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 flue gas waste heat recovery and comprises a heat preservation tank, an upper water storage tank, a lower water storage tank and a water pipe. The upper water storage tank is rotatably mounted at the top of the heat preservation tank, the lower water storage tank is rotatably mounted at the bottom of the heat preservation tank, the upper water storage tank is communicated with the lower water storage tank through the water pipes, a plurality of slag inlets are formed in the top wall of the lower water storage tank, and the slag inlets are communicated with the lower water storage tank through the water pipes. A slag storage chamber is fixedly arranged in the lower water storage tank, the bottoms of the multiple water pipes all penetrate through the slag storage chamber to be communicated with the interior of the lower water storage tank, and the multiple water pipes are all sleeved with scraping sleeves used for cleaning the outer walls of the water pipes. Impurities in the flue gas can fall on the wall of the heat exchange tube after long-time use, and the interior of the heat exchange tube is convenient to clean, so that the heat exchange efficiency of the flue gas is influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas recovery, in particular to a flue gas waste heat recovery device. Background Art

[0002] In the industrial production of metallurgy, chemical industry, machinery manufacturing, etc., a large amount of high-temperature flue gas will be discharged. If the high-temperature flue gas is directly discharged into the air, it will not only cause a large amount of heat waste, but also cause great pollution to the environment. In view of the waste heat carried in the flue gas, there are many devices for recovering waste heat from flue gas in the prior art. The main form of recovery is to wrap the heating pipe filled with heating medium around the flue gas pipeline, and transfer the heat in the flue gas to the heating medium in the heating pipe, so that the heating medium is heated to complete the heat exchange.

[0003] However, the existing waste heat recovery device lacks components for filtering the flue gas, and the flue gas is directly discharged into the heat exchange chamber for heat exchange. After long-term use, impurities in the flue gas will fall onto the wall of the heat exchange tube, and the existing waste heat recovery device is not easy to clean inside, which affects the flue gas heat exchange efficiency. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a flue gas waste heat recovery device, which solves the technical problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a flue gas waste heat recovery device, comprising an insulation tank, an upper water storage tank, a lower water storage tank and a water pipe; the upper water storage tank is rotatably installed on the top of the insulation tank, the lower water storage tank is rotatably installed on the bottom of the insulation tank, the number of the water pipes is several, the upper water storage tank and the lower water storage tank are connected through the several water pipes, the top wall of the lower water storage tank is provided with several slag inlets, a slag storage chamber is fixedly provided in the lower water storage tank, the bottoms of several water pipes all pass through the slag storage chamber and are connected with the interior of the lower water storage tank, a drain pipe is fixedly connected to the lower water storage tank, a slag discharge pipe is fixedly connected to the slag storage chamber, several water pipes are all provided with a scraper sleeve for cleaning the outer wall of the water pipe, a driving component for driving the scraper sleeve to rise and fall is installed on the insulation tank; a filtering component for filtering flue gas is provided on the insulation tank.

[0006] Preferably, the filter assembly includes a filter plate, a de-impurity box is fixedly mounted on the heat preservation tank, the filter plate is installed in the de-impurity box, and the de-impurity box is connected to the interior of the heat preservation tank through a smoke inlet.

[0007] Preferably, a smoke inlet pipe and a debris exhaust pipe are fixedly connected to the debris removal box.

[0008] Preferably, the lifting assembly includes a lifting rod, a mounting plate is fixedly installed on the rear side of the insulation tank, a second motor is fixedly installed on the mounting plate, a driving end of the second motor passes through the mounting plate and is fixedly installed with a threaded rod, the lifting rod is screwed onto the threaded rod, a pair of guide rods are fixedly installed on the mounting plate on both sides of the second motor, the lifting rod is slidably installed on the pair of guide rods, a plurality of scraper sleeves are fixedly connected to the lifting rod, and a plurality of sliding openings for slidingly installing the scraper sleeves are opened on the rear side wall of the insulation tank.

[0009] Preferably, a water inlet pipe is fixedly connected to the top of the upper water storage tank, the water inlet pipe is rotatably installed in the insulation tank, and the water inlet pipe is connected to an external water supply pipe through a rotating joint.

[0010] Preferably, a driven gear ring is fixedly mounted on the water inlet pipe, a first motor is fixedly mounted on the top of the heat preservation tank, and a driving gear meshing with the driven gear ring is fixedly mounted on the driving end of the first motor.

[0011] Preferably, an air cloth hood is fixedly mounted on the rear side wall of the heat preservation tank.

