Flue gas waste heat utilization structure of heat preservation furnace

Abstract

The utility model discloses a heat preservation furnace flue gas waste heat utilization structure, and belongs to the technical field of heat preservation furnace flue gas waste heat utilization. Comprising a flue gas cylinder, a plurality of upper heat conduction plates are fixedly connected to the upper portion of the inner wall of the flue gas cylinder, a plurality of lower heat conduction plates are fixedly connected to the lower portion of the inner wall of the flue gas cylinder, the upper heat conduction plates and the lower heat conduction plates are distributed in a staggered mode, a spiral pipe is arranged in the flue gas cylinder, and one end of the spiral pipe is fixedly connected with a communicated water outlet pipe. A plurality of upper heat-conducting plates and lower heat-conducting plates are mounted at the upper part and the lower part in the flue gas cylinder in a staggered manner, and flue gas flows in the flue gas cylinder along a snakelike flow channel formed by the staggered upper heat-conducting plates and lower heat-conducting plates, so that the residence time of the flue gas in the flue gas is prolonged, and the high-temperature flue gas can be in full contact with the upper heat-conducting plates and the lower heat-conducting plates; heat is transferred to the upper heat conduction plate and the lower heat conduction plate, heat energy of smoke waste heat is fully utilized, and the waste heat recovery efficiency is improved.

Description

Technical Field

[0001] This application relates to the technical field of waste heat utilization of the flue gas of a holding furnace, and more specifically, to a structure for utilizing the waste heat of the flue gas of a holding furnace. Background Art

[0002] The waste heat utilization structure of the flue gas of a holding furnace is a device for recovering the waste heat in the flue gas discharged from the holding furnace. It usually consists of heat exchange components, flue gas channels, etc. This structure can effectively utilize the waste heat of the flue gas, improve the energy utilization efficiency, reduce energy consumption, and at the same time reduce the thermal pollution to the environment;

[0003] When the traditional holding furnace discharges smoke, a large amount of waste heat in the flue gas is usually directly discharged into the atmosphere, resulting in a great waste of energy. The existing waste heat utilization devices cannot fully utilize the heat energy in the flue gas, resulting in a not very good waste heat utilization effect. At the same time, the impurities and dust carried by the flue gas are easy to accumulate inside the device, affecting the flow of the flue gas and the normal operation of the equipment, thereby reducing the heat exchange efficiency and even damaging the equipment, increasing the maintenance cost and the risk of equipment failure.

[0004] In view of this, we propose a structure for utilizing the waste heat of the flue gas of a holding furnace. Utility Model Content

[0005] The purpose of this application is to provide a structure for utilizing the waste heat of the flue gas of a holding furnace, which solves the technical problems in the above background art.

[0006] The technical solution of this application provides a structure for utilizing the waste heat of the flue gas of a holding furnace, including a flue gas cylinder. A plurality of upper heat conduction plates are fixedly connected to the upper part of the inner wall of the flue gas cylinder, and a plurality of lower heat conduction plates are fixedly connected to the lower part of the inner wall of the flue gas cylinder. The upper heat conduction plates and the lower heat conduction plates are staggered. A spiral tube is arranged inside the flue gas cylinder. One end of the spiral tube is fixedly connected to a water outlet pipe that is communicated, and the other end of the spiral tube is fixedly connected to a water inlet pipe that is communicated. The water outlet pipe and the water inlet pipe both extend out of the flue gas cylinder. Heat absorption sleeves are fixedly connected to the outer walls of the water outlet pipe, the water inlet pipe, and the spiral tube.

[0007] Optionally, a filter plate is fixedly connected to one side inside the flue gas cylinder. A rotating shaft is rotatably connected through the filter plate, and a fan blade is fixedly connected to one end of the rotating shaft.

[0008] Optionally, a pair of brush strips are fixedly connected to the outer wall of the end of the rotating shaft away from the fan blade. A fixing plate is fixedly connected to one side of the inner wall of the flue gas cylinder. A high-speed motor is fixedly connected to one side of the fixing plate. The output end of the high-speed motor penetrates through the fixing plate and is fixedly connected to the rotating shaft.

