Anti-clogging horizontal air preheater

Abstract

The utility model discloses a kind of anti-dust-laden horizontal air preheater, it is related to the field of anti-blocking of air preheater, including hot air pipe, the top of hot air pipe one end is welded with the air inlet pipe that protrudes upwards, the top of hot air pipe other end is welded with the air outlet pipe that protrudes upwards, the inside of air inlet pipe, air outlet pipe is installed with the heat exchange pipe extending to the inside of hot air pipe, the inside of the air inlet end of hot air pipe is installed with intercepting net, the inner wall of hot air pipe is slidably installed with ash blowing box by guide mechanism, the side of ash blowing box close to intercepting net is installed with multiple equidistant distribution's air blowing nozzle, the bottom end of ash blowing box is installed with lifting mechanism extending to the outside of hot air pipe.The utility model is provided with lifting mechanism, guide mechanism and intercepting net of inclined design, this kind of design mode is blown after heat exchange ends, the particle impurities adhered to intercepting net, avoid the plugging condition caused by long time use.

Description

Technical Field

[0001] This utility model relates to the field of anti-clogging air preheaters, specifically an anti-clogging horizontal air preheater. Background Technology

[0002] An air preheater uses the high-temperature exhaust gas to heat the air, thus enabling the reuse of heat.

[0003] In existing technologies, high-temperature exhaust gases contain a large number of particulate impurities, and the dense arrangement of heat exchange tubes can easily lead to the accumulation of particulate impurities in the gaps between the heat exchange tubes, resulting in reduced heat exchange efficiency. To avoid this situation, a filter or interception device is usually added. However, particulate impurities can adhere to the surface of the interception mesh, causing blockage. Utility Model Content

[0004] The purpose of this utility model is to provide an anti-clogging horizontal air preheater in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a horizontal air preheater for preventing ash blockage, comprising a hot air duct, an upwardly protruding air inlet pipe welded to one end of the top of the hot air duct, and an upwardly protruding air outlet pipe welded to the other end of the top of the hot air duct. Heat exchange pipes extending into the interior of the air inlet and outlet pipes are installed inside the hot air duct. An intercepting net is installed inside the air inlet end of the hot air duct. A soot blowing box is slidably installed on the inner wall of the hot air duct via a guide mechanism. Multiple equidistantly distributed air nozzles are installed on the side of the soot blowing box near the intercepting net. A lifting mechanism extending to the outside of the hot air duct is installed at the bottom end of the soot blowing box. A lifting pipe penetrating into the interior of the hot air duct is fixedly installed at the output end of the lifting mechanism. Multiple telescopic pipe sections are fixedly installed at the output end of the lifting pipe. The top of the lifting pipe is connected to the multiple telescopic pipe sections via a sliding mechanism.

[0006] As a further embodiment of this utility model: the lifting mechanism includes an electric push cylinder fixedly installed on the outside of the hot air pipe, and a lifting plate is fixedly installed at the bottom of the piston rod of the electric push cylinder, the lifting plate being located below the hot air pipe.

[0007] As a further embodiment of this utility model: the lifting mechanism further includes two vertical rods fixedly installed at the bottom of the hot air pipe, a connecting plate is slidably connected to the outer wall of the vertical rod, a spring that is sleeved with the vertical rod is abutted between the top of the connecting plate and the bottom end of the hot air pipe, the center of the connecting plate is fixedly connected to the outer wall of the lifting pipe, the top bend of the lifting pipe is located in the inner cavity of the hot air pipe, and a telescopic corrugated pipe is installed at the bottom end of the lifting pipe.

[0008] As a further embodiment of this utility model: the guiding mechanism includes guide grooves formed on both sides of the inner wall of the hot air duct, the guide grooves are distributed along the inclined direction of the interception net, and sliding blocks are slidably installed on the inner wall of the guide grooves, the sliding blocks are fixedly installed at both ends of the soot blowing box.

[0009] As a further embodiment of this utility model: the sliding mechanism includes a fixed plate fixedly installed outside the maximum diameter telescopic joint of the multi-section telescopic tube, and a movable plate fixedly installed on the top of the soot blowing box. A guide rod is fixedly installed on one side of the movable plate, penetrating the fixed plate, and the guide rod is slidably connected to the fixed plate.

[0010] As a further improvement of this utility model: an ash hopper is installed at one bottom end of the hot air pipe, and an ash discharge valve is installed on the straight cylindrical part of the ash hopper.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. By setting up a lifting mechanism, a guiding mechanism, and an inclined interception net, this design method blows off the particulate impurities attached to the interception net after heat exchange, avoiding blockage caused by long-term use. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the installation of the lifting mechanism of this utility model; Figure 4 This is a schematic diagram of the structure of the multi-section telescopic tube of this utility model.

