Boiler flue gas waste heat recycling device

Abstract

The utility model discloses a boiler flue gas waste heat recycling device which comprises a boiler body, an ash filtering plate is installed at the bottom of the boiler body, a heating inner container is installed below the inner wall of the boiler body, a heating cavity is formed between the heating inner container and the boiler body, and a bottom flow guide pipe is jointly arranged on the inner sides of a plurality of flue gas conveying pipes. A plurality of top flow guide pipes are mounted on the upper portion of the inner wall of the heating inner container, and the bottom flow guide pipes are matched with the top flow guide pipes, so that temperature rise of liquid in the heating cavity is faster; high-temperature gas generated by the boiler is firstly conveyed into the filter box through the smoke outlet pipe and is filtered through the detachable filter plate, then the filtered gas is conveyed into the heating box to be heated and used, gas at the bottom can be conveyed into the ash outlet box by the fan through the return pipe, and due to the principle of cold air heat flow, the gas can be heated and used. And circulating gas enters the heating inner container again to be heated, and the process is repeated, so that the utilization efficiency of heat circulation is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of recycling devices, in particular to a boiler flue gas waste heat recycling device. Background Technique

[0002] At present, boiler combustion is commonly used in the industrial and chemical fields. With the development of industry, the state has issued a series of measures for energy conservation and emission reduction in boiler combustion. Promoting energy conservation and emission reduction is a practical need to ensure the sound and rapid development of the economy and build a resource-saving and environment-friendly society. At present, the commonly implemented measure is that the recovery and utilization of boiler flue gas waste heat is an important measure for energy conservation. Since the waste heat of the flue gas accounts for a large proportion of the boiler heat, the reasonable and effective utilization of this part of resources has a positive effect on improving the unit efficiency and reducing coal consumption.

[0003] There are still some problems in the actual use of the boiler flue gas waste heat recycling device in the current technology. For example: traditional boilers generally use combustion methods to generate a large amount of high-temperature gases. These gases lose heat quickly during the secondary utilization process through the recycling device, resulting in low utilization rate of the generated high-temperature gases. At the same time, if the directly produced flue gas is directly used, it will inevitably affect the use effect of subsequent equipment.

[0004] Therefore, a boiler flue gas waste heat recycling device is proposed. Content of the Utility Model

[0005] The purpose of the utility model is to provide a boiler flue gas waste heat recycling device to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A boiler flue gas waste heat recycling device, including a boiler main body, a dust filtering plate is installed at the bottom of the boiler main body, an ash discharging box is arranged below the dust filtering plate, the ash discharging box is installed on the boiler main body, a heating inner tank is installed below the inner wall of the boiler main body, a heating cavity is arranged between the heating inner tank and the boiler main body, a plurality of smoke conveying pipes are installed on one side of the heating inner tank, a bottom diversion pipe is jointly arranged inside the plurality of smoke conveying pipes, the bottom diversion pipe is installed on the heating inner tank, a plurality of top diversion pipes are installed above the inner wall of the heating inner tank, a smoke outlet pipe is installed at the top of the heating inner tank, the other end of the smoke outlet pipe is installed with a filtering box, a sealing port is opened on one side of the filtering box, a filtering plate is inserted inside the sealing port, a fixing component is arranged on one side of the filtering plate, a connecting pipe is installed on one side of the filtering box, the other end of the connecting pipe is installed with a heating box, and a circulating heating component is arranged on one side of the heating box.

[0007] Preferably, the fixing component includes a fixing block which is installed on the filter plate. A fixing screw is arranged inside the fixing block, the lower end of the fixing screw is installed on the filter box, and a fixing handle is arranged above the fixing block. The fixing handle is threadedly installed on the fixing screw.

[0008] Preferably, the circulating heating component includes a blower which is installed on the heating box. The output end of the blower is installed with a return pipe, and the other end of the return pipe penetrates through one side of the boiler body and extends into the ash discharge box.

