Ultra-low heat loss air preheater

Abstract

The utility model relates to the technical field of air preheating, and discloses an ultra-low heat loss air preheater which comprises a preheater body, an air inlet pipe is arranged on the side wall of the preheater body, an air outlet pipe is arranged on the side wall of the preheater body, a heat pipe is fixedly connected to the interior of the preheater body, a filter assembly is arranged in the preheater body, and the air inlet pipe and the air outlet pipe are fixedly connected to the interior of the preheater body. A cleaning assembly is arranged on the side wall of the preheater body. The filter assembly comprises a fixing frame, the side wall of the fixing frame is fixedly connected to the interior of the preheater body, a filter plate is arranged in the fixing frame, and a concave hole is formed in the filter plate. According to the utility model, the filter plate is pushed after the bolt is rotated to detach the air inlet pipe, so that the clamping block is extruded to enter the transverse groove of the fixed frame, the limiting block extrudes the spring, the clamping block is separated from the concave hole, and the filter plate can be taken down and replaced after being unfixed, so that the problems that the filter plate needs to be detached and replaced by a tool after being blocked and the operation is tedious are solved, and the replacement convenience of the filter plate is improved.

Description

Technical Field

[0001] This utility model relates to the field of air preheating technology, and in particular to an ultra-low heat loss air preheater. Background Technology

[0002] In various industrial production processes, the rational utilization and efficient conversion of energy has always been a crucial goal. Air preheaters play an indispensable role in this regard, widely used in industries such as thermal power generation, steel smelting, and chemical manufacturing. They preheat the air entering the system by recovering and utilizing waste heat from flue gas. This not only significantly improves the thermal efficiency of the combustion process, allowing for more complete fuel combustion and thus reducing overall fuel consumption and effectively lowering production costs, but also reduces pollutant emissions caused by incomplete energy utilization to a certain extent, playing a positive role in environmental protection.

[0003] Many air preheaters employ relatively conventional filtration devices to handle impurities in the incoming air. These devices typically consist of a simple frame with a filter screen, operating primarily on the principle of sieving. When air flows through the filter, larger impurity particles, unable to pass through the pores, are trapped on the filter surface, thus filtering the air and allowing relatively clean air to enter the preheater. This minimizes the potential adverse effects of impurities on subsequent heat exchange processes, such as reduced heat exchange efficiency or wear on internal components. Regarding heat pipe cleaning, traditional methods rely heavily on periodic manual cleaning. Workers must manually remove accumulated dust and impurities from the heat pipe surface using brushes, shovels, and other tools after the equipment is shut down. This manual cleaning method primarily relies on the principle of physical friction to remove contaminants adhering to the heat pipe surface.

[0004] However, traditional air preheaters suffer from limitations in their air filtration structure and heat pipe cleaning methods during long-term operation. The filter plates easily become clogged with impurities, and traditional disassembly and replacement require tools and are cumbersome, time-consuming, labor-intensive, and may damage the equipment. Simultaneously, dust and impurities easily accumulate on the heat pipe surface, and manual cleaning is inefficient. These two factors interact, leading to decreased air preheater performance and increased maintenance costs. Therefore, an ultra-low heat loss air preheater is proposed to address these problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an ultra-low heat loss air preheater, which aims to improve the problem that in the prior art, the filter plates are clogged by impurities after a long period of time, and the disassembly and replacement require tools, which is quite cumbersome.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An ultra-low heat loss air preheater includes a preheater body, an air inlet pipe and an air outlet pipe provided on the side wall of the preheater body, a heat pipe fixedly connected inside the preheater body, a filter assembly provided inside the preheater body, and a cleaning assembly provided on the side wall of the preheater body.

[0008] The filter assembly includes a fixed frame, the sidewall of which is fixedly connected to the inside of the preheater body. A filter plate is disposed inside the fixed frame, and a recessed hole is formed inside the filter plate. A transverse groove is formed inside the fixed frame, and a locking block is disposed inside the fixed frame. The sidewall of the locking block is slidably connected to the recessed hole and the transverse groove. A fixing post is fixedly connected to the sidewall of the locking block, and a limit block is fixedly connected to the sidewall of the fixing post. The sidewall of the limit block is slidably connected to the transverse groove, and a spring is sleeved on the sidewall of the fixing post.