[0013] In the diagram: 1. Hot air duct; 2. Inlet duct; 3. Outlet duct; 4. Electric push cylinder; 5. Heat exchange tube; 6. Interception net; 7. Guide groove; 8. Sliding block; 9. Soot blowing box; 10. Multi-section telescopic tube; 11. Moving plate; 12. Fixed plate; 13. Guide rod; 14. Lifting tube; 15. Connecting plate; 16. Vertical rod; 17. Spring; 18. Lifting plate; 19. Ash hopper. Detailed Implementation

[0014] 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.

[0015] Please see Figures 1-4 In this embodiment of the present invention, a horizontal air preheater for preventing ash blockage includes a hot air duct 1. An upwardly protruding air inlet pipe 2 is welded to one end of the top of the hot air duct 1, and an upwardly protruding air outlet pipe 3 is welded to the other end of the top of the hot air duct 1. Heat exchange pipes 5 extending into the interior of the hot air duct 1 are installed inside the air inlet pipe 2 and the air outlet pipe 3. An intercepting net 6 is installed inside the air inlet end of the hot air duct 1. A soot blowing box 9 is slidably installed on the inner wall of the hot air duct 1 through a guide mechanism. Multiple equally spaced air blowing nozzles are installed on the side of the soot blowing box 9 near the intercepting net 6. A lifting mechanism extending to the outside of the hot air duct 1 is installed at the bottom end of the soot blowing box 9. A lifting pipe 14 penetrating into the interior of the hot air duct 1 is fixedly installed at the output end of the lifting mechanism. Multiple telescopic pipes 10 are fixedly installed at the output end of the lifting pipe 14. The top of the lifting pipe 14 is connected to the multiple telescopic pipes 10 through a sliding mechanism. An ash hopper 19 is installed at one end of the bottom of the hot air duct 1. An ash discharge valve is installed on the straight section of the ash hopper 19.

[0016] In this embodiment: First, the high-temperature exhaust gas containing smoke and dust enters the hot air pipe 1 from the inlet end of the hot air pipe 1, while the clean cold air enters the heat exchange pipe 5 through the air inlet pipe 2 to exchange heat with the high-temperature exhaust gas. After heat exchange, the air is discharged from the air outlet pipe 3 through the heat exchange pipe 5. During the above process, when the high-temperature exhaust gas containing soot passes through the interception net 6, the particulate matter in the high-temperature exhaust gas is intercepted by the interception net 6, preventing the particulate matter from contacting the heat exchange tube 5 and causing blockage. In order to prevent the particulate matter from blocking the interception net 6 and causing poor air intake, the lifting mechanism is activated. The lifting mechanism pushes the soot blowing box 9 to slide along the guide mechanism, and the air pump connected to the lifting pipe 14 is activated. The air pump draws in external air and blows it out from the air nozzle through the lifting pipe 14 and the multi-section telescopic pipe 10, blowing off the impurities attached to the interception net 6. The blown-off particulate impurities fall into the ash hopper 19. When the particulate impurities are discharged, the ash discharge valve is opened, and the dust in the ash hopper 19 can be discharged.

[0017] Please refer to this carefully. Figure 3 The lifting mechanism includes an electric push cylinder 4 fixedly installed on the outside of the hot air duct 1. A lifting plate 18 is fixedly installed at the bottom of the piston rod of the electric push cylinder 4. The lifting plate 18 is located below the hot air duct 1. The lifting mechanism also includes two vertical rods 16 fixedly installed at the bottom of the hot air duct 1. A connecting plate 15 is slidably connected to the outer wall of the vertical rod 16. A spring 17 that is sleeved with the vertical rod 16 is abutted between the top of the connecting plate 15 and the bottom end of the hot air duct 1. The center of the connecting plate 15 is fixedly connected to the outer wall of the lifting pipe 14. The top bend of the lifting pipe 14 is located in the inner cavity of the hot air duct 1. A telescopic corrugated pipe is installed at the bottom end of the lifting pipe 14.

[0018] In this embodiment: when heat exchange is paused, the electric push cylinder 4 is activated to move up and down repeatedly. When the electric push cylinder 4 moves upward, it drives the lifting plate 18 to move upward. The lifting plate 18 pushes the connecting plate 15 located at its top to move upward. The connecting plate 15 can then slide along the outer wall of the vertical rod 16. At this time, the spring 17 is compressed. At the same time, the connecting plate 15 drives the lifting pipe 14 to move upward. The lifting pipe 14 pushes the soot blowing box 9 to move along the guide mechanism through the multi-section telescopic pipe 10 to perform soot blowing operation on the interception net 6, blowing off the particulate impurities attached to one side of the interception net 6, ensuring the smooth flow of the next hot exhaust gas.

