Flue gas waste heat recovery device

Abstract

The utility model discloses a flue gas waste heat recovery device, which relates to the technical field of waste heat recovery and comprises a waste heat box, a flue gas pipe is fixedly arranged on the waste heat box, a spiral waste heat recovery pipe is wound on the outer wall of the flue gas pipe, a liquid inlet pipe and a liquid outlet pipe are respectively and fixedly arranged at two ends of the waste heat recovery pipe, and the liquid inlet pipe and the liquid outlet pipe are communicated with each other. A second mounting plate is fixedly connected to one end of the flue gas pipe, a rotating shaft is rotatably connected to one side of the second mounting plate, a plurality of rotating fan blades are fixedly connected to one end of the rotating shaft, a second rotating plate is fixedly connected to the other end of the rotating shaft, and scraping plates are arranged at the top and the bottom of one side of the second rotating plate; the top of the scraping plate is in an arc shape, and the scraping plate is attached to the smoke pipe. Impurities on the inner wall of the flue gas pipe can be scraped, the situation that the impurities adhere to the inner wall of the flue gas pipe, and consequently the heat conductivity of the flue gas pipe is affected is avoided, and therefore the waste heat recovery efficiency is improved.

Description

TECHNICAL FIELD

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

[0002] The flue gas waste heat recovery device is a kind of high-efficiency energy-saving equipment, and its core working principle is to use heat exchanger to transfer the waste heat in waste gas to the medium needing heating, such as water, air and the like, to achieve the purpose of energy saving, when waste gas passes through heat exchanger, the waste heat in waste gas is absorbed by the medium in heat exchanger, to make the medium temperature rise. The medium after rising can be used to heat other equipment or for other purposes, such as preheating air or fuel entering heating furnace, heating boiler feed water and the like.

[0003] The flue gas waste heat recovery device disclosed in the publication No.CN220648303U includes a heat exchange box, a gas guide pipe, a first driving device, a cleaning brush and a second driving device.The gas guide pipe is rotatably installed on the opposite two side walls of the heat exchange box, and the two ends of the gas guide pipe extend to the outside of the heat exchange box.The first driving device is installed outside the heat exchange box and is transmissionally connected with the gas guide pipe to drive the rotation of the gas guide pipe.The cleaning brush includes a brush rod and a brush head, the brush head is arranged in the heat exchange box and is used to clean the outer wall surface of the gas guide pipe, one end of the brush rod is fixedly connected with the brush head, and the other end extends to the outside of the heat exchange box.The second driving device is installed outside the heat exchange box and is transmissionally connected with the brush rod to drive the rotation of the brush rod around its own axis.Through the above technical scheme, the flue gas waste heat recovery device provided by the publication can effectively clean the scale and improve the heat exchange efficiency.

[0004] After the flue gas is cooled, a large amount of impurities will be produced, including flue gas ash particles, compounds (such as ammonium fluoroborate, ammonium fluoride, boric acid and ammonium fluorosilicate, etc.) and acidic substances, etc., but similar to the above-mentioned flue gas waste heat recovery device, it is inconvenient to clean the impurities in the flue gas pipe during use, and the impurities will adhere to the inner wall of the flue gas pipe after long-term use, thereby easily reducing the heat conduction performance of the flue gas pipe, thereby reducing the flue gas waste heat recovery efficiency. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the shortcomings in the prior art and provides a flue gas waste heat recovery device.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] A flue gas waste heat recovery device, comprising a waste heat tank, a flue gas pipe is fixedly arranged on the waste heat tank, a spiral waste heat recovery pipe is wound around the outer wall of the flue gas pipe, liquid inlet pipes and liquid outlet pipes are fixedly arranged at the two ends of the waste heat recovery pipe respectively, a second mounting plate is fixedly connected to one end of the flue gas pipe, a rotating shaft is rotatably connected to one side of the second mounting plate, a plurality of rotating vanes are fixedly connected to one end of the rotating shaft, a second rotating plate is fixedly connected to the other end of the rotating shaft, scrapers are arranged on the top and bottom of one side of the second rotating plate, the top of the scraper is arc-shaped, and the scraper is attached to the flue gas pipe.

[0008] The utility model further sets up, one end of flue gas pipe is fixedly connected with first mounting plate, one side of first mounting plate is rotatably connected with first rotating plate, and the scraper is fixedly arranged between the first rotating plate.

[0009] The utility model further sets up, the bottom of flue gas pipe is provided with installation slot, and the inner wall of installation slot is inserted with collection frame.

[0010] The utility model further sets up, the top and bottom of one side of first rotating plate and second rotating plate are provided with limiting slot, and the both ends of scraper are provided with movable slot, and the inner wall of movable slot is slidably provided with the limiting block that is matched with limiting slot.

[0011] The utility model further sets up, and the limiting spring is fixedly arranged between the limiting block and movable slot.

[0012] The utility model further sets up, and one side of limiting block away from limiting spring is inclined design.

