Flue gas waste heat recycling device

Abstract

The utility model discloses a flue gas waste heat recycling device which comprises a bottom box, a middle box is arranged at the upper end of the bottom box, an upper cover is detachably arranged on the middle box, a gas inlet pipe is arranged at the side end of the bottom box, an exhaust pipe is fixedly arranged on the upper cover, an igniter is fixedly arranged in the bottom box, and a gas outlet pipe is fixedly arranged on the bottom box. A first heat exchange structure is arranged in the middle box, and heat in flue gas is absorbed through the first heat exchange structure; a first heat exchange structure is arranged at the upper end of the upper cover and comprises a heat storage body, a first exchange pipe and a first heat conduction piece, the heat storage body is arranged in the middle box, and a second heat exchange structure is arranged at the upper end of the upper cover and comprises a second exchange pipe, a second heat conduction piece and a plurality of water storage tanks; and the heat of the flue gas is absorbed through the second exchange structure.

Description

Technical Field

[0001] The utility model relates to the field of flue gas treatment devices, and more specifically, to a flue gas waste heat recovery and utilization device. Background Art

[0002] In the process of industrial production, with the combustion of fossil fuels and the production of chemical products, a large amount of flue gas and waste gas will be generated. The flue gas will carry a large amount of heat, dust, particulate matter and other substances. When treating the flue gas, it is often necessary to use a flue gas waste heat recovery and utilization device to recover the heat in the flue gas. When recovering the heat in the flue gas, the waste heat of the flue gas and cold water are often used alternately to achieve heat conduction, thereby recovering the heat in the flue gas. Since there are still a large amount of dust and particles in the flue gas, the existing recovery and utilization devices are unable to process the substances in the flue gas, which will have an impact on the environment after the flue gas is discharged. At the same time, the existing waste heat recovery and utilization devices only recover the waste heat in the flue gas through a separate heat transfer structure. Due to the flue gas flow rate, etc., part of the flue gas leaves the heat transfer structure without complete heat dissipation, and the recovery and utilization of the waste heat is not complete. Utility Model Content

[0003] (1) Technical problems solved

[0004] In view of the problems existing in the prior art, the present invention provides a flue gas waste heat recovery and utilization device to solve the technical problems mentioned in the background technology.

[0005] (2) Technical solution

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a flue gas waste heat recovery and utilization device, comprising a bottom box, an intermediate box provided at the upper end of the bottom box, an upper cover detachably provided on the intermediate box, an air intake pipe provided on the side end of the bottom box, an exhaust pipe fixedly provided on the upper cover, an igniter fixedly provided inside the bottom box, and a first heat exchange structure provided inside the intermediate box, which absorbs heat from the flue gas through the first heat exchange structure;

[0007] The first heat exchange structure includes a heat storage body, a first exchange tube and a first heat conducting plate. The heat storage body is arranged inside the intermediate box. The upper end of the upper cover is provided with a second heat exchange structure. The second heat exchange structure includes a second exchange tube, a second heat conducting plate and a water storage tank. There are multiple water storage tanks, and the heat of the flue gas is absorbed by the second exchange structure.

[0008] The utility model is further configured such that a mounting bracket is fixedly provided inside the intermediate box, the heat storage body is provided on the mounting bracket, a clamping block is fixedly provided on the side end of the heat storage body, and multiple first exchange tubes and first heat conducting plates are provided, thereby facilitating the installation of the heat storage body on the mounting bracket.

[0009] The utility model is further configured such that the block and the mounting bracket cooperate with each other, the first heat conducting plate is sleeved and installed on the outside of the first exchange tube, and the first exchange tube is fixedly arranged on the intermediate box. The contact area between the first exchange tube and the flue gas is increased by the first heat conducting plate, thereby facilitating heat transfer.

[0010] The utility model is further configured such that the water storage tank is fixedly arranged on the upper cover, a cover plate is detachably provided on the upper end of the water storage tank, a plurality of second exchange tubes and second heat conducting plates are provided, an air inlet is provided on the cover plate, and the air inlet is connected to the exhaust pipe, thereby facilitating the entry of smoke from the intermediate box into the water storage tank.

[0011] The present invention is further configured such that the second exchange tube is arranged inside the water storage tank, the second heat conducting plate is fixedly arranged on the outside of the second exchange tube, a water outlet is opened at the side end of the water storage tank, and a side baffle is detachably provided at the side end of the water storage tank, so that the water outlet is blocked by the side baffle. When cleaning the water storage tank, the baffle is removed and the debris accumulated in the water storage tank is taken out from the water outlet.

