Boiler waste heat recovery device

Abstract

The utility model discloses a boiler waste heat recovery device, and particularly relates to the technical field of boiler heat recovery, which comprises a bottom plate, a filter box is arranged at the top of the bottom plate, a sealing plate is mounted on the outer wall of the filter box, a smoke inlet pipe connected with a boiler smoke outlet is arranged at one end of the sealing plate, and a recovery box is arranged at the top of the bottom plate and positioned on one side of the filter box. And a communicating pipe is arranged between the recycling box and the filtering box, heat exchange pipes are distributed in the recycling box in an S shape, a pump machine is arranged on one side of the recycling box, and a connecting pipe and a smoke exhaust pipe are arranged at the input end and the output end of the pump machine correspondingly. The high-temperature heat in the boiler can be recycled, waste of the heat is avoided, dust and toxic substances in high-temperature flue gas can be filtered and purified, the influence on the environment is reduced, and meanwhile, the effect of cleaning smoke dust on the inner wall of the filter box can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler heat recovery, and more specifically, to a boiler waste heat recovery device. Background Art

[0002] A boiler is an energy conversion device. The energy input into the boiler includes chemical energy and electrical energy in the fuel. The boiler outputs steam, high-temperature water or organic heat carrier with a certain amount of thermal energy. In order to improve the heat recovery effect of the boiler, the heat in the boiler needs to be recovered and utilized.

[0003] However, the current boiler waste heat recovery device is inconvenient to filter and purify the exhaust flue gas, and the direct discharge of flue gas is likely to pollute the environment and endanger the personal safety of the operator.

[0004] After searching, the Chinese patent with authorization announcement number CN219797253U discloses a boiler waste heat recovery device. This structure can achieve the purpose of recovering heat in the flue gas, and can filter and purify the dust in the flue gas, so that the exhausted gas will not pollute the surrounding environment, and the filter box can be disassembled, cleaned and replaced conveniently and quickly to ensure the filtering and purification effect.

[0005] However, in actual use, this structure installs the filter box inside the box to filter and adsorb the dust in the high-temperature flue gas. However, after the smoke and dust in the flue gas enters the interior of the box, it is easy to cause a large amount of smoke and dust to adhere to the inner wall of the box and be difficult to clean, affecting the use effect. In view of this, the present invention proposes a new boiler waste heat recovery device. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the utility model provides a boiler waste heat recovery device to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a boiler waste heat recovery device, comprising a base plate, a filter box is arranged on the top of the base plate, a sealing plate is installed on the outer wall of the filter box, a smoke inlet pipe connected to the boiler smoke exhaust port is arranged at one end of the sealing plate, one end of the smoke inlet pipe extends to the interior of the sealing plate, and the sealing plate is installed on the outer wall of the filter box by screws and is detachably connected to the filter box.

[0008] Specifically, in this structure, the high-temperature flue gas in the boiler can be transported to the interior of the filter box through the smoke inlet pipe, and the sealing plate can be detachably connected to the filter box by screws, which is convenient for removing the sealing plate and cleaning the smoke dust on the inner wall of the filter box.

[0009] In order to achieve heat exchange treatment of high-temperature flue gas and thus realize the effect of recycling and utilization, preferably, a recovery box is arranged on the top of the bottom plate and on one side of the filter box, a connecting pipe is arranged between the recovery box and the filter box, the interior of the recovery box is provided with heat exchange pipes distributed in an S shape, a pump is arranged on one side of the recovery box, the input and output ends of the pump are respectively provided with a connecting pipe and a smoke exhaust pipe, one end of the connecting pipe is connected with the filter box, and the other end extends to the interior of the recovery box and is connected to one end of the heat exchange pipe, the input and output ends of the pump are respectively connected to the connecting pipe and the smoke exhaust pipe, wherein one end of the connecting pipe extends to the interior of the recovery box and is connected to the other end of the heat exchange pipe.

[0010] In order to filter and adsorb dust and toxic substances in the flue gas, preferably, an installation frame is provided inside the filter box, and a filter net and an activated carbon adsorption net are respectively installed on the two outer walls of the installation frame by screws, and the filter net is on one side of the activated carbon adsorption net.

