Device for recovering waste heat in flue gas

Abstract

The utility model relates to the technical field of waste heat recovery devices, in particular to a device for recovering waste heat in flue gas. The device comprises a recycling box, the inner wall of the recycling box is fixedly connected with a plurality of evenly-distributed coiled pipes, one end of each coiled pipe is fixedly connected with a water inlet pipe, the other end of each coiled pipe is fixedly connected with a water outlet pipe, and the inner wall of the recycling box is provided with a cleaning assembly and a collecting assembly. The cleaning assembly comprises a plurality of evenly-distributed rotating rods arranged on the inner wall of the recycling box, bristles are fixedly connected to the arc faces of the multiple rotating rods, the bristles are made of steel, and a driving mechanism is arranged on the inner wall of the recycling box. The multiple rotating rods move back and forth in the recycling box and rotate at the same time, so that the bristles clean the surface of the coiled pipe, and the effect that the flue gas waste heat recycling efficiency is prevented from being affected due to the fact that dust is attached to the coiled pipe is achieved as far as possible.

Description

TECHNICAL FIELD

[0001] The utility model relates to a waste heat recovery device technical field especially relates to a waste heat recovery device in flue gas. BACKGROUND

[0002] Waste heat recovery device is used for waste heat recovery in flue gas, and the waste heat recovery device is composed of a recovery tank, multiple serpentine pipes, a water inlet pipe and a water outlet pipe. When the waste heat recovery device is used, the recovery tank is installed between a heating furnace and a chimney. After the flue gas is heated by the heating furnace, the flue gas flows into the recovery tank. The water inlet pipe is connected to an external water pipe. The water pump pumps water into the serpentine pipes, which is then heated by the waste heat in the flue gas. Thus, the flue gas is recovered. The heated water is discharged from the water outlet pipe and collected by a water tower. Finally, the flue gas recovered by the waste heat is discharged from the chimney.

[0003] The inventor found in daily work that when the waste heat recovery device is used, the flue gas may still contain a small amount of particles after being heated by the heating furnace. When the flue gas is discharged into the recovery tank, the particles may adhere to the surface of the serpentine pipes and accumulate more and more. This may affect the heat conduction efficiency of the serpentine pipes and further affect the effect of heating and recovering water by the waste heat in the flue gas. SUMMARY

[0004] The utility model discloses a waste heat recovery device in flue gas to solve the problem that in actual use, the flue gas may still contain a small amount of particles after being heated by the heating furnace. When the flue gas is discharged into the recovery tank, the particles may adhere to the surface of the serpentine pipes and accumulate more and more. This may affect the heat conduction efficiency of the serpentine pipes and further affect the effect of heating and recovering water by the waste heat in the flue gas.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a waste heat recovery device in flue gas, comprising a recovery tank, the inner wall of the recovery tank is fixedly connected with multiple evenly distributed serpentine pipes, one end of the multiple serpentine pipes is fixedly connected with a water inlet pipe, the other end of the multiple serpentine pipes is also fixedly connected with a water outlet pipe, the inner wall of the recovery tank is provided with a cleaning assembly and a collecting assembly, the cleaning assembly comprises multiple evenly distributed rotating rods arranged on the inner wall of the recovery tank, the circular arc surface of the multiple rotating rods is fixedly connected with bristles, the bristles are made of steel, and the inner wall of the recovery tank is provided with a driving mechanism.

[0006] The above-mentioned components achieve the following effects: by arranging the cleaning assembly, when the serpentine pipes are cleaned, the multiple rotating rods move back and forth in the recovery tank under the action of the driving mechanism, and the rotating rods rotate at the same time. Thus, the bristles clean the surface of the serpentine pipes, which can avoid the influence of dust adhering to the serpentine pipes on the waste heat recovery efficiency of the flue gas as much as possible.

[0007] Preferably, the driving mechanism comprises a slotted block fixedly connected to the top of the inner wall of the recycling box, the inner wall of the recycling box is provided with mounting rods, the two mounting rods are rotationally connected with the rotating rod, and the upper mounting rod slides in the inner wall of the slotted block.