[0012] Beneficial Effects

[0013] The utility model provides a flue gas waste heat recovery device, which has the following beneficial effects:

[0014] 1. By providing a scraper sleeve, impurities on the outer wall of the water pipe can be scraped off. By providing a slag inlet, the scraped impurities can enter the slag storage chamber through the slag inlet. By installing a slag discharge pipe, the residue in the slag storage chamber can be discharged from the slag discharge pipe. By installing a drain pipe, the water in the lower water storage tank can be discharged through the drain pipe, so as to facilitate the cleaning of the water pipe, thereby effectively preventing impurities in the flue gas from falling on the water pipe wall after long-term use, making it inconvenient to clean the water pipe wall and affecting the flue gas heat exchange efficiency;

[0015] 2. By installing a heat preservation tank, when high-temperature flue gas is introduced, heat dissipation can be effectively avoided to cause heat waste. By installing an upper water storage tank, the water in the upper water storage tank can be evenly introduced into the water pipe. By installing a lower water storage tank, the water in the water pipe can be gathered in the lower water storage tank and discharged together. By setting the upper water storage tank and the lower water storage tank to be rotatable, the upper water storage tank and the lower water storage tank can drive the water pipe to rotate together, so that each water pipe can be evenly heated, and the flow speed of the flue gas waste heat can be accelerated, so as to achieve the effect of quickly recovering the flue gas waste heat, and effectively improve the flue gas recovery speed;

[0016] 3. By installing a de-impurity box, the flue gas can be de-impured first, and by installing a filter plate, the flue gas can be filtered. The filtered impurities are retained on the smoke inlet side of the filter plate. The filtered flue gas enters the insulation tank through the smoke inlet for waste heat recovery treatment, which can further prevent impurities in the flue gas from being retained on the water pipe wall and affecting the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the internal structure of the utility model;

[0018] Figure 2 It is a rear view of the utility model;

[0019] Figure 3 It is a schematic diagram of the internal structure of the air cloth hood of the utility model.

[0020] In the figure: 1. insulation tank; 2. upper water storage tank; 3. lower water storage tank; 4. water pipe; 5. water inlet pipe; 6. first motor; 7. driving gear; 8. driven gear ring; 9. scraper sleeve; 10. slag storage chamber; 11. slag inlet; 12. slag discharge pipe; 13. second motor; 14. debris removal box; 15. filter plate; 16. lifting rod; 17. threaded rod; 18. drain pipe; 19. smoke exhaust port; 20. cloth air hood. DETAILED DESCRIPTION

[0021] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention, wherein the directional nouns such as "upper", "lower", etc. mentioned in this document are as follows: Figure 1 The orientation is used as a reference.

[0022] See also Figure 1-2 The utility model provides a technical solution: a flue gas waste heat recovery device, comprising an insulation tank 1, an upper water storage tank 2, a lower water storage tank 3 and a water pipe 4; the upper water storage tank 2 is rotatably installed on the top of the insulation tank 1, and the lower water storage tank 3 is rotatably installed on the bottom of the insulation tank 1. There are several water pipes 4, and the upper water storage tank 2 and the lower water storage tank 3 are connected through several water pipes 4. Several slag inlets 11 are opened on the top wall of the lower water storage tank 3, and a slag storage chamber 10 is fixedly arranged in the lower water storage tank 3. The bottoms of several water pipes 4 all penetrate the slag storage chamber 10 and are connected with the inside of the lower water storage tank 3. A drainage pipe 18 is fixedly connected to the lower water storage tank 3, and a slag discharge pipe 12 is fixedly connected to the slag storage chamber 10. Scraping sleeves 9 for cleaning the outer walls of the water pipes 4 are sleeved on the several water pipes 4, and a driving component for driving the scraping sleeve 9 to rise and fall is installed on the insulation tank 1; a filtering component for filtering flue gas is provided on the insulation tank 1.

[0023] In this embodiment, by installing the heat preservation tank 1, when the high-temperature flue gas is introduced, the heat dissipation and heat waste caused by the introduction can be effectively avoided. By installing the upper water storage tank 2, the water in the upper water storage tank 2 can be evenly introduced into the water pipe 4. By installing the lower water storage tank 3, the water in the water pipe 4 can be gathered in the lower water storage tank 3 and discharged together. By setting the upper water storage tank 2 and the lower water storage tank 3 to be rotatable, the upper water storage tank 2 and the lower water storage tank 3 can drive the water pipe 4 to rotate together, so that each water pipe 4 can be evenly heated, and the flow speed of the flue gas waste heat can be accelerated, so as to achieve rapid recovery of the flue gas waste heat. The thermal effect can effectively improve the flue gas recovery speed. By providing a scraper sleeve 9, impurities on the outer wall of the water pipe 4 can be scraped off. By opening a slag inlet 11, the scraped impurities can enter the slag storage chamber 10 through the slag inlet 11. By installing a slag discharge pipe 12, the residue in the slag storage chamber 10 can be discharged from the slag discharge pipe 12. By installing a drain pipe 18, the water in the lower water storage tank 3 can be discharged through the drain pipe 18, so as to facilitate the cleaning of the water pipe 4, thereby effectively avoiding that impurities in the flue gas will fall on the wall of the water pipe 4 after long-term use, making it inconvenient to clean the wall of the water pipe 4 and affecting the flue gas heat exchange efficiency.