[0009] As a further description of the above technical solution:

[0010] The cleaning assembly includes a water tank, a rotating shaft is rotatably connected inside the water tank, and an agitator blade is fixedly connected to the side wall of the rotating shaft;

[0011] As a further description of the above technical solution:

[0012] A motor is installed on the side wall of the water tank, and the output end of the motor is connected to the rotating shaft. A water supply pipe is fixedly connected to the side wall of the water tank.

[0013] As a further description of the above technical solution:

[0014] A water pump is installed on the side wall of the water tank, and an input pipe is fixedly connected to the input end of the water pump.

[0015] As a further description of the above technical solution:

[0016] The input pipe is fixedly connected to the inside of the water tank, and the output end of the water pump is fixedly connected to the output pipe.

[0017] As a further description of the above technical solution:

[0018] A fixed pipe is fixedly connected to the side wall of the output pipe, and the side wall of the fixed pipe is fixedly connected to the inside of the preheater body.

[0019] As a further description of the above technical solution:

[0020] A nozzle is fixedly connected to the side wall of the fixed pipe;

[0021] As a further description of the above technical solution:

[0022] One end of the spring is fixedly connected to the side wall of the limiting block, and the other end of the spring is fixedly connected to the inside of the transverse groove.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, the filter plate is prone to clogging after long-term adsorption of impurities. By rotating the bolt to remove the air inlet pipe, pushing the filter plate, the locking block is squeezed into the horizontal groove inside the fixed frame, causing the limiting block to squeeze the spring, and the locking block to disengage from the concave hole. After releasing the fixation of the filter plate, it can be removed and replaced. This solves the problem that the filter plate needs to be disassembled and replaced with tools after being clogged by adsorbing impurities for a long time, which is quite cumbersome. The above technical solution improves the convenience of filter plate replacement.

[0025] 2. In this utility model, starting the water pump causes the input pipe to send water from the water tank into the output pipe, which then sends it to the fixed pipe and the nozzle. The nozzle sprays water onto the heat pipe to remove impurities, and the wastewater is discharged through the drain pipe. After the water in the water tank is used up, water is replenished through the water supply pipe. Then, the motor is started to drive the rotating shaft and the stirring blade to rotate, so that the cleaning agent and water are mixed evenly for later use. This solves the problem of slow preheating speed and low efficiency caused by dust and impurities adhering to the surface of the heat pipe. The above technical solution improves the cleanliness of the heat pipe surface and the preheating speed. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of an ultra-low heat loss air preheater proposed in this utility model;

[0027] Figure 2 This is a schematic diagram of the internal structure of an ultra-low heat loss air preheater proposed in this utility model;

[0028] Figure 3 This is a schematic diagram of the internal structure of the fixed frame of an ultra-low heat loss air preheater proposed in this utility model;

[0029] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0030] Figure 5 This is a schematic diagram of the internal structure of the water tank of an ultra-low heat loss air preheater proposed in this utility model.

[0031] Legend:

[0032] 1. Preheater body; 2. Air inlet pipe; 3. Air outlet pipe; 4. Heat pipe; 5. Fixing frame; 6. Filter plate; 7. Recessed hole; 8. Horizontal groove; 9. Locking block; 10. Limiting block; 11. Fixing column; 12. Spring; 13. Water tank; 14. Rotating shaft; 15. Stirring blade; 16. Motor; 17. Water supply pipe; 18. Water pump; 19. Input pipe; 20. Output pipe; 21. Fixing pipe; 22. Nozzle. Detailed Implementation

[0033] 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.