[0009] Preferably, an opening is formed at the bottom of the filter box, and a dust collection box is installed inside the opening. A sealing cover is threadedly installed below the outer wall of the dust collection box.

[0010] Preferably, a hollow pipe is jointly installed inside the boiler body and the heating inner liner. A transmission shaft is rotatably installed inside the hollow pipe, and a fan blade is installed at one end of the transmission shaft.

[0011] Preferably, a driven wheel is installed at the other end of the transmission shaft, a driving wheel is meshed and installed on one side of the driven wheel, and a driving motor is installed on one side of the driving wheel. The driving motor is installed on the boiler body.

[0012] Preferably, a plurality of the sealing openings are all connected in communication with the inside of the heating cavity.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. In the present utility model, the high-temperature gas generated by the boiler is first transported to the inside of the filter box through the smoke outlet pipe, filtered by the detachable filter plate, and then the filtered gas is transported to the inside of the heating box for heating use. The gas at the bottom will be transported to the inside of the ash discharge box by the blower through the return pipe. Due to the principle of cold air and heat flow, the circulating gas re-enters the inside of the heating inner liner for heating up, and so on. This greatly improves the utilization efficiency of the heat cycle and also improves the energy conservation and emission reduction of the equipment.

[0015] 2. In the present utility model, the filter plate filters the lumps in the gas, so that the lumps fall into the inside of the dust collection box for centralized collection. In the later stage, the dust collection box can be opened by rotating the sealing cover to centrally process the dust;

[0016] At the same time, by controlling the rotation of the driving motor, the driving wheel and the driven wheel are driven to rotate, so as to drive the transmission shaft to rotate inside the hollow pipe, and then drive the fan blade to rotate left and right above the inside of the heating inner liner, so that the high-temperature gas stays in the inside of the heating inner liner for a longer time, thereby further improving the utilization rate of energy. Description of the Drawings

[0017] Figure 1 It is the main structural schematic diagram of the present utility model;

[0018] Figure 2 It is the sectional structural schematic diagram of the present utility model;

[0019] Figure 3 is Figure 2 the enlarged view of part A in

[0020] Figure 4 It is the partial sectional structural schematic diagram of the present utility model;

[0021] Figure 5 is Figure 4 the enlarged view of part B in

[0022] In the figure: 1. Boiler main body; 2. Ash filtering plate; 3. Ash discharging box; 4. Heating inner tank; 5. Heating cavity; 6. Bottom diversion pipe; 61. Top diversion pipe; 7. Smoke conveying pipe; 8. Smoke discharging pipe; 9. Filtering box; 10. Sealing port; 11. Filtering plate; 12. Fixed block; 13. Fixed screw; 14. Fixed handle; 15. Connecting pipe; 16. Heating box; 17. Fan; 18. Return pipe; 19. Opening; 20. Dust collecting box; 21. Sealing cover; 22. Hollow pipe; 23. Transmission shaft; 24. Fan blade; 25. Driven wheel; 26. Driving wheel; 27. Driving motor. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] Embodiment 1: Please refer to Figures 1-5 , the present utility model provides a technical solution: A boiler flue gas waste heat recovery and utilization device, including a boiler main body 1, an ash filtering plate 2 is installed at the bottom of the boiler main body 1, an ash discharging box 3 is arranged below the ash filtering plate 2, the ash discharging box 3 is installed on the boiler main body 1, a heating inner tank 4 is installed below the inner wall of the boiler main body 1, a heating cavity 5 is arranged between the heating inner tank 4 and the boiler main body 1, a plurality of smoke conveying pipes 7 are installed on one side of the heating inner tank 4, a bottom diversion pipe 6 is jointly arranged inside the plurality of smoke conveying pipes 7, the bottom diversion pipe 6 is installed on the heating inner tank 4, a plurality of top diversion pipes 61 are installed above the inner wall of the heating inner tank 4, and the cooperation of the bottom diversion pipe 6 and the top diversion pipe 61 enables the liquid inside the heating cavity 5 to heat up faster;