[0024] As an embodiment of the utility model, the filter assembly includes a filter plate 15, a debris removal box 14 is fixedly installed on the insulation tank 1, the filter plate 15 is installed in the debris removal box 14, and the debris removal box 14 is connected to the inside of the insulation tank 1 through the smoke inlet.

[0025] In this embodiment, the flue gas can be firstly cleaned by installing a cleaning box 14, and the flue gas can be filtered by installing a filter plate 15. The filtered impurities are retained on the smoke inlet side of the filter plate 15, and the filtered flue gas enters the insulation tank 1 through the smoke inlet for waste heat recovery treatment, which can further prevent impurities in the flue gas from being retained on the wall of the water pipe 4 and affecting the heat exchange efficiency.

[0026] As an embodiment of the utility model, the impurity removal box 14 is fixedly connected with a smoke inlet pipe and a slag discharge pipe 12 .

[0027] In this embodiment, the smoke is introduced into the impurity removal box 14 through the smoke inlet pipe, and the impurities filtered by the filter plate 15 can be discharged through the slag discharge pipe 12.

[0028] As an embodiment of the utility model, the lifting assembly includes a lifting rod 16, a mounting plate is fixedly installed on the rear side of the insulation tank 1, a second motor 13 is fixedly installed on the mounting plate, the driving end of the second motor 13 passes through the mounting plate and is fixedly installed with a threaded rod 17, the lifting rod 16 is screwed on the threaded rod 17, a pair of guide rods are fixedly installed on the mounting plates on both sides of the second motor 13, the lifting rod 16 is slidably installed on the pair of guide rods, a number of scraper sleeves 9 are fixedly connected to the lifting rod 16, and a number of sliding openings for slidingly installing the scraper sleeves 9 are opened on the rear side wall of the insulation tank 1.

[0029] In this embodiment, a mounting plate is installed to install the second motor 13. By installing the second motor 13, starting the second motor 13 can drive the threaded rod 17 to rotate. The rotation of the threaded rod 17 can drive the lifting rod 16 to move up and down, thereby driving the scraper sleeve 9 to move up and down. By installing a guide rod, the lifting plate can be guided.

[0030] As an embodiment of the utility model, a water inlet pipe 5 is fixedly connected to the top of the upper water storage tank 2, the water inlet pipe 5 is rotatably installed in the insulation tank 1, and the water inlet pipe 5 is connected to an external water supply pipe through a rotating joint.

[0031] In this embodiment, by connecting a water inlet pipe 5, water can be passed into the upper water storage tank 2 through the water inlet pipe 5. The rotation of the water inlet pipe 5 can drive the upper water storage tank 2 and the lower water storage tank 3 to rotate together. By providing a rotating joint, the water inlet pipe 5 can pass water while rotating.

[0032] As an embodiment of the utility model, a driven gear ring 8 is fixedly installed on the water inlet pipe 5, a first motor 6 is fixedly installed on the top of the insulation tank 1, and a driving gear 7 meshing with the driven gear ring 8 is fixedly installed on the driving end of the first motor 6.

[0033] In this embodiment, by installing the first motor 6, starting the first motor 6 can drive the driving gear 7 to rotate, and the driving gear 7 can be meshed with the driven gear ring 8 to drive the driven gear ring 8 to rotate, thereby driving the water inlet pipe 5 to rotate.

[0034] As an embodiment of the present utility model, an air distribution hood 20 is fixedly mounted on the rear side wall of the heat preservation tank 1 .

[0035] In this embodiment, the smoke in the heat preservation tank 1 can be prevented from being released by installing the gas hood 20 .

[0036] Through the personnel in this field, all the electrical components in this case are connected to their corresponding power supplies through wires, and a suitable controller should be selected according to the actual situation to meet the control requirements. The specific connection and control sequence should refer to the following working principle, and the electrical connection between the electrical components is completed in the order of working in sequence. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process, and does not explain the electrical control.