[0011] In order to be able to clean the smoke and dust on the inner wall of the filter box and facilitate the cleaning operation of the filter screen and the activated carbon adsorption screen, preferably, a movable scraping structure is provided at the connection between the mounting frame and the outer wall of the filter box, and the movable scraping structure includes a screw rod, and the two inner walls of the filter box are provided with mounting grooves, the screw rod is installed in one of the mounting grooves, and a sliding rod is provided in the other mounting groove, one end of the screw rod is provided with a motor, and the outside of the screw rod and the sliding rod are respectively provided with a threaded block and a guide block, and the outside of the mounting frame is provided with a rubber scraper strip, the motor is fixedly mounted on the outer wall of the filter box, and the output end of the motor is coaxially connected with the screw rod, the threaded block is mounted on the screw rod and threadedly connected to the screw rod, the guide block is mounted on the sliding rod and slidably connected to the guide block, and the threaded block and the guide block are respectively fixedly connected to the outer wall of the rubber scraper strip.

[0012] In order to facilitate adding cold water into the recycling box and discharging the heated water through the drainage pipe for people to use, preferably, the top of the recycling box is connected to a liquid inlet pipe, and the surface of the recycling box is connected to a drainage pipe.

[0013] Technical effects and advantages of the utility model:

[0014] By setting a movable scraping structure, the motor drives the screw rod to operate, so that the threaded block drives the rubber scraper to move, and the guide block slides and guides on the outside of the slide rod, and the rubber scraper sticks to the inner wall of the filter box to scrape the smoke and dust attached to the inner wall of the filter box and takes it out, thereby achieving the effect of cleaning the inner wall of the filter box, and the installation frame can be moved out from the inside of the filter box, so as to facilitate the cleaning of the filter screen and the activated carbon adsorption screen on the installation frame;

[0015] By installing a filter net and an activated carbon adsorption net inside the filter box, the dust and toxic substances in the high-temperature flue gas in the boiler can be filtered and adsorbed, thereby avoiding impact on the environment. In addition, the high-temperature flue gas flows in the S-shaped heat exchange tube, which can heat the cold water inside the recovery box, thereby achieving the heat recovery and utilization effect of the high-temperature flue gas and reducing heat waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] Figure 2 It is a schematic diagram of the connection structure of the connecting pipe, the connecting pipe and the heat exchange pipe of the utility model.

[0018] Figure 3 This is a schematic diagram of the connection structure between the sealing plate and the filter box of the utility model.

[0019] Figure 4 This is a schematic diagram of the internal structure of the filter box of the utility model.

[0020] Figure 5 It is a schematic diagram of the connection structure of the threaded block, the guide block and the rubber scraper strip of the utility model.

[0021] Figure 6 It is a schematic diagram of the connection structure of the filter screen, the activated carbon adsorption screen and the installation frame of the utility model.

[0022] The accompanying drawings are marked as follows: 1. bottom plate; 2. filter box; 3. sealing plate; 4. smoke inlet pipe; 5. recovery box; 6. connecting pipe; 7. heat exchange pipe; 8. pump; 9. connecting pipe; 10. smoke exhaust pipe; 11. installation frame; 12. filter net; 13. activated carbon adsorption net; 14. screw rod; 15. installation groove; 16. sliding rod; 17. motor; 18. threaded block; 19. guide block; 20. rubber scraper; 21. liquid inlet pipe; 22. liquid discharge pipe. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] As attached Figure 1-6The boiler waste heat recovery device shown includes a base plate 1, a filter box 2 is arranged on the top of the base plate 1, a sealing plate 3 is installed on the outer wall of the filter box 2, a smoke inlet pipe 4 connected to the boiler smoke exhaust port is arranged at one end of the sealing plate 3, one end of the smoke inlet pipe 4 extends to the interior of the sealing plate 3, and the sealing plate 3 is installed on the outer wall of the filter box 2 by screws and is detachably connected to the filter box 2.

[0025] Specifically, the smoke inlet pipe 4 is connected to the smoke exhaust port of the boiler, so that the high-temperature smoke of the boiler can be transported to the interior of the filter box 2 through the smoke inlet pipe 4. The sealing plate 3 can be detachably connected to the filter box 2 by screws, which is convenient for removing the sealing plate 3 and then facilitating the cleaning of the smoke dust on the inner wall of the filter box 2.

[0026] Combined with Figure 1 , 2 As shown, a recovery box 5 is provided on the top of the bottom plate 1 and on one side of the filter box 2, a connecting pipe 6 is provided between the recovery box 5 and the filter box 2, and a heat exchange tube 7 is provided in an S-shaped distribution inside the recovery box 5. A pump 8 is provided on one side of the recovery box 5, and a connecting pipe 9 and a smoke exhaust pipe 10 are provided at the input and output ends of the pump 8, respectively. One end of the connecting pipe 6 is connected to the filter box 2, and the other end extends to the interior of the recovery box 5 and is connected to one end of the heat exchange tube 7. The input and output ends of the pump 8 are connected to the connecting pipe 9 and the smoke exhaust pipe 10, respectively, wherein one end of the connecting pipe 9 extends to the interior of the recovery box 5 and is connected to the other end of the heat exchange tube 7.