[0012] The utility model is further configured such that a plurality of side baffles are provided, the side baffles are bolted to the water storage tank, a water blocking block is fixedly provided on the side baffles, the water blocking block cooperates with the water outlet, and water loss is reduced through the water blocking block.

[0013] The utility model is further configured such that an exhaust port is provided on the upper end of the cover plate, and a plurality of exhaust ports are provided. The cover plate is bolted to the water storage tank, a sealing block is fixedly provided on the cover plate, and a sealing groove cooperating with the sealing block is provided on the side wall of the water storage tank, thereby reducing water overflow.

[0014] The utility model is further configured such that the middle box and the bottom box are bolted together, a fan is fixedly provided on the side end of the bottom box, a connecting pipe is provided between the fan and the bottom box, the bottom box and the fan are connected through the connecting pipe, and air is blown into the bottom box through the fan.

[0015] (3) Beneficial effects

[0016] Compared with the existing technology, the utility model provides a flue gas waste heat recovery and utilization device, which has the following beneficial effects:

[0017] 1. The utility model sets a water storage tank at the upper end of the upper cover. When the flue gas enters the water storage tank from the middle box through the exhaust pipe, the exhaust pipe is connected to the water in the water storage tank. The water placed in the water storage tank absorbs and purifies the particulate matter and water-soluble substances in the flue gas, thereby finally treating the flue gas with water, making it easier for the flue gas to be discharged into the air and protecting the environment.

[0018] 2. The utility model sets a first heat exchange structure in the middle box and a second heat exchange structure on the upper cover. When the flue gas enters the middle box, the gas passes through the heat storage body set on the mounting frame in the middle box. The heat storage body absorbs the heat in the flue gas and stores the heat in the heat storage body. At the same time, the liquid or gas to be heated is passed into the first exchange tube. When the substance to be heated enters the middle box through the first exchange tube, the contact area with the flue gas is increased through the first heat conducting plate, so that the heat is conducted to the substance in the first exchange tube along the first heat conducting plate, thereby realizing heat recovery. When the flue gas enters the water storage tank, it will heat the water in the water storage tank, and the substance to be heated will be passed into the second exchange tube. The heat will be conducted to the substance to be heated through the second heat conducting plate set on the second exchange tube, thereby fully utilizing the heat in the flue gas through the first heat exchange structure and the second heat exchange structure.

[0019] 3. The utility model sets a fan at the side end of the bottom box and an igniter inside the bottom box. When there are unburned substances in the flue gas, oxygen is blown into the bottom box through the fan to mix the oxygen and the flue gas in the bottom box. After mixing, the flue gas is ignited by the igniter, thereby burning the unburned substances in the flue gas and releasing heat during combustion, thereby facilitating the full recovery and utilization of energy in the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a flue gas waste heat recovery and utilization device;

[0021] Figure 2 This is a structural diagram of a bottom box of a flue gas waste heat recovery and utilization device;

[0022] Figure 3 This is a schematic diagram of the internal structure of an intermediate box of a flue gas waste heat recovery and utilization device;

[0023] Figure 4 This is a schematic structural diagram of an upper cover of a flue gas waste heat recovery and utilization device;

[0024] Figure 5 The figure is a schematic diagram of the coordinated structure of a water storage tank, side baffles and cover plate of a flue gas waste heat recovery and utilization device.

[0025] In the figure: 1. bottom box; 2. middle box; 3. upper cover; 4. air inlet pipe; 5. exhaust pipe; 6. igniter; 7. heat storage body; 8. first exchange tube; 9. first heat conducting plate; 10. second exchange tube; 11. second heat conducting plate; 12. water storage tank; 13. mounting frame; 14. block; 15. cover plate; 16. air inlet; 17. water outlet; 18. side baffle; 19. water blocking block; 20. exhaust port; 21. sealing block; 22. sealing groove; 23. fan; 24. connecting pipe. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0028] In the present invention, unless otherwise specified, directions such as "up" and "down" are usually relative to the directions shown in the drawings, or relative to the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "left" and "right" are usually relative to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned direction words are not used to limit the present invention.

[0029] See also Figure 1-5 A flue gas waste heat recovery and utilization device includes a bottom box 1, which is characterized in that: an intermediate box 2 is provided at the upper end of the bottom box 1, an upper cover 3 is detachably provided on the intermediate box 2, an air intake pipe 4 is provided on the side end of the bottom box 1, an exhaust pipe 5 is fixedly provided on the upper cover 3, an igniter 6 is fixedly provided inside the bottom box 1, and a first heat exchange structure is provided inside the intermediate box 2;

[0030] The first heat exchange structure includes a heat storage body 7, a first exchange tube 8 and a first heat conducting plate 9. The heat storage body 7 is arranged inside the intermediate box 2. The upper end of the upper cover 3 is provided with a second heat exchange structure. The second heat exchange structure includes a second exchange tube 10, a second heat conducting plate 11 and a water storage tank 12. There are multiple water storage tanks 12.

