Coal boiler heat exchanger facilitating ash cleaning

Abstract

The utility model relates to heat exchanger technical field, concretely is a coal boiler heat exchanger convenient to clean ash, the one side detachable connection of casing has the mounting panel, the inner wall of casing is connected with a plurality of fins slidingly, the inner wall of casing's shell cavity is fixed with a plurality of heat exchange pipes, the heat exchange pipe penetrates the slot and is connected with the silica gel cover inner wall slidingly, the utility model discloses through being provided with vibrating mechanism, through knocking makes the vibration of fin, utilizes the vibration and makes dust loose, and the surface dust is shaken and falls, realizes the automatic cleaning of fin and is convenient to the cleaning of dust in later period, and the position of fin can move in the casing, through adjusting the distance between fins, increase the distance between fins, and it is convenient to clean the tool and go into the inside of heat exchanger, realize the sufficient cleaning of coal boiler heat exchanger, reduced the cleaning difficulty of coal boiler heat exchanger, improved the cleaning efficiency of coal boiler heat exchanger.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, specifically a coal boiler heat exchanger that is easy to clean. Background Technology

[0002] Coal-fired boiler heat exchangers are waste heat recovery devices specifically designed for coal-fired boilers. They recover waste heat from flue gas to preheat fuel or working fluid, improving boiler thermal efficiency and reducing energy consumption. Their core function is to utilize the sensible heat of high-temperature flue gas and the latent heat of steam to achieve efficient energy utilization. Finned heat exchangers are commonly used in coal-fired boilers. The exhaust gas from the coal boiler passes through the heat exchanger, where heat is transferred via fins, thus fully utilizing the heat in the exhaust gas. However, during the use of finned heat exchangers, dust from the exhaust gas adheres to the surface of the fins. This dust forms a heat-insulating film on the fin surface, affecting the heat exchanger's efficiency.

[0003] Most existing finned heat exchangers are one-piece units, making disassembly difficult after assembly. This hinders internal cleaning, and the narrow fin gaps and fixed spacing between fins make it difficult to reach the surface with brushes and other tools. Furthermore, high-pressure water jets can easily bend the fins, resulting in incomplete cleaning. Therefore, there is a need to develop a coal-fired boiler heat exchanger that facilitates internal cleaning. Utility Model Content

[0004] To address the above technical problems, this utility model provides a coal-fired boiler heat exchanger that is easy to clean internally, thus solving the problems of difficult and incomplete cleaning of the interior of existing finned heat exchangers.

[0005] To solve the above-mentioned technical problems, the present invention provides a coal-fired boiler heat exchanger for easy ash removal, comprising a shell and a mounting plate. The mounting plate is detachably connected to one side of the shell. A plurality of fins are slidably connected to the inner wall of the shell. A plurality of slots are provided inside the fins. Silicone sleeves are fixedly connected to the inner walls of the slots. A plurality of heat exchange tubes are fixedly installed on the inner wall of the shell cavity. The heat exchange tubes are interconnected. The outlet and inlet ends of the heat exchange tubes are located on one side of the shell. The heat exchange tubes pass through the slots and... The housing is slidably connected to the inner wall of the silicone sleeve. A discharge port is provided on the lower surface of the housing. Slots are provided on both sides of the lower surface of the housing. A dust collection box is inserted into the lower end of the housing through the slots. Positioning mechanisms for fixing the mounting plate are provided on both side walls of the housing. A vibration mechanism is provided on the inner wall of the top surface of the housing. The vibration mechanism includes a fixed plate and a fixed cover. A striking block is fixedly connected to the lower surface of the fixed plate. A sliding plate is fixedly connected to the side wall of the fixed plate. A support spring is fixedly connected to the lower surface of the sliding plate.

[0006] Furthermore, the upper surface of the fin is provided with a groove, the inner wall of the groove is provided with a sliding groove, the outer surface of the slide plate is slidably connected to the inner wall of the sliding groove, and one end of the support spring is fixedly connected to the bottom inner wall of the sliding groove.

[0007] Furthermore, the upper surface of the fixing cover is fixedly connected to the inner wall of the top surface of the housing, and limit blocks are fixedly connected to both inner walls of the fixing cover. A connecting spring is fixedly connected to the inner wall of the top surface of the fixing cover.

[0008] Furthermore, a movable block is fixedly connected to one end of the connecting spring, the outer surface of the movable block is slidably connected to the inner surface of the fixed cover, and limit grooves are formed on both side walls of the movable block, with the inner wall of the limit groove slidably connected to the outer surface of the limit block.

[0009] Furthermore, one end of the movable block extends into the interior of the groove, and an inclined plate is fixedly connected to the side wall of the movable block, the inclined plate and the fixed plate being mutually adapted to each other.