[0034] Reference Figure 1 - Figure 4 This utility model provides an embodiment of an ultra-low heat loss air preheater, comprising a preheater body 1, an air inlet pipe 2 and an air outlet pipe 3 disposed on the side wall of the preheater body 1, a heat pipe 4 fixedly connected inside the preheater body 1, a filter assembly disposed inside the preheater body 1, and a cleaning assembly disposed on the side wall of the preheater body 1; the filter assembly includes a fixing frame 5, the side wall of the fixing frame 5 being fixedly connected inside the preheater body 1, and a filter plate 6 disposed inside the fixing frame 5, the filter plate 6 being used to filter impurities in the air, and the filter plate 6 having recessed holes 7 inside. The fixed frame 5 has a transverse groove 8 inside, and a locking block 9 is provided inside the fixed frame 5. The locking block 9 is used to fix the filter plate 6. The side wall of the locking block 9 is slidably connected to the recess 7. The side wall of the locking block 9 is slidably connected to the transverse groove 8. A fixing post 11 is fixedly connected to the side wall of the fixing post 11. A limiting block 10 is fixedly connected to the side wall of the fixing post 11. The side wall of the limiting block 10 is slidably connected to the transverse groove 8. A spring 12 is sleeved on the side wall of the fixing post 11. One end of the spring 12 is fixedly connected to the side wall of the limiting block 10, and the other end of the spring 12 is fixedly connected to the transverse groove 8.

[0035] The filter plate 6 is mainly used to filter impurities in the air entering the preheater body 1 from the outside, increasing the cleanliness of the air entering the preheater and preventing impurities from causing wear to the internal components of the preheater body 1 or affecting the heat exchange efficiency. However, after long-term use, the filter plate 6 may become clogged due to excessive adsorption of impurities. When the filter plate 6 needs to be replaced, first remove the air inlet pipe 2 by turning the bolts to expose the interior of the preheater body 1. Then push the filter plate 6 to move it. During the movement, the filter plate 6 squeezes the locking block 9 to move it. The locking block 9 and the concave hole 7 cooperate to fix the filter plate 6. The side wall of the locking block 9 is arc-shaped. When the filter plate 6 moves, the locking block 9 is squeezed and slides out of the concave hole 7. When the locking block 9 is squeezed and moves, the limiting block 10 slides in the transverse groove 8, squeezing the spring 12 and causing it to contract. This allows the locking block 9 to enter the transverse groove 8, releasing the fixation of the filter plate 6. At this time, the filter plate 6 can be removed and replaced to restore the adsorption function of air impurities.

[0036] Reference Figure 1 , Figure 2 and Figure 5 The cleaning assembly includes a water tank 13 for storing cleaning water. A rotating shaft 14 is rotatably connected inside the water tank 13. An agitator 15 is fixedly connected to the side wall of the rotating shaft 14 for mixing cleaning agent and water evenly. A motor 16 is installed on the side wall of the water tank 13, and the output end of the motor 16 is connected to the rotating shaft 14. A water supply pipe 17 is fixedly connected to the side wall of the water tank 13. A water pump 18 is installed on the side wall of the water tank 13. An input pipe 19 is fixedly connected to the input end of the water pump 18, and the side wall of the input pipe 19 is fixedly connected inside the water tank 13. An output pipe 20 is fixedly connected to the output end of the water pump 18. A fixed pipe 21 is fixedly connected to the side wall of the output pipe 20, and the side wall of the fixed pipe 21 is fixedly connected to the inside of the preheater body 1. A nozzle 22 is fixedly connected to the side wall of the fixed pipe 21.

[0037] As a component of the preheater that enables efficient heat exchange, the cleanliness of the heat pipe 4 affects the preheating speed and efficiency. To ensure that the heat pipe 4 maintains good heat exchange performance, its surface needs to be cleaned regularly. By starting the water pump 18, the inlet pipe 19 delivers water from the water tank 13 to the outlet pipe 20. The outlet pipe 20 then delivers the water to the fixed pipe 21, which connects and guides the water flow. The water is then delivered to the nozzles 22, which spray the water onto the surface of the heat pipe 4. The impact force of the water flow effectively removes any adhering substances. Dust and impurities on the surface of heat pipe 4 restore its heat conduction capacity. Wastewater generated during cleaning is discharged through the drain pipe. When the water in water tank 13 is used up, new water is added to water tank 13 through water supply pipe 17. Then, motor 16 is started, which drives rotating shaft 14 to rotate. Stirring blade 15 connected to rotating shaft 14 rotates accordingly. The rotation of stirring blade 15 can make the cleaning agent and water in water tank 13 fully mixed evenly. The prepared cleaning solution can clean the surface of heat pipe 4 more effectively the next time it is used, thus improving the heat exchange efficiency of heat pipe 4.