[0025] At the top of the heating inner tank 4, a smoke outlet pipe 8 is installed. At the other end of the smoke outlet pipe 8, a filter box 9 is installed. On one side of the filter box 9, a sealing port 10 is provided. Inside the sealing port 10, a filter plate 11 is inserted. On one side of the filter plate 11, a fixing component is arranged. On one side of the filter box 9, a connecting pipe 15 is installed. At the other end of the connecting pipe 15, a heating box 16 is installed. On one side of the heating box 16, a circulating heating component is arranged. It is transported to the inside of the filter box 9 through the smoke outlet pipe 8, filtered by the detachable filter plate 11, and then the filtered gas is transported to the inside of the heating box 16 for heating use. The gas at the bottom will be transported to the inside of the ash removal box 3 by the blower 17 through the return pipe 18. Due to the principle of cold air and heat flow, the circulating gas re-enters the heating inner tank 4 for temperature rise and heating, and so on, greatly improving the utilization efficiency of the thermal cycle.

[0026] As Figure 2 and 3 shown, the fixing component includes a fixing block 12. The fixing block 12 is installed on the filter plate 11. Inside the fixing block 12, a fixing screw 13 is arranged. The lower end of the fixing screw 13 is installed on the filter box 9. Above the fixing block 12, a fixing handle 14 is provided. The fixing handle 14 is threadedly installed on the fixing screw 13. An opening 19 is provided at the bottom of the filter box 9. Inside the opening 19, a dust collection box 20 is installed. A sealing cover 21 is threadedly installed below the outer wall of the dust collection box 20. By rotating the fixing handle 14, the fixing block 12 is pushed to move up and down along the shaft wall of the fixing screw 13, thereby realizing the installation and disassembly of the filter plate 11, which is convenient for later cleaning or replacement.

[0027] The circulating heating component includes a blower 17. The blower 17 is installed on the heating box 16. The output end of the blower 17 is installed with a return pipe 18. The other end of the return pipe 18 penetrates through one side of the boiler body 1 and extends to the inside of the ash removal box 3. The gas with a lower temperature is transported to the inside of the return pipe 18 through the blower 17 and finally transported to the inside of the ash removal box 3, so that the circulating gas re-enters the heating inner tank 4 for temperature rise and heating from bottom to top again, and so on, greatly improving the utilization efficiency of the thermal cycle.

[0028] The working principle is as follows: When the utility model is actually used, the combustion energy is first placed in the combustion chamber on the boiler main body 1 and burned on the ash filtering plate 2. The sparks or lumps generated by combustion fall onto the ash filtering plate 2 and continue to generate high temperature. At the same time, the outside of the top diversion pipe 61 is heated. By improving the heat rising efficiency of the clamping block and transmitting the heat of the clamping block through multiple smoke pipes 7 arranged inside, the liquid in the boiler is heated. Then, the high-temperature gas is transported to the inside of the filtering box 9 through the smoke pipe 8 above, and filtered by the filter plate 11. Here, the installation and disassembly of the filter plate 11 can be realized by rotating the fixing handle 14 to push the fixing block 12 to move up and down along the shaft wall of the fixing screw 13, which is convenient for later cleaning or replacement. The filtered gas is transported to the inside of the heating box 16 through the connecting pipe 15 for heating use. The gas with lower temperature is transported to the inside of the return pipe 18 through the fan 17 and finally transported to the inside of the ash discharging box 3, so that the circulating gas re-enters the inside of the heating inner tank 4 and is heated again from bottom to top. This process is repeated, greatly improving the utilization efficiency of the thermal cycle and also improving the energy conservation and emission reduction of the equipment.