[0010] Furthermore, several partition blocks are fixedly installed at equal intervals on the side wall of the mounting plate, and positioning sleeves are symmetrically fixedly installed on the side wall of the mounting plate, with the positioning sleeves close to both sides of the mounting plate.

[0011] Furthermore, the positioning mechanism includes a fixed frame, on the side wall of the fixed frame a positioning spring is fixedly installed, and a dial is fixedly installed at one end of the positioning spring.

[0012] Furthermore, a positioning pin is fixedly installed on the side wall of the dial. One end of the positioning pin passes through the interior of the positioning spring and the fixing frame and extends into the interior of the housing. One end of the positioning pin is adapted to the positioning sleeve.

[0013] This utility model has the following advantages compared with the prior art:

[0014] 1. This utility model incorporates a vibration mechanism that uses displacement to drive a fixed plate. Under the action of an inclined plate, the fixed plate first moves upward, and then quickly returns to its original position under the action of a support spring. This rapid return causes a striking block to strike the fins, causing them to vibrate. This vibration loosens the dust and shakes off surface dust, achieving automatic cleaning of the fins and facilitating subsequent dust removal. The fins can be moved within the housing, and by adjusting the distance between them, cleaning tools can be inserted deeper into the heat exchanger, enabling thorough cleaning of the coal-fired boiler heat exchanger. This reduces the difficulty of cleaning the coal-fired boiler heat exchanger and improves its cleaning efficiency.

[0015] 2. This utility model has a positioning mechanism that connects the mounting plate and the shell through positioning pins. The structure is simple and realizes the modularization of the coal boiler heat exchanger, which facilitates the disassembly of the coal boiler heat exchanger and makes it easier to clean the inside of the coal boiler heat exchanger, thus ensuring the cleaning effect of the coal boiler heat exchanger. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is an exploded structural diagram of the present invention.

[0018] Figure 3 This is an exploded structural diagram of the present invention from another angle.

[0019] Figure 4 This is a partially exploded structural diagram of the fins and vibration mechanism in this utility model.

[0020] Figure 5 This is a partial cross-sectional structural diagram of the present invention.

[0021] Figure 6 This is a partially exploded structural diagram of the vibration mechanism in this utility model.

[0022] In the diagram: 1. Shell; 2. Mounting plate; 3. Fins; 4. Heat exchange tube; 5. Positioning mechanism; 501. Fixing bracket; 502. Positioning spring; 503. Dial; 504. Positioning pin; 6. Positioning sleeve; 7. Divider block; 8. Slot; 9. Dust collection box; 10. Groove; 11. Slide; 12. Vibration mechanism; 1201. Fixing plate; 1202. Striking block; 1203. Slide plate; 1204. Support spring; 1205. Fixing cover; 1206. Limiting block; 1207. Movable block; 1208. Connecting spring; 1209. Limiting groove; 1210. Inclined plate; 13. Silicone sleeve. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] like Figure 1-6The diagram shows a coal-fired boiler heat exchanger for easy ash removal, comprising a shell 1 and a mounting plate 2. The shell 1 and mounting plate 2 are detachably connected and mutually compatible. Several fins 3 are slidably mounted on the inner wall of the shell 1. Several slots are provided inside the fins 3, and silicone sleeves 13 are fixedly mounted on the inner wall of the slots. Several heat exchange tubes 4 are fixedly mounted on the inner wall of the shell cavity of the shell 1, and the heat exchange tubes 4 are interconnected. The outlet and inlet ends of the heat exchange tubes 4 are located on one side of the shell 1. The heat exchange tubes 4 pass through the interior of the slots and are slidably connected to the inner wall of the silicone sleeves 13. A discharge port is provided on the lower surface of the shell 1, and slots 8 are symmetrically fixedly mounted on the lower surface of the shell 1, distributed on both sides of the discharge port. The inner wall of the slots 8 is slidably connected to the inner wall of the silicone sleeves 13. The housing 1 is equipped with a dust collection box 9. Positioning mechanisms 5 for fixing the mounting plate 2 are provided on both sides of the housing 1. A vibration mechanism 12 is provided on the inner wall of the top surface of the housing 1. The vibration mechanism 12 includes a fixed plate 1201 and a fixed cover 1205. A striking block 1202 is fixedly installed on the lower surface of the fixed plate 1201. A sliding plate 1203 is fixedly installed on the side wall of the fixed plate 1201. A support spring 1204 is fixedly installed on the lower surface of the sliding plate 1203. A groove 10 is provided on the upper surface of the fin 3. A sliding groove 11 is provided on the inner side wall of the groove 10. The outer surface of the sliding plate 1203 is slidably connected to the inner wall of the sliding groove 11. One end of the support spring 1204 is fixedly connected to the inner wall of the bottom surface of the sliding groove 11.