[0037] The working principle and use process of the utility model are as follows: when in use, the smoke is passed into the impurity removal box 14 through the smoke inlet pipe, and the smoke is filtered through the filter plate 15. The filtered smoke enters the heat preservation tank 1 from the smoke inlet for waste heat recovery treatment, and the impurities generated by the filtration are discharged through the impurity discharge pipe. The valve on the externally connected water supply pipe is opened to allow water to pass through the water inlet pipe 5 into the upper water storage tank 2 and then into the water pipe 4. The first motor 6 is started to drive the driving gear 7 to rotate, and the driving gear 7 is meshed with the driven gear ring 8 to drive the driven gear ring 8 to rotate, thereby driving The rotation of the water inlet pipe 5 can effectively speed up the heat exchange efficiency. The smoke after heat exchange can be discharged through the smoke exhaust port 19, and the water after heat exchange can be discharged through the drain pipe 18. After long-term use, in order to further avoid impurities remaining on the wall of the water pipe 4 and affecting the heat exchange efficiency, the wall of the water pipe 4 can be cleaned, and the second motor 13 is started to drive the threaded rod 17 to rotate, thereby driving the lifting rod 16 to lift and lower a plurality of scraper sleeves 9, so that the impurities on the wall of the water pipe 4 can be scraped off, and the scraped impurities enter the slag storage chamber 10 through the slag inlet 11, and then can be discharged through the slag discharge pipe 12.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flue gas waste heat recovery device, characterized in that: The invention comprises a heat preservation tank (1), an upper water storage tank (2), a lower water storage tank (3) and a water pipe (4); the upper water storage tank (2) is rotatably mounted on the top of the heat preservation tank (1), the lower water storage tank (3) is rotatably mounted on the bottom of the heat preservation tank (1), the water pipe (4) is provided in a plurality, the upper water storage tank (2) and the lower water storage tank (3) are connected via the plurality of water pipes (4), the top wall of the lower water storage tank (3) is provided with a plurality of slag inlets (11), and a slag storage chamber (11) is fixedly provided in the lower water storage tank (3) 10), the bottoms of several water pipes (4) all penetrate the slag storage chamber (10) and are connected to the interior of the lower water storage tank (3), a drainage pipe (18) is fixedly connected to the lower water storage tank (3), and a slag discharge pipe (12) is fixedly connected to the slag storage chamber (10), several water pipes (4) are all provided with a scraper sleeve (9) for cleaning the outer wall of the water pipe (4), and a driving component for driving the scraper sleeve (9) to rise and fall is installed on the heat preservation tank (1); and a filtering component for filtering smoke is provided on the heat preservation tank (1).

2. The flue gas waste heat recovery device according to claim 1, characterized in that: The filter assembly comprises a filter plate (15); a de-impurity box (14) is fixedly mounted on the heat preservation tank (1); the filter plate (15) is mounted in the de-impurity box (14); and the de-impurity box (14) is connected to the interior of the heat preservation tank (1) through a smoke inlet.

3. A flue gas waste heat recovery device according to claim 2, characterized in that: The impurity removal box (14) is fixedly connected with a smoke inlet pipe and an impurity exhaust pipe.

4. The flue gas waste heat recovery device according to claim 1, characterized in that: The driving assembly comprises a lifting rod (16), a mounting plate is fixedly mounted on the rear side of the heat preservation tank (1), a second motor (13) is fixedly mounted on the mounting plate, a driving end of the second motor (13) passes through the mounting plate and is fixedly mounted with a threaded rod (17), the lifting rod (16) is screwed onto the threaded rod (17), a pair of guide rods are fixedly mounted on the mounting plate on both sides of the second motor (13), the lifting rod (16) is slidably mounted on the pair of guide rods, a plurality of scraper sleeves (9) are fixedly connected to the lifting rod (16), and a plurality of sliding openings for slidably mounting the scraper sleeves (9) are provided on the rear side wall of the heat preservation tank (1).

5. The flue gas waste heat recovery device according to claim 1, characterized in that: A water inlet pipe (5) is fixedly connected to the top of the upper water storage tank (2); the water inlet pipe (5) is rotatably installed in the heat preservation tank (1); and the water inlet pipe (5) is connected to an external water supply pipe via a rotating joint.

6. A flue gas waste heat recovery device according to claim 5, characterized in that: A driven gear ring (8) is fixedly mounted on the water inlet pipe (5), a first motor (6) is fixedly mounted on the top of the heat preservation tank (1), and a driving gear (7) meshing with the driven gear ring (8) is fixedly mounted on the driving end of the first motor (6).

7. The flue gas waste heat recovery device according to claim 1, characterized in that: An air distribution hood (20) is fixedly mounted on the rear side wall of the heat preservation tank (1).

Images