[0029] Embodiment 2: As Figure 4 and 5 shown, to further improve the utilization rate of the combustion energy of the equipment, a hollow pipe 22 is installed inside the boiler main body 1 and the heating inner tank 4. A transmission shaft 23 is rotatably installed inside the hollow pipe 22. A fan blade 24 is installed at one end of the transmission shaft 23. A driven wheel 25 is installed at the other end of the transmission shaft 23. A driving wheel 26 is meshed and installed on one side of the driven wheel 25. A driving motor 27 is installed on one side of the driving wheel 26. The driving motor 27 is installed on the boiler main body 1. By controlling the driving motor 27 to rotate, the driving wheel 26 and the driven wheel 25 are driven to rotate, thereby driving the transmission shaft 23 to rotate inside the hollow pipe 22, and driving the fan blade 24 to rotate left and right above the inside of the heating inner tank 4, so that the high-temperature gas stays in the heating inner tank 4 for a longer time, thereby further improving the utilization rate of the energy.

[0030] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A boiler flue gas waste heat recovery and utilization device, comprising a boiler body (1), characterized in that: An ash filter plate (2) is installed at the bottom of the boiler body (1), an ash box (3) is arranged below the ash filter plate (2), and the ash box (3) is installed on the boiler body (1). A heating liner (4) is installed below the inner wall of the boiler body (1), and a heating cavity (5) is arranged between the heating liner (4) and the boiler body (1). A plurality of smoke conveying pipes (7) are installed on one side of the heating liner (4), and a bottom guide pipe (6) is commonly arranged on the inner side of the plurality of smoke conveying pipes (7). The bottom guide pipe (6) is installed on the heating liner (4), and the heating liner ( 4) A plurality of top guide pipes (61) are installed above the inner wall, a smoke outlet pipe (8) is installed on the top of the heating inner tank (4), a filter box (9) is installed at the other end of the smoke outlet pipe (8), a sealing opening (10) is opened on one side of the filter box (9), a filter plate (11) is inserted into the inside of the sealing opening (10), a fixing component is provided on one side of the filter plate (11), a connecting pipe (15) is installed on one side of the filter box (9), a heating box (16) is installed at the other end of the connecting pipe (15), and a circulating heating component is provided on one side of the heating box (16).

2. The boiler flue gas waste heat recovery device according to claim 1, characterized in that: The fixing assembly comprises a fixing block (12), the fixing block (12) being mounted on the filter plate (11), a fixing screw (13) being arranged inside the fixing block (12), the lower end of the fixing screw (13) being mounted on the filter box (9), and a fixing handle (14) being arranged above the fixing block (12), the fixing handle (14) being threadedly mounted on the fixing screw (13).

3. The boiler flue gas waste heat recovery device according to claim 1 is characterized in that: The circulating heating component comprises a fan (17), the fan (17) being mounted on a heating box (16), a return pipe (18) being mounted on an output end of the fan (17), the other end of the return pipe (18) penetrating one side of a boiler body (1) and extending to the interior of an ash box (3).

4. A boiler flue gas waste heat recovery device according to any one of claims 1 to 3, characterized in that: The bottom of the filter box (9) is provided with an opening (19), a dust collecting box (20) is installed inside the opening (19), and a sealing cover (21) is threadedly installed below the outer wall of the dust collecting box (20).

5. The boiler flue gas waste heat recovery device according to claim 1, characterized in that: A hollow tube (22) is installed inside the boiler body (1) and the heating inner tank (4), a transmission shaft (23) is rotatably installed inside the hollow tube (22), and a fan blade (24) is installed at one end of the transmission shaft (23).

6. The boiler flue gas waste heat recovery device according to claim 5, characterized in that: A driven wheel (25) is mounted on the other end of the transmission shaft (23); a driving wheel (26) is meshedly mounted on one side of the driven wheel (25); a driving motor (27) is mounted on one side of the driving wheel (26); and the driving motor (27) is mounted on the boiler body (1).

7. The boiler flue gas waste heat recovery device according to claim 1, characterized in that: The plurality of sealing openings (10) are all connected to the interior of the heating cavity (5).

Images