[0025] The upper surface of the fixed cover 1205 is fixedly connected to the inner wall of the top surface of the housing 1. Limiting blocks 1206 are fixedly installed on both inner walls of the fixed cover 1205. A connecting spring 1208 is fixedly installed on the inner wall of the top surface of the fixed cover 1205. A movable block 1207 is fixedly installed at one end of the connecting spring 1208. The outer surface of the movable block 1207 is slidably connected to the inner surface of the fixed cover 1205. Limiting grooves 1209 are provided on both inner walls of the movable block 1207. The inner wall of the limiting groove 1209 is slidably connected to the outer surface of the limiting block 1206. One end of the movable block 1207 extends into the interior of the groove 10. An inclined plate 1210 is fixedly installed on the side wall of the movable block 1207. The inclined plate 1210 and the fixed plate 1201 are mutually adapted to each other.

[0026] Several partition blocks 7 are fixedly installed at equal intervals on the side wall of the mounting plate 2, and positioning sleeves 6 are symmetrically fixedly installed on the side wall of the mounting plate 2, with the positioning sleeves 6 close to both sides of the mounting plate 2.

[0027] Specifically, by setting up the vibration mechanism 12, the fins 3 move on the surface of the heat exchange tube 4 through the silicone sleeve 13. When the fins 3 move, they will drive the fixed plate 1201 to move synchronously. Since the downward stroke of the movable block 1207 is blocked by the limit block 1206, the fixed plate 1201 will move upward with the inclined plate 1210. At this time, the fixed plate 1201 moves upward in the slide groove 11 through the slide plate 1203. The support spring 1204 is in a stretched state at this time. As the fixed plate 1201 continues to move, it will lose the lifting force of the inclined plate 1210. Under the action of the support spring 1204, it will quickly reset. At this time, the fixed plate 1201 drives the striking block 1202 to strike the fin 3. The fin 3 will vibrate when struck, and the floating dust on the surface of the vibrating fin 3 will fall off. After the fin 3 resets, the fixed plate 1201 will press the inclined plate 1210. At this time, the inclined plate 1210 drives the movable block 1207 to retract into the fixed cover 1205 under the limit of the limiting block 1206 and the limiting groove 1209. After the fin 3 is completely reset, the connecting spring 1208 drives the movable block 1207 to reset.

[0028] The positioning mechanism 5 includes a fixed frame 501, a positioning spring 502 is fixedly installed on the side wall of the fixed frame 501, and a dial 503 is fixedly installed on one end of the positioning spring 502.

[0029] A positioning pin 504 is fixedly installed on the side wall of the dial 503. One end of the positioning pin 504 passes through the interior of the positioning spring 502 and the fixing bracket 501 and extends into the interior of the housing 1. One end of the positioning pin 504 is adapted to the positioning sleeve 6.

[0030] Specifically, by setting up the positioning mechanism 5, the positioning pin 504 is pulled outward from the housing 1 by the dial 503. At this time, one end of the positioning pin 504 is disengaged from the positioning sleeve 6, and the mounting plate 2, which has lost its fixation, is separated from the housing 1. The mounting plate 2 drives the partition block 7 to move away synchronously. At this time, the fins 3 lose the separation of the partition block 7. After the heat exchanger is cleaned, the fins 3 are separated to an approximate appropriate position, and the mounting plate 2 is reset. At this time, under the action of the partition block 7, the fins 3 are reset to the appropriate position. Then, the positioning spring 502 drives the positioning pin 504 to insert into the positioning sleeve 6 through the dial 503 to fix the mounting plate 2, realizing the modularization of the heat exchanger and facilitating the cleaning of the heat exchanger's interior.

[0031] The working principle of this embodiment is as follows:

[0032] Install the shell 1 in a suitable position on the coal boiler, then connect the inlet end of the heat exchange tube 4 to the water pipe and the outlet end to the outlet pipe. When the coal boiler is working, the exhaust gas generated will pass through the interior of the shell 1. At this time, the fins 3 will absorb the heat from the exhaust gas and then transfer the heat to the heat exchange tube 4 to heat the water inside. With prolonged use of the heat exchanger, dust will adhere to the surface of the fins 3, requiring cleaning. During cleaning, pull the positioning pin 504 from the positioning sleeve 6. After the positioning sleeve 6 is no longer secured by the positioning pin 504, remove the mounting plate 2 from the shell 1. The mounting plate 2 will then move... When the spacer 7 is removed synchronously, the fins 3 can move within the housing 1 after the spacer 7 is removed. This allows the space between the fins 3 to be increased by adjusting the distance between each fin 3, making it easier for cleaning tools to penetrate into the interior of the fins 3. During the movement of the fins 3, the striking block 1202 in the vibration mechanism 12 will strike the fins 3. The struck fins 3 will vibrate, and the vibration will shake off the floating dust on the surface of the fins 3. Then, in conjunction with the cleaning tools, the dust on the surface of the fins 3 will be cleaned into the dust collection box 9. After cleaning, the dust collection box 9 will be removed from the slot 8 and then cleaned.