[0008] The above-mentioned component achieves the effect that the mounting rod moves back and forth in the inner wall of the slotted block, so that the rotating rods move back and forth in the recycling box.

[0009] Preferably, the inner wall of the slotted block is provided with a first lead screw, and the first lead screw is threadedly connected with the mounting rod.

[0010] The above-mentioned component achieves the effect that the first lead screw rotates, so that the mounting rod moves back and forth in the inner wall of the slotted block.

[0011] Preferably, the recycling box is provided on one side with a motor, and the output end of the motor is fixedly connected with the first lead screw.

[0012] The above-mentioned component achieves the effect that the motor is started, and the motor is continuously reversed, so that the first lead screw rotates.

[0013] Preferably, the inner wall of the recycling box is fixedly connected with a rack and an auxiliary rod, the circular arc surface of the rotating rod is fixedly connected with a gear, and the mounting rod slides on the rack.

[0014] The above-mentioned component achieves the effect that when the rotating rod moves, the gear rotates on the rack, so that the rotating shaft rotates.

[0015] Preferably, the rack and the gear are meshingly connected, and the lower mounting rod slides on the circular arc surface of the auxiliary rod.

[0016] The above-mentioned component achieves the effect that the auxiliary rod is arranged to assist the movement of the mounting rod.

[0017] Preferably, the collecting assembly comprises a baffle detachably connected to the bottom of the inner wall of the recycling box, the inner wall of the recycling box is provided on one side with a sliding rail, and the inner wall of the sliding rail is slidably connected with scraping plates on both sides.

[0018] The above-mentioned component achieves the effect that when it is necessary to clean the dust particles in the recycling box, the screws between the baffle and the recycling box are disassembled, and then the scraping plates on both sides of the sliding rail move close to each other, so that the dust is pushed to the middle and falls out, and workers can place a collecting box below to collect.

[0019] Preferably, the inner wall of the sliding rail is provided with a second lead screw, the threads at both ends of the second lead screw are opposite, and the second lead screw is threadedly connected with the scraping plates.

[0020] The above components achieve the following effects: connecting the second lead screw to an external motor causes the second lead screw to rotate, causing the scrapers on both sides of the slide rail to move closer to each other, and a sealing ring is installed between the second lead screw and the recycling box.

[0021] In summary, the beneficial effects of this utility model are as follows:

[0022] In this invention, by setting up a cleaning component, multiple rotating rods move back and forth in the recovery box through a drive mechanism when cleaning the serpentine tube. At the same time, the rotating rods rotate, thereby cleaning the surface of the serpentine tube with bristles. This helps to minimize the impact of dust accumulation on the serpentine tube on the efficiency of flue gas waste heat recovery. It solves the problem that after the flue gas is heated by the furnace, it may still contain a small amount of particles. After being discharged into the recovery box, these particles may adhere to the surface of the serpentine tube. As they accumulate, they may affect the heat conduction efficiency of the serpentine tube, which in turn may affect the effect of flue gas waste heat recovery for water heating. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a three-dimensional structural diagram of the back of the present invention;

[0025] Figure 3 This is a three-dimensional structural diagram of the cross-section of this utility model;

[0026] Figure 4 This utility model Figure 3 An enlarged three-dimensional structural diagram of A in the middle.

[0027] Legend: 1. Recycling bin; 2. Cleaning assembly; 3. Collection assembly; 4. Snake-shaped tube; 5. Inlet pipe; 6. Outlet pipe; 21. Rotating rod; 22. Brush bristles; 23. Drive mechanism; 231. Grooved block; 232. First lead screw; 233. Motor; 234. Mounting rod; 235. Gear; 236. Rack; 237. Auxiliary rod; 31. Baffle; 32. Slide rail; 33. Second lead screw; 34. Scraper. Detailed Implementation

[0028] Reference Figure 1 and Figure 2 as well as Figure 3 As shown, this utility model provides a technical solution: a waste heat recovery device in flue gas includes a recovery box 1, and a plurality of evenly distributed serpentine tubes 4 are fixedly connected to the inner wall of the recovery box 1. One end of the plurality of serpentine tubes 4 is fixedly connected to a water inlet pipe 5, and the other end of the plurality of serpentine tubes 4 is also fixedly connected to a water outlet pipe 6. The inner wall of the recovery box 1 is provided with a cleaning component 2 and a collection component 3.