[0009] Optionally, mounting rings are fixedly connected to the outer walls at both ends of the chimney, and a plurality of communication ports are formed in the lower part of the outer wall of the chimney, and the communication ports are located on one side of the lower heat conducting plate and the filter plate.

[0010] Optionally, a communication frame is fixedly connected to the inside of the communication port, and a material guiding plate is fixedly connected to one side of the inner wall of the communication frame.

[0011] Optionally, the lower ends of the plurality of communication frames are fixedly connected to a communicating collecting frame, and a discharging pipe communicating therewith is fixedly connected to one side of the lower end of the collecting frame.

[0012] One or more technical solutions provided in the technical solution of the present application have at least the following technical effects or advantages:

[0013] 1. In the present application, a plurality of upper heat conducting plates and lower heat conducting plates are alternately installed above and below inside the chimney. The flue gas flows in a serpentine flow path formed by the upper heat conducting plates and the lower heat conducting plates inside the chimney, extending the residence time of the flue gas in the chimney, enabling the high-temperature flue gas to fully contact the upper heat conducting plates and the lower heat conducting plates, transferring heat to the upper heat conducting plates and the lower heat conducting plates. Cold water enters the spiral tube, and the heat absorption sleeve on the outer wall of the spiral tube can quickly absorb the heat of the flue gas in the chimney and the heat of the upper heat conducting plates and the lower heat conducting plates to heat the water source in the spiral tube. The setting of the spiral tube increases the length of the water flow out, further extending the heating time, making full use of the heat energy of the flue gas waste heat, and improving the waste heat recovery efficiency.

[0014] 2. Driven by the flowing flue gas, some impurities and dust will impact on the upper heat conducting plates and the lower heat conducting plates, and a small part will fall into the communication frame and then fall into the collecting frame along the material guiding plate, avoiding the random accumulation of impurities and dust in the chimney and affecting the normal operation of the equipment. By rotating the brush strips, the impurities and dust on the filter plate are continuously stirred, preventing the impurities and dust from adsorbing on the filter plate and affecting the ventilation effect. The remaining impurities and dust on one side of the filter plate will also fall into the collecting frame through the communication frame, facilitating the centralized collection and treatment of impurities and dust and keeping the equipment clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the structure for utilizing the waste heat of the flue gas of the heat preservation furnace disclosed in the embodiment of the present application;

[0016] Figure 2 It is a schematic diagram of the internal structure of the chimney of the structure for utilizing the waste heat of the flue gas of the heat preservation furnace disclosed in the embodiment of the present application;

[0017] Figure 3 It is a cross-sectional view of the chimney of the structure for utilizing the waste heat of the flue gas of the heat preservation furnace disclosed in the embodiment of the present application;

[0018] Description of reference numerals in the figure: 1. Flue gas cylinder; 2. Upper heat conducting plate; 3. Lower heat conducting plate; 4. Spiral tube; 5. Water outlet pipe; 6. Water inlet pipe; 7. Heat absorption sleeve; 8. Communication port; 9. Communication frame; 10. Material guiding plate; 11. Collection frame; 12. Discharge pipe; 13. Filter screen plate; 14. Rotating shaft; 15. Fan blade; 16. Brush strip; 17. Fixed plate; 18. High-speed motor; 19. Installation ring. Specific implementation mode

[0019] The following further elaborates on the present application in conjunction with the accompanying drawings of the specification.