[0031] In this embodiment, the main structure of the entire recycling device is formed by the bottom box 1, the middle box 2 and the upper cover 3, and heat recovery is achieved through the first heat exchange structure.

[0032] More specifically, the second heat exchange structure is used to utilize the remaining heat in the flue gas and purify the dust or particulate matter in the flue gas.

[0033] See also Figure 1-Figure 5 As an implementation method for recovering waste heat in the intermediate box 2: a mounting frame 13 is fixedly provided inside the intermediate box 2, the heat storage body 7 is provided on the mounting frame 13, a clamping block 14 is fixedly provided on the side end of the heat storage body 7, a plurality of first exchange tubes 8 and first heat conducting sheets 9 are provided, the clamping block 14 cooperates with the mounting frame 13, the first heat conducting sheet 9 is sleeved and installed on the outside of the first exchange tube 8, the first exchange tube 8 is fixedly provided on the intermediate box 2, the intermediate box 2 and the bottom box 1 are bolted together, a fan 23 is fixedly provided on the side end of the bottom box 1, a connecting pipe 24 is provided between the fan 23 and the bottom box 1, and the bottom box 1 and the fan 23 are connected through the connecting pipe 24;

[0034] Specifically, after the flue gas enters the intermediate box 2, the gas passes through the heat storage body 7 set on the mounting frame 13 in the intermediate box 2. The heat storage body 7 absorbs the heat in the flue gas and stores the heat in the heat storage body 7. At the same time, the liquid or gas to be heated is introduced into the first exchange tube 8. When the substance to be heated enters the intermediate box 2 through the first exchange tube 8, the contact area with the flue gas is increased through the first heat conducting plate 9, so that the heat is conducted along the first heat conducting plate 9 to the substance in the first exchange tube 8, thereby realizing heat recovery.

[0035] Please refer to Figure 1-5 As an implementation method for waste heat recovery on the upper cover 3: the water storage tank 12 is fixedly arranged on the upper cover 3, and a cover plate 15 is detachably provided on the upper end of the water storage tank 12. The second exchange tube 10 and the second heat conducting plate 11 are both provided with a plurality of them. An air inlet 16 is provided on the cover plate 15, and the air inlet 16 is connected to the exhaust pipe 5. The second exchange tube 10 is arranged inside the water storage tank 12, and the second heat conducting plate 11 is fixedly arranged on the outside of the second exchange tube 10. A water outlet 17 is provided on the side end of the water storage tank 12. 2 is detachably provided with a side baffle 18, a plurality of side baffles 18 are provided, the side baffle 18 is bolted to the water storage tank 12, a water blocking block 19 is fixedly provided on the side baffle 18, the water blocking block 19 cooperates with the water outlet 17, an exhaust port 20 is provided at the upper end of the cover plate 15, a plurality of exhaust ports 20 are provided, the cover plate 15 is bolted to the water storage tank 12, a sealing block 21 is fixedly provided on the cover plate 15, and a sealing groove 22 that cooperates with the sealing block 21 is provided on the side wall of the water storage tank 12;

[0036] Specifically, when the flue gas enters the water storage tank 12, the water in the water storage tank 12 will be heated, and the substance to be heated will be passed into the second exchange tube 10, and the heat will be transferred to the substance to be heated through the second heat conducting plate 11 provided on the second exchange tube 10.

[0037] In summary, when used as a whole:

[0038] When the flue gas enters the bottom box 1, the flue gas is passed into the bottom box 1 through the air inlet pipe 4. When there are unburned substances in the flue gas, oxygen is blown into the bottom box 1 through the fan 23, so that the oxygen and the flue gas are mixed in the bottom box 1. After mixing, the flue gas is ignited by the igniter 6, thereby burning the unburned substances in the flue gas and releasing heat during combustion.

