Boiler flue gas waste heat utilization device

Abstract

The utility model discloses a boiler flue gas waste heat utilization device which comprises a smoke exhaust channel and a drying mechanism arranged at one end of the smoke exhaust channel, the middle portion of the smoke exhaust channel is detachably connected with a dust removal assembly, the dust removal assembly comprises a dust removal box connected to the middle portion of the smoke exhaust channel, and a dust baffle set is arranged in the dust removal box; the drying mechanism comprises two supporting bases symmetrically arranged on the assembling bottom frame, two transmission gears are symmetrically arranged on each supporting base, the transmission gears are connected with a drying cylinder in a meshed mode, and a spiral ventilation cavity is formed in the outer wall of the drying cylinder. Smoke in the smoke exhaust channel is dedusted and filtered through the multiple dust baffles in the dust removal box, dust and impurities in the smoke are retained in the dust removal box under blocking of the multiple baffles, the situation that the dust in the smoke enters the spiral ventilation cavity to form accumulation, the ventilation effect is affected is effectively avoided, and the coal drying efficiency is improved.

Description

Technical Field

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

[0002] After coal is mined, since the freshly mined raw coal has many impurities and uneven quality, it is difficult to be directly utilized, so a drying process is required for impurity removal. An invention patent with the patent number "CN114543110A" and the patent name "A boiler flue gas waste heat utilization device" includes a support assembly, a swing assembly, a storage barrel, an air inlet assembly and a swing air delivery assembly. The storage barrel is rotatably arranged on one side of the support assembly, the swing assembly is installed on one side of the storage barrel and is used to drive the storage barrel to swing reciprocally. One end of the air inlet assembly extends into the storage barrel and is movably connected to the swing air delivery assembly. The air inlet assembly is used to convey boiler flue gas into the storage barrel through the swing air delivery assembly.

[0003] However, the above-mentioned boiler flue gas waste heat utilization device still has certain disadvantages in some usage situations: on the one hand, when the above-mentioned boiler flue gas waste heat utilization device directly heats and dries coal with boiler flue gas, it cannot remove dust impurities in the flue gas before that, resulting in poor coal quality. On the other hand, the above-mentioned boiler flue gas waste heat utilization device has a poor material turning effect, resulting in poor coal drying efficiency. Therefore, a boiler flue gas waste heat utilization device is proposed to specifically solve the above defects. Summary of the Invention

[0004] The utility model overcomes the deficiencies of the prior art and provides a boiler flue gas waste heat utilization device.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: a boiler flue gas waste heat utilization device, including: a smoke exhaust passage and a drying mechanism arranged at one end of the smoke exhaust passage. A dust removal component is detachably connected to the middle part of the smoke exhaust passage. The dust removal component includes: a dust removal box connected to the middle part of the smoke exhaust passage, and a dust blocking plate group is arranged in the dust removal box; the drying mechanism includes: two support bases symmetrically arranged on an assembly base frame, two transmission gears are symmetrically arranged on each support base, the transmission gears are meshed with a drying cylinder, a spiral air exchange cavity is arranged inside the outer wall of the drying cylinder, and the spiral air exchange cavity communicates with the smoke exhaust passage.

[0006] In a preferred embodiment of the present utility model, the dust baffle group includes: a first dust baffle, a second dust baffle, a third dust baffle, a fourth dust baffle, a fifth dust baffle, and a sixth dust baffle arranged in sequence. The first dust baffle is arranged in a conical shape, and the second dust baffle, the fourth dust baffle, and the sixth dust baffle are arranged in a conical cylinder shape, and the fourth dust baffle and the sixth dust baffle are symmetrically arranged.

[0007] In a preferred embodiment of the present utility model, a clamping groove is arranged at one end of the dust removal box, and an annular positioning plate is arranged at the other end of the dust removal box. The annular positioning plate is connected to the side surface of the dust removal box through a plurality of pulling springs.

[0008] In a preferred embodiment of the present utility model, a plurality of spiral turning plates are arranged in an array on the inner wall of the drying cylinder, and the surfaces of the plurality of spiral turning plates are arranged in an arc shape.

[0009] In a preferred embodiment of the present utility model, a plurality of annular racks are arranged on the outer peripheral side surface of the drying cylinder, and the plurality of annular racks are respectively meshed and connected to the transmission gears.

[0010] In a preferred embodiment of the present utility model, limit baffles are arranged on both side surfaces of the transmission gear, and the limit baffles cooperate with the annular racks.

[0011] In a preferred embodiment of the present utility model, a driving device is arranged on the upper surface of the assembly chassis, the output end of the driving device is connected to a transmission shaft through a transmission belt, and the transmission shaft is coaxially arranged with one of the transmission gears.