[0020] Refer to Figures 1-3 , the embodiment of the present application provides a structure for utilizing the waste heat of the flue gas of an insulating furnace, including a flue gas cylinder 1. A plurality of upper heat conducting plates 2 are fixedly connected to the upper part of the inner wall of the flue gas cylinder 1, and a plurality of lower heat conducting plates 3 are fixedly connected to the lower part of the inner wall of the flue gas cylinder 1. The upper heat conducting plates 2 and the lower heat conducting plates 3 are staggered. A spiral tube 4 is arranged inside the flue gas cylinder 1. One end of the spiral tube 4 is fixedly connected to a water outlet pipe 5 that is communicated, and the other end of the spiral tube 4 is fixedly connected to a water inlet pipe 6 that is communicated. Both the water outlet pipe 5 and the water inlet pipe 6 extend out of the flue gas cylinder 1. Heat absorption sleeves 7 are fixedly connected to the outer walls of the water outlet pipe 5, the water inlet pipe 6, and the spiral tube 4. The flue gas flows in the flue gas cylinder 1 along the serpentine flow path formed by the staggered upper heat conducting plates 2 and lower heat conducting plates 3, extending the residence time of the flue gas in the flue gas 1, enabling the high-temperature flue gas to fully contact the upper heat conducting plates 2 and the lower heat conducting plates 3, and transferring heat to the upper heat conducting plates 2 and the lower heat conducting plates 3. Cold water enters the spiral tube 4, and the heat absorption sleeve 7 on the outer wall of the spiral tube 4 can quickly absorb the heat of the flue gas in the flue gas cylinder 1 and the heat of the upper heat conducting plates 2 and the lower heat conducting plates 3 to heat the water source in the spiral tube 4. The setting of the spiral tube 4 increases the length of the water flow out, further extending the heating time, making full use of the thermal energy of the waste heat of the flue gas, and improving the waste heat recovery efficiency.

[0021] Refer to Figure 2 and Figure 3 , one side inside the flue gas cylinder 1 is fixedly connected with a filter screen plate 13. A rotating shaft 14 is rotatably connected through the inside of the filter screen plate 13. One end of the rotating shaft 14 is fixedly connected with a fan blade 15. A pair of brush strips 16 are fixedly connected to the outer wall of the rotating shaft 14 away from the fan blade 15. One side of the inner wall of the flue gas cylinder 1 is fixedly connected with a fixed plate 17. One side of the fixed plate 17 is fixedly connected with a high-speed motor 18. The output end of the high-speed motor 18 penetrates through the fixed plate 17 and is fixedly connected with the rotating shaft 14. The brush strips 16 rotate continuously to stir the impurities and dust on the filter screen plate 13, preventing the impurities and dust from adsorbing on the filter screen plate 13 and affecting the ventilation effect.

[0022] Refer to Figure 2 and Figure 3, mounting rings 19 are fixedly connected to the outer walls at both ends of the chimney 1. A plurality of communication ports 8 are formed in the lower part of the outer wall of the chimney 1, and the communication ports 8 are located on one side of the lower heat conduction plate 3 and the filter plate 13. A communication frame 9 is fixedly connected inside the communication port 8. A material guiding plate 10 is fixedly connected to one side of the inner wall of the communication frame 9. The lower ends of a plurality of communication frames 9 are fixedly connected to a connected collection frame 11. One side of the lower end of the collection frame 11 is fixedly connected to a connected discharge pipe 12. Driven by the flowing flue gas, some impurities and dust will hit the upper heat conduction plate 2 and the lower heat conduction plate 3, and a small part will fall into the communication frame 9 and then fall into the collection frame 11 along the material guiding plate 10, avoiding the random accumulation of impurity dust in the chimney and affecting the normal operation of the equipment. The remaining impurities and dust on one side of the filter plate 13 will also fall into the collection frame 11 through the communication frame 9, facilitating the centralized collection and treatment of impurity dust and keeping the equipment clean.

[0023] Working principle: During use, first install the mounting rings 19 on the chimney 1 onto the exhaust pipe of the heat preservation furnace and the connecting pipe connected to the exhaust pipe respectively. Then install the cold water pipe onto the water inlet pipe 6 and the pipe for collecting hot water onto the water outlet pipe 5. When there is flue gas discharged, start the high-speed motor 18. The high-speed motor 18 drives the rotation of the output end when working. The rotation of the output end drives the rotation of the rotating shaft 14. The rotation of the rotating shaft 14 drives the fan blades 15 and the brush strips 16 to rotate synchronously. The high-speed rotating fan blades 15 will draw the flue gas into the chimney 1. A plurality of upper heat conduction plates 2 and lower heat conduction plates 3 are alternately installed above and below the inside of the chimney 1. The flue gas will flow along the staggered serpentine flow path formed by the upper heat conduction plate 2 and the lower heat conduction plate 3 until the flue gas is discharged from the filter plate 13. The serpentine flow of the flue gas enables the flue gas to extend the residence time in the chimney 1. At the same time, the high-temperature flue gas hitting the upper heat conduction plate 2 and the lower heat conduction plate 3 can quickly heat the upper heat conduction plate 2 and the lower heat conduction plate 3. Cold water enters the spiral pipe 4 through the water inlet pipe 6. The heat absorption sleeve 7 on the outer wall of the spiral pipe 4 can quickly absorb the heat of the flue gas inside the chimney 1 and the heat of the upper heat conduction plate 2 and the lower heat conduction plate 3, thereby heating the water source inside the spiral pipe 4. The setting of the spiral pipe 4 increases the length of the water flow out, thereby extending the heating time and making full use of the heat energy of the flue gas waste heat. The heated hot water is discharged from the water outlet pipe 5;