[0027] Specifically, the pump 8 can transport the filtered flue gas inside the filter box 2 to the inside of the heat exchange tube 7 through the connecting pipe 6, and transport the high-temperature flue gas in an S shape through the heat exchange tube 7, and finally discharge the filtered flue gas through the connecting pipe 9 and the exhaust pipe 10. During the process of the heat exchange tube 7 transporting the high-temperature flue gas, water is stored in the recovery box 5, and then the heat exchange tube 7 can heat the water inside the recovery box 5 when transporting the high-temperature flue gas, thereby achieving the effect of preheating and recycling.

[0028] Combined with Figure 3 , 4 As shown in FIG. 6 , a mounting frame 11 is provided inside the filter box 2 , and a filter screen 12 and an activated carbon adsorption screen 13 are respectively mounted on two outer walls of the mounting frame 11 by screws, and the filter screen 12 is located on one side of the activated carbon adsorption screen 13 .

[0029] Specifically, after the high-temperature flue gas inside the boiler enters the filter box 2, it can be filtered through the filter net 12 and finally adsorbed through the activated carbon adsorption net 13, thereby preventing the exhaust flue gas from affecting the environment.

[0030] In this embodiment, as shown in the attached Figure 3 , 4As shown in Figure 5, a movable scraping structure is provided at the connection between the mounting frame 11 and the outer wall of the filter box 2, and the movable scraping structure includes a screw rod 14. Both inner walls of the filter box 2 are provided with mounting grooves 15. The screw rod 14 is installed in one of the mounting grooves 15, and a slide rod 16 is provided in the other mounting groove 15. A motor 17 is provided at one end of the screw rod 14. A threaded block 18 and a guide block 19 are respectively provided on the outside of the screw rod 14 and the slide rod 16. A rubber scraper 20 is sleeved on the outside of the mounting frame 11. The motor 17 is fixedly mounted on the outer wall of the filter box 2, and the output end of the motor 17 is coaxially connected with the screw rod 14. The threaded block 18 is mounted on the screw rod 14 and is threadedly connected to the screw rod 14. The guide block 19 is mounted on the slide rod 16 and is slidably connected to the guide block 19. The threaded block 18 and the guide block 19 are respectively fixedly connected to the outer wall of the rubber scraper 20.

[0031] Specifically, in this structure, the high-temperature flue gas in the boiler contains a large amount of smoke dust. When the high-temperature flue gas enters the inner wall of the filter box 2 through the smoke inlet pipe 4, a large amount of smoke dust is easily adsorbed on the inner wall of the filter box 2 and is difficult to clean. Then, the operator can remove the screws at the sealing plate 3 to remove the sealing plate 3 from the outer wall of the filter box 2. After that, the motor 17 drives the screw rod 14 inside the mounting groove 15 to operate, so that the threaded block 18 drives the rubber scraper 20 to move, and the guide block 19 slides and guides on the outside of the slide rod 16. The rubber scraper 20 is attached to the inner wall of the filter box 2 to scrape and remove the smoke dust attached to the inner wall of the filter box 2, thereby achieving the effect of cleaning the inner wall of the filter box 2.

[0032] According to the attached Figure 4 It can be seen that one end of the installation groove 15 opened on the two inner walls of the filter box 2 is through-opened, and then the screw rod 14 can guide the threaded block 18 and the guide block 19 from the outside of the screw rod 14 and the slide rod 16 to the outside of the filter box 2 during the rotation process, thereby driving the filter screen 12 and the activated carbon adsorption net 13 on the installation frame 11 to be guided out from the inside of the filter box 2, so that on the one hand, the scraped dust can be conveniently brought out of the outside of the filter box 2 by the rubber scraper 20, and on the other hand, the filter screen 12 and the activated carbon adsorption net 13 can be conveniently guided out from the inside of the filter box 2 for cleaning;

[0033] After the filter screen 12 and the activated carbon adsorption screen 13 are cleaned, the threaded block 18 and the guide block 19 are aligned with the corresponding positions of the screw rod 14 and the slide rod 16. The motor 17 drives the screw rod 14 to rotate, so that the filter screen 12 and the activated carbon adsorption screen 13 on the installation frame 11 can be re-extended to the interior of the filter box 2 for installation.

[0034] In this embodiment, as shown in the attached Figure 1 As shown, the top of the recovery box 5 is connected to a liquid inlet pipe 21 , and the surface of the recovery box 5 is connected to a liquid discharge pipe 22 .

[0035] Specifically, the liquid inlet pipe 21 is used to inject the cooling water into the interior of the recovery box for heat exchange, and the liquid discharge pipe 22 is used to discharge the cold water after the heating and heat exchange for use.