[0013] The utility model further sets up, and the inner wall of one side away from limiting block of limiting slot is provided with screw hole, and the inner wall of screw hole is connected with threaded rod through thread.

[0014] The utility model further sets up, and the both ends of flue gas pipe are fixedly provided with connecting flange, and the outer wall of one end of waste heat tank is fixedly provided with control panel.

[0015] The utility model has the advantages that:

[0016] 1、The flue gas waste heat recovery device is used, and the flue gas is communicated with the flue gas pipe, the other end of the flue gas pipe is connected with the exhaust pipe, and is installed through the connecting flange, when the flue gas passes through the flue gas pipe, the rotating vane is driven to rotate, thereby driving the rotating shaft and the second rotating plate to rotate, the two scrapers are driven to rotate through the second rotating plate, and the impurities on the inner wall of the flue gas pipe are scraped, so that the impurities are adhered to the inner wall of the flue gas pipe, and the heat conductivity of the flue gas pipe is affected, thereby increasing the waste heat recovery efficiency.

[0017] 2、The flue gas waste heat recovery device, by setting up collecting frame and installation slot, the impurities scraped by the scraper fall into the collecting frame under the action of gravity, and the workers can regularly disassemble the exhaust pipe and pull out the collecting frame through the installation slot for cleaning.

[0018] 3、The flue gas waste heat recovery device, when the scraper needs to be replaced after long-term use, the threaded rod can be rotated to make the threaded rod extrude the limiting block to shrink into the movable groove, at which time the scraper can be taken out, during installation, the scraper is inserted between the first rotating plate and the second rotating plate, the first rotating plate and the second rotating plate extrude the inclined surface of the limiting block to shrink into the movable groove, then, under the elastic force of the limiting spring, the limiting block is driven into the limiting groove, thereby completing the installation of the scraper, and achieving the purpose of facilitating the installation and disassembly of the scraper. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a three-dimensional structure schematic view of the whole of the flue gas waste heat recovery device.

[0020] Figure 2 It is a three-dimensional structure schematic view of the waste heat recovery pipe and the waste heat tank of the flue gas waste heat recovery device.

[0021] Figure 3 It is a three-dimensional structure schematic view of the flue gas pipe of the flue gas waste heat recovery device.

[0022] Figure 4 It is a three-dimensional structure schematic view of the first rotating plate and the scraper of the flue gas waste heat recovery device.

[0023] Figure 5 It is a local front cross-sectional structure schematic view of the limiting block and the limiting spring of the flue gas waste heat recovery device.

[0024] In the figure: 1, waste heat tank; 2, control panel; 3, flue gas pipe; 4, connecting flange; 5, waste heat recovery pipe; 6, liquid inlet pipe; 7, liquid outlet pipe; 8, first mounting plate; 9, first rotating plate; 10, installation slot; 11, collecting frame; 12, second mounting plate; 13, rotating fan blade; 14, rotating shaft; 15, second rotating plate; 16, scraper; 17, threaded hole; 18, limiting groove; 19, movable groove; 20, limiting spring; 21, limiting block; 22, threaded rod. DETAILED DESCRIPTION

[0025] The technical scheme of the patent will be further described in detail in combination with specific implementation manners.

[0026] Embodiments of the present patent are described below in detail with reference to examples thereof illustrated in the accompanying drawings, wherein like or similar elements or elements having the same or similar functions are denoted by the same or similar reference numerals throughout the drawings. The embodiments described below by reference to the drawings are exemplary only, and are merely intended to explain the present patent, and cannot be understood as limiting the present patent.

[0027] In the description of the present patent, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present patent and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present patent.

[0028] In the description of the present patent, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "setting" should be understood broadly, for example, it can be fixedly connected, set, or detachably connected, set, or integrally connected, set. For those skilled in the art, the specific meaning of the above terms in the present patent can be understood according to the specific circumstances.

[0029] Referring to Figures 1-4 A flue gas waste heat recovery device, comprising a waste heat tank 1, a flue gas pipe 3 is fixedly arranged on the waste heat tank 1, a waste heat recovery pipe 5 in a spiral shape is wound around the outer wall of the flue gas pipe 3, a liquid inlet pipe 6 and a liquid outlet pipe 7 are fixedly arranged at both ends of the waste heat recovery pipe 5 respectively, one end of the flue gas pipe 3 is fixedly connected with a second mounting plate 12, one side of the second mounting plate 12 is rotatably connected with a rotating shaft 14, one end of the rotating shaft 14 is fixedly connected with a plurality of rotating vanes 13, the other end of the rotating shaft 14 is fixedly connected with a second rotating plate 15, the top and the bottom of one side of the second rotating plate 15 are both provided with a scraper 16, the top of the scraper 16 is arc-shaped, and the scraper 16 is attached to the flue gas pipe 3.

