain level, avoiding energy waste and mechanical wear caused by continuous cleaning, thus achieving a balance between cleaning efficiency and component lifespan.

[0016] 2. This utility model utilizes the flow of heat exchange medium within the heat exchange box to drive the impeller to rotate, which in turn drives the cleaning plate to move through gear transmission and other structures, achieving automatic cleaning without the need for regular manual cleaning, reducing labor and time costs, and ensuring continuous production. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application;

[0018] Figure 2 This is a schematic diagram of the internal structure of the heat exchange box in an embodiment of this application;

[0019] Figure 3 This is a schematic diagram of the cleaning mechanism in an embodiment of this application;

[0020] Figure 4 This is a schematic diagram of the structure of the first rotating disk in the embodiments of this application.

[0021] Reference numerals in the attached drawings: 1. Heat exchange box; 2. Air inlet; 3. Air outlet; 4. Cleaning plate; 5. Heat exchange tube; 6. First connecting part; 7. First rotating disk; 8. Gear; 9. Impeller; 10. Second bevel gear; 11. Third bevel gear; 12. Second connecting arm; 13. Third connecting arm. Detailed Implementation

[0022] The following is in conjunction with the appendix Figures 1-4 This application will be further described in detail below. The technical solutions in the embodiments of this application will be clearly described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0023] This application discloses a preheater that automatically cleans accumulated ash. For example... Figure 1 As shown, it includes a heat exchange box 1, which is provided with an air inlet 2 and an air outlet 3; a cleaning mechanism and multiple heat exchange tubes 5 are provided inside the heat exchange box 1; the cleaning mechanism includes a cleaning plate 4 that reciprocates intermittently inside the heat exchange box 1; the cleaning plate 4 is provided with multiple cleaning holes that match the heat exchange tubes 5, and each cleaning hole is provided with a cleaning component.

[0024] In this embodiment, a heat exchange medium is introduced into the heat exchange box 1 from the air inlet 2. The heat exchange medium absorbs the heat emitted by the heat exchange tubes 5 and discharges the heat exchange medium after heat exchange from the air outlet 3. During this process, the heat exchange medium moving in the heat exchange box 1 drives the cleaning plate 4 to move intermittently back and forth in the heat exchange box 1 to clean the outer wall of all the heat exchange tubes 5, so as to avoid the heat exchange effect being reduced due to the adsorption of dust on the outer wall of the heat exchange tubes 5.

[0025] Please see Figure 2 A first connecting part 6 is fixedly provided inside the heat exchange box 1; a first rotating disk 7 is rotatably provided on the upper end face of the first connecting part 6; a single tooth 8 is provided on the first rotating disk 7; an impeller 9 is coaxially fixedly provided on the upper end face of the first rotating disk 7; a second bevel gear 10 that can mesh with the tooth 8 on the first rotating disk 7 is rotatably provided on the first connecting part 6.

[0026] In this embodiment, when the heat exchange medium moves in the heat exchange box 1, it will drive the impeller 9 to rotate, and the rotating impeller 9 will drive the first rotating disk 7 to rotate. Since the first rotating disk 7 is provided with a single tooth 8, the first rotating disk 7 can only mesh with the second bevel gear 10 once through the tooth 8 in one rotation. Therefore, after the impeller 9 drives the first rotating disk 7 to rotate a certain number of times, the second bevel gear 10 can rotate once.

[0027] Please see Figure 3The lower end face of the first connecting part 6 is rotatably provided with a third bevel gear 11 that can mesh with the second bevel gear 10; a first rotating rod is fixedly provided on the cleaning plate 4, and the first rotating rod is rotatably connected to the second connecting arm 12; a third connecting arm 13 is fixedly provided on the lower end face of the third bevel gear 11, and the third connecting arm 13 is rotatably connected to the second connecting arm 12; the lower end face of the third bevel gear 11 is fixedly provided with the third connecting arm 13, and the third connecting arm 13 is rotatably connected to the second connecting arm 12.