[0036] Working principle of this utility model:

[0037] When the above structure is used, the smoke inlet pipe 4 is first installed at the smoke outlet of the boiler. After the pump 8 is started, the high-temperature smoke inside the boiler enters the filter box 2 through the smoke inlet pipe 4, and the toxic substances in the smoke are filtered and purified through the filter screen 12 and the activated carbon adsorption screen 13 inside the filter box 2;

[0038] The treated flue gas enters the interior of the heat exchange tube 7 through the connecting pipe 6, and cold water is added to the interior of the recovery box 5 through the liquid inlet pipe 21. The heat exchange tube 7 can heat the cold water inside the recovery box 5 during the process of transporting the flue gas, so as to achieve the preheating recycling effect. The utilized flue gas is discharged through the exhaust pipe 10, and the water after heat exchange inside the recovery box 5 is discharged through the drain pipe 22 for people to use.

[0039] When there is a large amount of smoke and dust on the inner wall of the filter box 2, the operator removes the sealing plate 3 from the outer wall of the filter box 2, and drives the screw rod 14 to operate through the motor 17, so that the threaded block 18 drives the rubber scraper 20 to move, and slides and guides on the outside of the slide rod 16 through the guide block 19. The rubber scraper 20 is attached to the inner wall of the filter box 2 and scrapes it, so as to scrape off and take out the smoke and dust attached to the inner wall of the filter box 2, thereby achieving the effect of cleaning the inner wall of the filter box 2.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A boiler waste heat recovery device, comprising a bottom plate (1), characterized in that: A filter box (2) is arranged on the top of the bottom plate (1), a sealing plate (3) is installed on the outer wall of the filter box (2), a smoke inlet pipe (4) connected to the smoke exhaust port of the boiler is arranged at one end of the sealing plate (3), a recovery box (5) is arranged on the top of the bottom plate (1) and on one side of the filter box (2), a connecting pipe (6) is arranged between the recovery box (5) and the filter box (2), heat exchange pipes (7) are arranged in an S-shaped distribution inside the recovery box (5), a pump (8) is arranged on one side of the recovery box (5), a connecting pipe (9) and a smoke exhaust pipe (10) are respectively arranged at the input end and the output end of the pump (8), a mounting frame (11) is arranged inside the filter box (2), a filter screen (12) and an activated carbon adsorption screen (13) are respectively installed on two outer walls of the mounting frame (11) by screws, the filter screen (12) is located on one side of the activated carbon adsorption screen (13), and a movable scraping structure is arranged at the connection between the mounting frame (11) and the outer wall of the filter box (2); The movable scraping structure comprises a screw rod (14), and both inner walls of the filter box (2) are provided with mounting grooves (15). The screw rod (14) is installed inside one of the mounting grooves (15), and a sliding rod (16) is provided inside the other mounting groove (15). A motor (17) is provided at one end of the screw rod (14), and a threaded block (18) and a guide block (19) are provided outside the screw rod (14) and the sliding rod (16), respectively. A rubber scraping strip (20) is sleeved on the outside of the mounting frame (11).

2. The boiler waste heat recovery device according to claim 1, characterized in that: One end of the smoke inlet pipe (4) extends to the interior of the sealing plate (3); the sealing plate (3) is mounted on the outer wall of the filter box (2) by means of screws and is detachably connected to the filter box (2).

3. The boiler waste heat recovery device according to claim 1, characterized in that: One end of the connecting pipe (6) is connected to the filter box (2), and the other end extends to the interior of the recovery box (5) and is connected to one end of the heat exchange pipe (7).

4. The boiler waste heat recovery device according to claim 1, characterized in that: The input end and the output end of the pump (8) are respectively connected to the connecting pipe (9) and the smoke exhaust pipe (10), wherein one end of the connecting pipe (9) extends into the interior of the recovery box (5) and is connected to the other end of the heat exchange pipe (7).

5. The boiler waste heat recovery device according to claim 1, characterized in that: The top of the recovery box (5) is connected to a liquid inlet pipe (21), and the surface of the recovery box (5) is connected to a liquid discharge pipe (22).

6. The boiler waste heat recovery device according to claim 1, characterized in that: The motor (17) is fixedly mounted on the outer wall of the filter box (2), and the output end of the motor (17) is coaxially connected to the screw rod (14). The threaded block (18) is mounted on the screw rod (14) and is threadedly connected to the screw rod (14). The guide block (19) is mounted on the slide rod (16) and is slidably connected to the guide block (19). The threaded block (18) and the guide block (19) are respectively fixedly connected to the outer wall of the rubber scraper (20).

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