[0029] The following section will explain the specific settings and functions of Cleanup Component 2 and Collection Component 3.

[0030] Reference Figure 2 and Figure 3 As shown in this embodiment: the cleaning component 2 includes multiple evenly distributed rotating rods 21 disposed on the inner wall of the recycling bin 1. Brush bristles 22 are fixedly connected to the arc surfaces of the multiple rotating rods 21. The brush bristles 22 are made of steel. A drive mechanism 23 is provided on the inner wall of the recycling bin 1. By setting the cleaning component 2, when cleaning the serpentine tube 4, the drive mechanism 23 causes the multiple rotating rods 21 to move back and forth within the recycling bin 1. Simultaneously, the rotating rods 21 rotate, thereby cleaning the surface of the serpentine tube 4 with the brush bristles 22. This effectively avoids the impact of dust adhering to the serpentine tube 4 on the efficiency of flue gas waste heat recovery. The drive mechanism 23 includes a grooved block 231 fixedly connected to the top of the inner wall of the recycling bin 1. An installation rod 234 is provided on the inner wall of the recycling bin 1. Two installation rods 234 are rotatably connected to the rotating rods 21. The upper installation rod 234 slides on the inner wall of the grooved block 231. The installation rod 234 moves back and forth on the inner wall of the grooved block 231, causing the multiple rotating rods 21 to... The device moves back and forth inside the recycling bin 1. A first lead screw 232 is installed on the inner wall of the grooved block 231. The first lead screw 232 is threadedly connected to the mounting rod 234. Rotation of the first lead screw 232 causes the mounting rod 234 to move back and forth within the inner wall of the grooved block 231. A motor 233 is installed on one side of the recycling bin 1. The output end of the motor 233 is fixed to the first lead screw 232. Starting the motor 233 causes it to continuously rotate forward and backward, thus rotating the first lead screw 232. A rack 236 and an auxiliary rod 237 are fixedly connected to the inner wall of the receiving box 1. A gear 235 is fixedly connected to the arc surface of the rotating rod 21. The mounting rod 234 slides on the rack 236. When the rotating rod 21 moves, the gear 235 rotates on the rack 236, thereby causing the rotating shaft to rotate. The rack 236 and the gear 235 are meshed. The lower mounting rod 234 slides on the arc surface of the auxiliary rod 237. By setting the auxiliary rod 237, the mounting rod 234 is assisted in moving.

[0031] Reference Figure 2 and Figure 4As shown in this embodiment: the collection component 3 includes a baffle 31 detachably connected to the bottom of the inner wall of the recycling bin 1. A slide rail 32 is provided on one side of the inner wall of the recycling bin 1. Scrapers 34 are slidably connected to both sides of the inner wall of the slide rail 32. When it is necessary to remove the dust particles from the recycling bin 1, the screws between the baffle 31 and the recycling bin 1 are removed. Then, the scrapers 34 on both sides of the slide rail 32 move closer to each other, pushing the dust to the middle and letting it fall out. Workers can place a collection box below to collect it. A second lead screw 33 is provided on the inner wall of the slide rail 32. The threads at both ends of the second lead screw 33 are opposite. The second lead screw 33 and the scrapers 34 are threadedly connected. A motor is connected to the second lead screw 33 to make the second lead screw 33 rotate, causing the scrapers 34 on both sides of the slide rail 32 to move closer to each other. A sealing ring is provided between the second lead screw 33 and the recycling bin 1.