[0028] In this embodiment, the second bevel gear 10 meshes with and drives the third bevel gear 11 to rotate. The third bevel gear 11 drives the third connecting arm 13 to rotate around the center of the third bevel gear 11, thereby causing the third connecting arm 13 to drive the cleaning plate 4 to reciprocate on multiple heat exchange tubes 5 through the second connecting arm 12.

[0029] The cleaning components can use scrapers made of flexible materials;

[0030] In this embodiment, when the cleaning plate 4 moves intermittently back and forth, it drives multiple scrapers to clean the outer wall of the heat exchange tube 5.

[0031] The implementation principle of the preheater for automatically cleaning accumulated ash in this application embodiment is as follows:

[0032] The heat exchange medium enters through the air inlet 2 of the heat exchange box 1, absorbs the heat emitted by the heat exchange tube 5 during its flow inside the box, and is discharged from the air outlet 3 after completing the heat exchange. The flow of the heat exchange medium in the heat exchange box 1 drives the impeller 9, which is coaxially fixed on the upper end face of the first rotating disk 7, to rotate. The impeller 9 drives the first rotating disk 7 to rotate. Since the first rotating disk 7 is only provided with a single tooth 8, it can only mesh with the second bevel gear 10 once per rotation. This means that the impeller 9 needs to rotate a certain number of times before the second bevel gear 10 will rotate once. The second bevel gear 10 and the third bevel gear 11... When the second bevel gear 10 rotates, it drives the third bevel gear 11 to rotate. When the third bevel gear 11 rotates, the third connecting arm 13, which is fixed at its lower end, will rotate around the center of the third bevel gear 11. The third connecting arm 13, through its rotational connection with the second connecting arm 12, drives the cleaning plate 4 to reciprocate on multiple heat exchange tubes 5. The cleaning plate 4 is provided with multiple cleaning holes that match the heat exchange tubes 5. When the cleaning plate 4 reciprocates intermittently, the flexible scraper in each cleaning hole cleans the dust accumulated on the outer wall of the heat exchange tube 5, so as to avoid the dust accumulation affecting the heat exchange efficiency.

[0033] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A preheater for automatically cleaning accumulated ash, comprising a heat exchange box, characterized in that: The heat exchange box is provided with an air inlet and an air outlet; the heat exchange box is provided with a cleaning mechanism and multiple heat exchange tubes; the cleaning mechanism includes a cleaning plate that reciprocates intermittently within the heat exchange box; the cleaning plate is provided with multiple cleaning holes that match the heat exchange tubes, and each cleaning hole is provided with a cleaning component.

2. The preheater for automatically cleaning accumulated ash according to claim 1, characterized in that: A first connecting part is fixedly installed inside the heat exchange box; a first rotating disk is rotatably installed on the upper end surface of the first connecting part.

3. The preheater for automatically cleaning accumulated ash according to claim 2, characterized in that: The first rotating disk is provided with a single tooth; an impeller is coaxially fixed on the upper end face of the first rotating disk.

4. The preheater for automatically cleaning accumulated ash according to claim 2, characterized in that: A second bevel gear is rotatably mounted on the first connecting part, capable of meshing with the teeth on the first rotating disk.

5. A preheater for automatically cleaning accumulated ash according to claim 2, characterized in that: The lower end face of the first connecting part is rotatably provided with a third bevel gear that can mesh with the second bevel gear.

6. The preheater for automatically cleaning accumulated ash according to claim 1, characterized in that: A first rotating rod is fixedly installed on the cleaning plate, and a second connecting arm is rotatably connected to the first rotating rod.

7. A preheater for automatically cleaning accumulated ash according to claim 5, characterized in that: A third connecting arm is fixedly provided on the lower end face of the third bevel gear, and the third connecting arm is rotatably connected to the second connecting arm.

8. A preheater for automatically cleaning accumulated ash according to claim 1, characterized in that: The cleaning component may be a scraper made of a flexible material.

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