[0030] Referring to Figure 3 And Figure 4 The other end of the flue gas pipe 3 is fixedly connected with a first mounting plate 8, one side of the first mounting plate 8 is rotatably connected with a first rotating plate 9, the scraper 16 is fixedly arranged between the first rotating plate 9, through the first mounting plate 8 and the first rotating plate 9, the stability of the rotation of the scraper 16 is increased; the bottom of the flue gas pipe 3 is provided with a mounting slot 10, the inner wall of the mounting slot 10 is inserted with a collecting frame 11, through the collecting frame 11, the impurities can be conveniently collected.

[0031] Referring to Figure 4 And Figure 5The first rotating plate 9 and the second rotating plate 15 each have a limiting groove 18 on their top and bottom sides. The scraper 16 has movable grooves 19 on both ends. A limiting block 21 that matches the limiting groove 18 is slidably provided on the inner wall of the movable groove 19. The limiting block 21 and the limiting groove 18 facilitate the installation and removal of the scraper 16. A limiting spring 20 is fixedly provided between the limiting block 21 and the movable groove 19. The elastic force of the limiting spring 20 facilitates the pushing of the limiting block 21 into the limiting groove 18. The side of the limiting block 21 away from the limiting spring 20 is inclined. The inclined design facilitates the first rotating plate 9 and the second rotating plate 15 to squeeze the limiting block 21 and retract it into the movable groove 19. A threaded hole 17 is provided on the inner wall of the limiting groove 18 away from the limiting block 21. A threaded rod 22 is threadedly connected to the inner wall of the threaded hole 17. The threaded rod 22 and the threaded hole 17 facilitate the removal of the scraper 16.

[0032] Reference Figure 1 Both ends of the flue gas pipe 3 are fixedly equipped with connecting flanges 4, and one end of the waste heat box 1 is fixedly equipped with a control panel 2. The connecting flanges 4 facilitate the connection of the flue gas pipe 3 with the flue gas conveying pipe and the exhaust pipe.

[0033] Working principle: When in use, the flue gas is connected to the flue gas pipe 3, and the other end of the flue gas pipe 3 is connected to the exhaust pipe and installed through the connecting flange 4. When the flue gas passes through the flue gas pipe 3, it will drive the rotating fan blade 13 to rotate, thereby driving the rotating shaft 14 and the second rotating plate 15 to rotate. The second rotating plate 15 drives the two scrapers 16 to rotate, scraping away impurities on the inner wall of the flue gas pipe 3, preventing impurities from adhering to the inner wall of the flue gas pipe 3 and affecting the thermal conductivity of the flue gas pipe 3, thereby increasing the waste heat recovery efficiency.

[0034] 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 flue gas waste heat recovery device, comprising a waste heat box (1), characterized in that, A flue gas pipe (3) is fixedly installed on the waste heat box (1). A spiral waste heat recovery pipe (5) is wound around the outer wall of the flue gas pipe (3). An inlet pipe (6) and an outlet pipe (7) are fixedly installed at both ends of the waste heat recovery pipe (5). A second mounting plate (12) is fixedly connected to one end of the flue gas pipe (3). A rotating shaft (14) is rotatably connected to one side of the second mounting plate (12). A plurality of rotating fan blades (13) are fixedly connected to one end of the rotating shaft (14). A second rotating plate (15) is fixedly connected to the other end of the rotating shaft (14). Scrapers (16) are provided at the top and bottom of one side of the second rotating plate (15). The top of the scraper (16) is arc-shaped and the scraper (16) is in contact with the flue gas pipe (3).

2. The flue gas waste heat recovery device according to claim 1, characterized in that, The other end of the flue pipe (3) is fixedly connected to a first mounting plate (8), and a first rotating plate (9) is rotatably connected to one side of the first mounting plate (8). The scraper (16) is fixedly disposed between the scraper (16) and the first rotating plate (9).

3. The flue gas waste heat recovery device according to claim 1, characterized in that, The bottom of the flue pipe (3) is provided with an installation slot (10), and a collection frame (11) is inserted into the inner wall of the installation slot (10).

4. The flue gas waste heat recovery device according to claim 2, characterized in that, Limiting grooves (18) are provided on the top and bottom of one side of the first rotating plate (9) and the second rotating plate (15). Movable grooves (19) are provided at both ends of the scraper (16). A limiting block (21) adapted to the limiting groove (18) is slidably provided on the inner wall of the movable groove (19).

5. A flue gas waste heat recovery device according to claim 4, characterized in that, A limit spring (20) is fixedly provided between the limiting block (21) and the movable groove (19).

6. The flue gas waste heat recovery device according to claim 5, characterized in that, The side of the limiting block (21) away from the limiting spring (20) is designed to be inclined.

7. A flue gas waste heat recovery device according to claim 6, characterized in that, The inner wall of the limiting groove (18) away from the limiting block (21) is provided with a threaded hole (17), and the inner wall of the threaded hole (17) is connected to a threaded rod (22) by a thread.

8. The flue gas waste heat recovery device according to claim 1, characterized in that, Both ends of the flue gas pipe (3) are fixedly provided with connecting flanges (4), and a control panel (2) is fixedly provided on the outer wall of one end of the waste heat box (1).

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