[0032] Working principle:

[0033] When using the waste heat recovery device, the recovery box 1 is installed between the heating furnace and the chimney. After the flue gas is heated by the heating furnace, it flows into the recovery box 1. The inlet pipe 5 is connected to the external water pipe, so that the water pump pumps water into the serpentine tube 4, where it is heated by the waste heat in the flue gas, thus recovering the flue gas. The heated water exits from the outlet pipe 6 and is collected by the water collection tower. Finally, the flue gas with recovered waste heat is discharged from the chimney. When cleaning the serpentine tube 4, the motor 233 is started, and the motor 233 continuously rotates forward and backward, causing the first lead screw 232 to rotate. This causes the mounting rod 234 to move back and forth on the inner wall of the grooved block 231, causing multiple rotating rods 21 to move back and forth within the recovery box 1. At the same time, as the rotating rods 21 move, they cause... Gear 235 rotates on rack 236, causing the shaft to rotate, thus cleaning the surface of the serpentine tube 4 with bristles 22. This helps to minimize the impact of dust accumulation on the serpentine tube 4 on the efficiency of flue gas waste heat recovery. By setting an auxiliary rod 237 to assist the movement of the mounting rod 234, when it is necessary to remove the dust particles from the recovery box 1, the screws between the baffle 31 and the recovery box 1 are removed, and the second lead screw 33 is connected to an external motor, causing the second lead screw 33 to rotate. This causes the scrapers 34 on both sides of the slide rail 32 to move closer to each other. A sealing ring is set between the second lead screw 33 and the recovery box 1, allowing the dust to be pushed to the middle and fall out. Workers can place a collection box below to collect the dust.

[0034] It should be noted that all motors described in this application are equipped with heat insulation.

[0035] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may use the disclosed technical content to make changes or modifications to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the scope of the utility model's technical solution, still fall within the protection scope of this utility model's technical solution. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through specific circumstances.

Claims

1. A waste heat recovery device for flue gas, comprising a recovery box (1), characterized in that: The inner wall of the recycling bin (1) is fixedly connected with a plurality of evenly distributed serpentine tubes (4). One end of each serpentine tube (4) is fixedly connected with a water inlet pipe (5), and the other end of each serpentine tube (4) is fixedly connected with a water outlet pipe (6). The inner wall of the recycling bin (1) is provided with a cleaning component (2) and a collection component (3). The cleaning component (2) includes a plurality of evenly distributed rotating rods (21) arranged on the inner wall of the recycling bin (1). The arc surfaces of the rotating rods (21) are fixedly connected with bristles (22), which are made of steel. The inner wall of the recycling bin (1) is provided with a driving mechanism (23). The driving mechanism (23) includes a grooved block (231) fixedly connected to the top of the inner wall of the recycling bin (1). The inner wall of the recycling bin (1) is provided with an installation rod (234). The mounting rod (234) and the rotating rod (21) are rotatably connected. The upper mounting rod (234) slides on the inner wall of the grooved block (231). The inner wall of the grooved block (231) is provided with a first lead screw (232), which is threadedly connected to the mounting rod (234). A motor (233) is installed on one side of the recycling box (1), and the output end of the motor (233) is fixed to the first lead screw (232). A rack (236) and an auxiliary rod (237) are fixedly connected to the inner wall of the recycling box (1). A gear (235) is fixedly connected to the arc surface of the rotating rod (21), and the mounting rod (234) slides on the rack (236). The rack (236) and the gear (235) are meshed and connected, and the lower mounting rod (234) slides on the arc surface of the auxiliary rod (237).

2. The waste heat recovery device in flue gas according to claim 1, characterized in that: The collection component (3) includes a baffle (31) detachably connected to the bottom of the inner wall of the recycling bin (1). A slide rail (32) is provided on one side of the inner wall of the recycling bin (1), and scrapers (34) are slidably connected to both sides of the inner wall of the slide rail (32).

3. The waste heat recovery device in flue gas according to claim 2, characterized in that: The inner wall of the slide rail (32) is provided with a second lead screw (33), the threads at both ends of the second lead screw (33) are opposite, and the second lead screw (33) is threadedly connected to the scraper (34).

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