Claims

1. A heat exchanger for a coal-fired boiler that is easy to clean, characterized in that: The enclosure includes a shell (1) and a mounting plate (2). The mounting plate (2) is detachably connected to one side of the shell (1). Several fins (3) are slidably connected to the inner wall of the shell (1). Several slots are provided inside the fins (3). A silicone sleeve (13) is fixedly connected to the inner wall of the slots. Several heat exchange tubes (4) are fixedly installed on the inner wall of the shell cavity of the shell (1). The heat exchange tubes (4) are interconnected. The water outlet and water inlet of the heat exchange tubes (4) are located on one side of the shell (1). The heat exchange tubes (4) pass through the slots and are slidably connected to the inner wall of the silicone sleeve (13). A discharge port is provided on the lower surface of the shell (1). The lower surface of the housing (1) is fixedly connected to slots (8) on both sides. A dust collection box (9) is inserted into the lower end of the housing (1) through the slots (8). Positioning mechanisms (5) for fixing the mounting plate (2) are provided on both sides of the housing (1). A vibration mechanism (12) is provided on the inner wall of the top surface of the housing (1). The vibration mechanism (12) includes a fixing plate (1201) and a fixing cover (1205). A knocking block (1202) is fixedly connected to the lower surface of the fixing plate (1201). A sliding plate (1203) is fixedly connected to the side wall of the fixing plate (1201). A support spring (1204) is fixedly connected to the lower surface of the sliding plate (1203).

2. The coal-fired boiler heat exchanger for easy ash removal according to claim 1, characterized in that: The upper surface of the fin (3) is provided with a groove (10), and the inner sidewall of the groove (10) is provided with a sliding groove (11). The outer surface of the slide plate (1203) is slidably connected to the inner wall of the sliding groove (11), and one end of the support spring (1204) is fixedly connected to the bottom inner wall of the sliding groove (11).

3. The coal-fired boiler heat exchanger for easy ash removal according to claim 2, characterized in that: The upper surface of the fixed cover (1205) is fixedly connected to the inner wall of the top surface of the housing (1). Limiting blocks (1206) are fixedly connected to both inner walls of the fixed cover (1205). A connecting spring (1208) is fixedly connected to the inner wall of the top surface of the fixed cover (1205).

4. The coal-fired boiler heat exchanger for easy ash removal according to claim 3, characterized in that: One end of the connecting spring (1208) is fixedly connected to a movable block (1207). The outer surface of the movable block (1207) is slidably connected to the inner surface of the fixed cover (1205). Limiting grooves (1209) are provided on both sides of the movable block (1207). The inner wall of the limiting groove (1209) is slidably connected to the outer surface of the limiting block (1206).

5. The coal-fired boiler heat exchanger for easy ash removal according to claim 4, characterized in that: One end of the movable block (1207) extends into the interior of the groove (10), and an inclined plate (1210) is fixedly connected to the side wall of the movable block (1207). The inclined plate (1210) and the fixed plate (1201) are mutually adapted to each other.

6. The coal-fired boiler heat exchanger for easy ash removal according to claim 1, characterized in that: A number of partition blocks (7) are fixedly installed at equal intervals on the side wall of the mounting plate (2), and positioning sleeves (6) are fixedly installed symmetrically on the side wall of the mounting plate (2). The positioning sleeves (6) are close to both sides of the mounting plate (2).

7. The coal-fired boiler heat exchanger for easy ash removal according to claim 6, characterized in that: The positioning mechanism (5) includes a fixed frame (501), a positioning spring (502) is fixedly installed on the side wall of the fixed frame (501), and a dial (503) is fixedly installed at one end of the positioning spring (502).

8. The coal-fired boiler heat exchanger for easy ash removal according to claim 7, characterized in that: A positioning pin (504) is fixedly installed on the side wall of the dial (503). One end of the positioning pin (504) passes through the interior of the positioning spring (502) and the fixing frame (501) and extends into the interior of the housing (1). One end of the positioning pin (504) is adapted to the positioning sleeve (6).

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