[0024] Due to the impurities and dust contained in the flue gas, driven by the flowing flue gas, the impurities and dust will impact on the upper heat conducting plate 2 and the lower heat conducting plate 3. A small part of the impurities and dust will fall into the connecting frame 9, and then fall into the collecting frame 11 along the material guiding plate 10. Finally, the impurities and dust in the flue gas passing through the filter screen plate 13 will be adsorbed on the filter screen plate 13. The rotation of the brush strip 16 will continuously stir the impurities and dust on the filter screen plate 13 to prevent the impurities and dust from being adsorbed on the filter screen plate 13 and affecting the ventilation effect. The impurities and dust on one side of the filter screen plate 13 will also fall into the collecting frame 11 through the connecting frame 9. When the waste heat utilization is completed, turn off all the electrical appliances, open the discharge pipe 12, and collect the dust and impurities.

[0025] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A structure for utilizing waste heat from flue gas of a heat preservation furnace, comprising a flue gas chimney (1), characterized in that: A plurality of upper heat conducting plates (2) are fixedly connected to the upper part of the inner wall of the flue gas chimney (1), and a plurality of lower heat conducting plates (3) are fixedly connected to the lower part of the inner wall of the flue gas chimney (1), and the upper heat conducting plates (2) and the lower heat conducting plates (3) are arranged in a staggered manner. A spiral tube (4) is provided inside the flue gas chimney (1), and one end of the spiral tube (4) is fixedly connected to a connected water outlet pipe (5), and the other end of the spiral tube (4) is fixedly connected to a connected water inlet pipe (6). The water outlet pipe (5) and the water inlet pipe (6) both extend out of the flue gas chimney (1), and the outer walls of the water outlet pipe (5), the water inlet pipe (6) and the spiral tube (4) are all fixedly connected to a heat absorbing sleeve (7).

2. The structure for utilizing waste heat from flue gas of a holding furnace according to claim 1 is characterized in that: A filter plate (13) is fixedly connected to one side of the interior of the smoke pipe (1), a rotating shaft (14) is rotatably connected to the interior of the filter plate (13), and a fan blade (15) is fixedly connected to one end of the rotating shaft (14).

3. The structure for utilizing waste heat from flue gas of a holding furnace according to claim 2 is characterized in that: A pair of brush strips (16) are fixedly connected to the outer wall of the rotating shaft (14) at one end away from the fan blades (15); a fixing plate (17) is fixedly connected to one side of the inner wall of the smoke pipe (1); a high-speed motor (18) is fixedly connected to one side of the fixing plate (17); an output end of the high-speed motor (18) passes through the fixing plate (17) and is fixedly connected to the rotating shaft (14).

4. The structure for utilizing waste heat from flue gas of a holding furnace according to claim 1 is characterized in that: The outer walls at both ends of the flue gas pipe (1) are fixedly connected with mounting rings (19), and a plurality of connecting ports (8) are provided below the outer wall of the flue gas pipe (1), and the connecting ports (8) are located on one side of the lower heat conduction plate (3) and the filter plate (13).

5. The structure for utilizing waste heat from flue gas of a holding furnace according to claim 4 is characterized in that: A communication frame (9) is fixedly connected to the interior of the communication opening (8), and a material guide plate (10) is fixedly connected to one side of the inner wall of the communication frame (9).

6. The structure for utilizing waste heat from flue gas of a holding furnace according to claim 5 is characterized in that: The lower ends of the plurality of communication frames (9) are fixedly connected to a connected collection frame (11), and one side of the lower end of the collection frame (11) is fixedly connected to a connected discharge pipe (12).

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