[0038] Working principle: Over time, the filter plate 6 will become clogged with impurities in the air inside the preheater body 1. The air inlet pipe 2 can be removed by turning the bolts, and then the filter plate 6 can be pushed to move. As the filter plate 6 moves, the locking block 9 is squeezed into the horizontal groove 8 inside the fixed frame 5, which causes the limiting block 10 to squeeze the spring 12. As the locking block 9 enters the horizontal groove 8 and disengages from the concave hole 7, the filter plate 6 can be removed and replaced.

[0039] To improve the cleanliness of the heat pipe 4 surface and increase preheating speed and efficiency, the water pump 18 is started to transport water from the water tank 13 to the output pipe 20 through the input pipe 19, and then from the output pipe 20 to the fixed pipe 21, which in turn delivers the water to the nozzles 22. Several nozzles 22 spray water onto the surface of the heat pipe 4 to remove dust and impurities adhering to its surface. Wastewater is discharged through the drain pipe. When the water in the water tank 13 is used up, it is replenished through the water supply pipe 17. Then, the motor 16 is started to rotate the rotating shaft 14, which drives the stirring blade 15 to rotate, so that the cleaning agent and water in the water tank 13 are mixed evenly for the next use.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An ultra-low heat loss air preheater, comprising a preheater body (1), characterized in that: The preheater body (1) is provided with an air inlet pipe (2) on its side wall, an air outlet pipe (3) on its side wall, a heat pipe (4) is fixedly connected inside the preheater body (1), a filter assembly is provided inside the preheater body (1), and a cleaning assembly is provided on the side wall of the preheater body (1). The filter assembly includes a fixed frame (5), the side wall of which is fixedly connected to the inside of the preheater body (1). A filter plate (6) is provided inside the fixed frame (5). A recessed hole (7) is provided inside the filter plate (6). A transverse groove (8) is provided inside the fixed frame (5). A locking block (9) is provided inside the fixed frame (5). The side wall of the locking block (9) is slidably connected to the inside of the recessed hole (7). The side wall of the locking block (9) is slidably connected to the inside of the transverse groove (8). A fixing post (11) is fixedly connected to the side wall of the locking block (9). A limiting block (10) is fixedly connected to the side wall of the fixing post (11). The side wall of the limiting block (10) is slidably connected to the inside of the transverse groove (8). A spring (12) is sleeved on the side wall of the fixing post (11).

2. The ultra-low heat loss air preheater according to claim 1, characterized in that: The cleaning assembly includes a water tank (13), a rotating shaft (14) is rotatably connected inside the water tank (13), and an agitator (15) is fixedly connected to the side wall of the rotating shaft (14).

3. The ultra-low heat loss air preheater according to claim 2, characterized in that: A motor (16) is provided on the side wall of the water tank (13), and the output end of the motor (16) is connected to the rotating shaft (14). A water supply pipe (17) is fixedly connected to the side wall of the water tank (13).

4. The ultra-low heat loss air preheater according to claim 2, characterized in that: A water pump (18) is provided on the side wall of the water tank (13), and an input pipe (19) is fixedly connected to the input end of the water pump (18).

5. The ultra-low heat loss air preheater according to claim 4, characterized in that: The input pipe (19) is fixedly connected to the side wall of the water tank (13), and the output end of the water pump (18) is fixedly connected to the output pipe (20).

6. The ultra-low heat loss air preheater according to claim 5, characterized in that: The output pipe (20) is fixedly connected to a fixed pipe (21) on its side wall, and the side wall of the fixed pipe (21) is fixedly connected to the inside of the preheater body (1).

7. The ultra-low heat loss air preheater according to claim 6, characterized in that: The nozzle (22) is fixedly connected to the side wall of the fixed pipe (21).

8. The ultra-low heat loss air preheater according to claim 1, characterized in that: One end of the spring (12) is fixedly connected to the side wall of the limiting block (10), and the other end of the spring (12) is fixedly connected to the inside of the transverse groove (8).

Images