[0019] Please refer to this carefully. Figure 3 The guiding mechanism includes guide grooves 7 on both sides of the inner wall of the hot air duct 1. The guide grooves 7 are distributed along the inclined direction of the interception net 6. Sliding blocks 8 are slidably installed on the inner wall of the guide grooves 7. The sliding blocks 8 are fixedly installed at both ends of the soot blowing box 9.

[0020] In this embodiment: as the soot blowing box 9 moves upward, it drives the sliding block 8 to slide along the inner wall of the guide groove 7, so that the soot blowing box 9 can move along the inclined direction of the interception net 6 and blow down the particulate impurities attached to the interception net 6.

[0021] Please refer to this carefully. Figure 3 The sliding mechanism includes a fixed plate 12 fixedly installed on the outside of the largest diameter telescopic joint of the multi-section telescopic pipe 10, and a movable plate 11 fixedly installed on the top of the soot blowing box 9. A guide rod 13 that passes through the fixed plate 12 is fixedly installed on one side of the movable plate 11, and the guide rod 13 is slidably connected to the fixed plate 12.

[0022] In this embodiment: during the up-and-down sliding process of the soot blowing box 9, the soot blowing box 9 drives the moving plate 11 to move synchronously, and the moving plate 11 pulls the guide rod 13 to slide against the fixed plate 12.

[0023] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A horizontal air preheater for preventing ash blockage, comprising a hot air duct (1), characterized in that, The hot air duct (1) has an upward-protruding air inlet pipe (2) welded to one end of its top, and an upward-protruding air outlet pipe (3) welded to the other end of its top. The air inlet pipe (2) and the air outlet pipe (3) are equipped with heat exchange pipes (5) extending into the interior of the hot air duct (1). An intercepting net (6) is installed inside the air inlet end of the hot air duct (1). A soot blowing box (9) is slidably installed on the inner wall of the hot air duct (1) through a guide mechanism. Multiple equally spaced air nozzles are installed on the side of the soot blowing box (9) near the intercepting net (6). A lifting mechanism extending to the outside of the hot air duct (1) is installed at the bottom end of the soot blowing box (9). A lifting pipe (14) penetrating into the interior of the hot air duct (1) is fixedly installed at the output end of the lifting mechanism. Multiple telescopic pipes (10) are fixedly installed at the output end of the lifting pipe (14). The top of the lifting pipe (14) is connected to the multiple telescopic pipes (10) through a sliding mechanism.

2. The anti-clogging horizontal air preheater according to claim 1, characterized in that, The lifting mechanism includes an electric push cylinder (4) fixedly installed on the outside of the hot air pipe (1). A lifting plate (18) is fixedly installed at the bottom of the piston rod of the electric push cylinder (4). The lifting plate (18) is located below the hot air pipe (1).

3. A horizontal air preheater for preventing ash blockage according to claim 2, characterized in that, The lifting mechanism also includes two vertical rods (16) fixedly installed at the bottom of the hot air pipe (1). A connecting plate (15) is slidably connected to the outer wall of the vertical rod (16). A spring (17) sleeved with the vertical rod (16) is abutted between the top of the connecting plate (15) and the bottom of the hot air pipe (1). The center of the connecting plate (15) is fixedly connected to the outer wall of the lifting pipe (14). The top bend of the lifting pipe (14) is located in the inner cavity of the hot air pipe (1). A telescopic corrugated pipe is installed at the bottom of the lifting pipe (14).

4. A horizontal air preheater for preventing ash blockage according to claim 3, characterized in that, The guiding mechanism includes guide grooves (7) opened on both sides of the inner wall of the hot air pipe (1). The guide grooves (7) are distributed along the inclined direction of the interception net (6). Sliding blocks (8) are slidably installed on the inner wall of the guide grooves (7). The sliding blocks (8) are fixedly installed at both ends of the soot blowing box (9).

5. A horizontal air preheater for preventing ash blockage according to claim 4, characterized in that, The sliding mechanism includes a fixed plate (12) fixedly installed outside the largest diameter telescopic joint of the multi-section telescopic pipe (10), and a movable plate (11) fixedly installed on the top of the soot blowing box (9). A guide rod (13) is fixedly installed on one side of the movable plate (11) through the fixed plate (12), and the guide rod (13) is slidably connected to the fixed plate (12).

6. A horizontal air preheater for preventing ash blockage according to claim 5, characterized in that, A dust hopper (19) is installed at one bottom end of the hot air duct (1), and a dust discharge valve is installed on the straight section of the dust hopper (19).

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