[0012] The present utility model solves the defects existing in the background technology, and the present utility model has the following beneficial effects:

[0013] (1) Through multiple dust baffle plates in the dust removal box of the present utility model, the flue gas in the smoke exhaust passage is dust-removed and filtered. The dust and impurities in the flue gas are retained in the dust removal box under the blockage of multiple baffle plates, effectively preventing the dust in the flue gas from entering and accumulating in the spiral air exchange cavity, affecting the ventilation effect, and improving the coal drying efficiency. Moreover, the fourth dust baffle and the sixth dust baffle are arranged in a conical cylinder shape, and the fourth dust baffle and the sixth dust baffle are symmetrically arranged, which can make each dust baffle play a guiding role for the flue gas, and make the flue gas fully contact with each dust baffle, effectively removing the dust in the flue gas, avoiding the accumulation of dust in the drying cylinder, and extending the service life of the equipment.

[0014] (2) While the driving device drives the drying cylinder to rotate, the boiler flue gas enters the spiral air exchange cavity in the drying cylinder, heats the inner wall of the drying cylinder, and dries the coal in the drying cylinder, effectively saving energy. On the other hand, through a number of spiral turning plates arranged in an array on the inner wall of the drying cylinder, while the drying cylinder rotates, the spiral turning plates can fully stir and turn the coal in the drying cylinder, further accelerating the coal drying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below in conjunction with the drawings and embodiments;

[0016] Figure 1 is a three-dimensional structure diagram of a preferred embodiment of the present invention;

[0017] Figure 2 is a cross-sectional schematic diagram of a preferred embodiment of the present invention;

[0018] Figure 3 is a three-dimensional structure diagram of the drying mechanism of the preferred embodiment of the present invention after hiding the drying cylinder;

[0019] Figure 4 is Figure 2 an enlarged schematic diagram of part A in

[0020] Specifically, 1. Smoke exhaust passage; 2. Dust removal box; 3. Assembly bottom frame; 4. Support base; 5. Transmission gear; 6. Drying cylinder; 7. Spiral air exchange cavity; 8. First dust baffle; 9. Second dust baffle; 10. Third dust baffle; 11. Fourth dust baffle; 12. Fifth dust baffle; 13. Sixth dust baffle; 14. Ring-shaped positioning plate; 15. Pulling spring; 16. Spiral turning plate; 17. Ring-shaped rack; 18. Limit baffle; 19. Driving device; 20. Transmission belt; 21. Sealing door; 22. Exhaust port; 23. Card slot. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Now, the present invention will be further described in detail in conjunction with the drawings and embodiments. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present invention in a schematic manner, and therefore only showing the components related to the present invention.

[0022] As Figure 1 and Figure 4As shown in the figure, a device for utilizing the waste heat of boiler flue gas includes: a smoke exhaust passage 1 and a drying mechanism arranged at one end of the smoke exhaust passage 1. A dust removal component is detachably connected to the middle part of the smoke exhaust passage 1. The dust removal component includes: a dust removal box 2 connected to the middle part of the smoke exhaust passage 1, and a dust blocking plate group is arranged in the dust removal box 2; the dust blocking plate group includes: a first dust blocking plate 8, a second dust blocking plate 9, a third dust blocking plate 10, a fourth dust blocking plate 11, a fifth dust blocking plate 12 and a sixth dust blocking plate 13 arranged in sequence. Through multiple dust blocking plates in the dust removal box 2, the flue gas in the smoke exhaust passage 1 is dust-removed and filtered. The dust and impurities in the flue gas are retained in the dust removal box 2 under the blockage of multiple baffle plates, effectively preventing the dust in the flue gas from accumulating in the spiral air exchange cavity 7 and affecting the ventilation effect, and improving the coal drying efficiency. Moreover, the fourth dust blocking plate 11 and the sixth dust blocking plate 13 are arranged in a conical cylinder shape, and the fourth dust blocking plate 11 and the sixth dust blocking plate 13 are symmetrically arranged, which can make each dust blocking plate play a guiding role in the flue gas, and enable the flue gas to fully contact each dust blocking plate, effectively removing the dust in the flue gas, preventing the dust from accumulating in the drying cylinder, and extending the service life of the equipment.