[0039] When the heat of the flue gas is being recovered and utilized, the gas passes through the heat storage body 7 provided on the mounting frame 13 in the intermediate box 2. The heat storage body 7 absorbs the heat in the flue gas and stores the heat in the heat storage body 7. At the same time, the liquid or gas to be heated is passed into the first exchange tube 8. When the substance to be heated enters the intermediate box 2 through the first exchange tube 8, the contact area with the flue gas is increased through the first heat conducting plate 9, so that the heat is conducted to the substance in the first exchange tube 8 along the first heat conducting plate 9. The flue gas enters the cover plate 15 through the exhaust pipe 5 provided on the upper cover 3, and then enters the water storage tank 12. When the flue gas enters the water storage tank 12, it will heat the water in the water storage tank 12 and pass the substance to be heated into the second exchange tube 10. The heat is conducted to the substance to be heated through the second heat conducting plate 11 provided on the second exchange tube 10. At the same time, the particulate matter and water-soluble substances in the flue gas are absorbed and purified by the water placed in the water storage tank 12, thereby achieving the purification of the flue gas.

[0040] When the heat stored in the heat storage body 7 is used, air is blown into the bottom box 1 and the middle box 2 through the blower 23. The air passes through the heat storage body 7, absorbs heat, takes away the heat in the heat storage body 7 and enters the water storage tank 12, heating the water in the water storage tank 12, thereby heating the material in the second exchange tube 10, thereby achieving full utilization of the heat.

[0041] In all the schemes mentioned above, the connection between the two components can be selected according to actual conditions by welding, bolt and nut connection, bolt or screw connection or other well-known connection methods, which will not be listed here one by one. In the above, all fixed connections are preferably welded. Although the embodiments of the present invention have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A flue gas waste heat recovery and utilization device, comprising a bottom box (1), characterized in that: An intermediate box (2) is provided at the upper end of the bottom box (1), an upper cover (3) is detachably provided on the intermediate box (2), an air intake pipe (4) is provided on the side end of the bottom box (1), an exhaust pipe (5) is fixedly provided on the upper cover (3), an igniter (6) is fixedly provided inside the bottom box (1), and a first heat exchange structure is provided inside the intermediate box (2); The first heat exchange structure comprises a heat storage body (7), a first exchange tube (8) and a first heat conducting plate (9); the heat storage body (7) is arranged inside the intermediate box (2); a second heat exchange structure is arranged at the upper end of the upper cover (3); the second heat exchange structure comprises a second exchange tube (10), a second heat conducting plate (11) and a water storage tank (12); and a plurality of water storage tanks (12) are provided.

2. The flue gas waste heat recovery and utilization device according to claim 1, characterized in that: A mounting frame (13) is fixedly provided inside the intermediate box (2), the heat storage body (7) is arranged on the mounting frame (13), a clamping block (14) is fixedly provided at the side end of the heat storage body (7), and a plurality of the first exchange tubes (8) and the first heat conducting fins (9) are provided.

3. The flue gas waste heat recovery and utilization device according to claim 2, characterized in that: The clamping block (14) and the mounting frame (13) cooperate with each other, the first heat conducting plate (9) is sleeved and mounted on the outside of the first exchange tube (8), and the first exchange tube (8) is fixedly arranged on the intermediate box (2).

4. The flue gas waste heat recovery and utilization device according to claim 1, characterized in that: The water storage tank (12) is fixedly arranged on the upper cover (3); a cover plate (15) is detachably provided on the upper end of the water storage tank (12); a plurality of second exchange tubes (10) and second heat conducting plates (11) are provided; an air inlet (16) is provided on the cover plate (15); and the air inlet (16) is connected to the exhaust pipe (5).

5. The flue gas waste heat recovery and utilization device according to claim 4, characterized in that: The second exchange tube (10) is arranged inside the water storage tank (12), the second heat conducting plate (11) is fixedly arranged on the outside of the second exchange tube (10), a water outlet (17) is provided at the side end of the water storage tank (12), and a side baffle (18) is detachably provided at the side end of the water storage tank (12).

6. The flue gas waste heat recovery and utilization device according to claim 5, characterized in that: A plurality of side baffles (18) are provided, and the side baffles (18) are connected to the water storage tank (12) by bolts. A water blocking block (19) is fixedly provided on the side baffle (18), and the water blocking block (19) cooperates with the water outlet (17).

7. The flue gas waste heat recovery and utilization device according to claim 4, characterized in that: An exhaust port (20) is provided at the upper end of the cover plate (15), and a plurality of exhaust ports (20) are provided. The cover plate (15) is connected to the water storage tank (12) by bolts. A sealing block (21) is fixedly provided on the cover plate (15), and a sealing groove (22) is provided on the side wall of the water storage tank (12) to cooperate with the sealing block (21).

8. The flue gas waste heat recovery and utilization device according to claim 1, characterized in that: The intermediate box (2) and the bottom box (1) are connected by bolts, a fan (23) is fixedly provided at the side end of the bottom box (1), a connecting pipe (24) is provided between the fan (23) and the bottom box (1), and the bottom box (1) and the fan (23) are communicated through the connecting pipe (24).

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