[0023] As Figure 2 and Figure 3 shown in the figure, the drying mechanism includes: two support bases 4 symmetrically arranged on the assembly base frame 3. Two transmission gears 5 are symmetrically arranged on each support base 4. The transmission gears 5 are meshed with the drying cylinder 6. A spiral air exchange cavity 7 is arranged inside the outer wall of the drying cylinder 6. The spiral air exchange cavity 7 communicates with the smoke exhaust passage 1. A sealing door 21 is arranged at one end of the drying cylinder 6, and an exhaust port 22 is arranged through the sealing door 21. A driving device 19 is arranged on the upper surface of the assembly base frame 3. The output end of the driving device 19 is connected to a transmission shaft through a transmission belt 20. The transmission shaft is coaxially arranged with one of the transmission gears 5. A plurality of annular racks 17 are arranged on the outer peripheral side surface of the drying cylinder 6. The plurality of annular racks 17 are respectively meshed with the transmission gears 5. Limiting baffle plates 18 are arranged on both side surfaces of the transmission gears 5. The limiting baffle plates 18 cooperate with the annular racks 17. While the driving device 19 drives the drying cylinder 6 to rotate, the boiler flue gas enters the spiral air exchange cavity 7 in the drying cylinder 6, heats the inner wall of the drying cylinder 6, and dries the coal in the drying cylinder 6, effectively saving energy.

[0024] In a preferred embodiment of the present invention, a plurality of spiral turning plates 16 are arranged in an array on the inner wall of the drying cylinder 6, and the surfaces of the plurality of spiral turning plates 16 are arc-shaped. Through the plurality of spiral turning plates 16 arranged in an array on the inner wall of the drying cylinder 6, while the drying cylinder 6 rotates, the spiral turning plates 16 can fully stir and turn the coal in the drying cylinder 6, further accelerating the coal drying efficiency.

[0025] In a preferred embodiment of the present utility model, the first dust baffle 8 is arranged in a conical shape, which can play a guiding role in the flowing flue gas and avoid directly hitting the side of the first dust baffle 8. At the same time, the second dust baffle 9, the fourth dust baffle 11 and the sixth dust baffle 13 are arranged in a conical cylinder shape, which can maximize the contact with the flue gas while guiding, so as to improve the dust removal and filtration effect.

[0026] In a preferred embodiment of the present utility model, a clamping groove 23 is arranged at one end of the dust removal box 2, and an annular positioning plate 14 is arranged at the other end of the dust removal box 2. The annular positioning plate 14 is connected to the side of the dust removal box 2 through a plurality of pulling springs 15. When installing the dust removal box 2, first make the annular positioning plate 14 contact with one end of the smoke exhaust channel 1, and make one end of the smoke exhaust channel 1 enter the dust removal box 2 until the other end of the smoke exhaust channel 1 can enter the clamping groove 23. Loosen the dust removal box 2, and the annular positioning plate 14 and the clamping groove 23 respectively abut against one end of the smoke exhaust channel 1, and the installation is completed. The disassembly of the dust removal box 2 is the same. By setting the dust removal box 2 to be detachable, the accumulated dust and impurities in the dust removal box 2 can be cleaned regularly and reused.

[0027] The working principle of the present utility model is as follows: After adding the coal after mining and cleaning to the drying cylinder 6, the output end of the driving device 19 drives the transmission gear 5 to rotate through the transmission belt 20. The transmission gear 5 meshes with the annular rack 17 to drive the drying cylinder 6 to rotate, turning and stirring the coal in the drying cylinder 6. At the same time, the flue gas sequentially passes through the first dust baffle 8, the second dust baffle 9, the third dust baffle 10, the fourth dust baffle 11, the fifth dust baffle 12 and the sixth dust baffle 13 in the dust removal box 2 and enters the spiral air exchange cavity 7 in the drying cylinder 6 to heat the inner wall of the drying cylinder 6 and dry the coal in the drying cylinder 6.

[0028] Based on the inspiration of the ideal embodiment of the present utility model, through the above description, relevant personnel can completely make various changes and modifications without departing from the technical idea of the present utility model. The technical scope of the present utility model is not limited to the content in the specification, and must be determined according to the scope of the claims.

Claims

1. A boiler flue gas waste heat utilization device, comprising: A smoke exhaust passage (1) and a drying mechanism arranged at one end of the smoke exhaust passage (1), characterized in that the middle part of the smoke exhaust passage (1) is detachably connected to a dust removal component, the dust removal component comprising: a dust removal box (2) connected to the middle part of the smoke exhaust passage (1), a dust shielding plate group being arranged in the dust removal box (2); the drying mechanism comprising: two support bases (4) symmetrically arranged on an assembly base (3), two transmission gears (5) being symmetrically arranged on each of the support bases (4), the transmission gears (5) being meshedly connected to a drying cylinder (6), a spiral ventilation chamber (7) being arranged in the outer wall of the drying cylinder (6), the spiral ventilation chamber (7) being connected to the smoke exhaust passage (1).

2. A boiler flue gas waste heat utilization device according to claim 1, characterized in that: The dust shield group comprises: a first dust shield (8), a second dust shield (9), a third dust shield (10), a fourth dust shield (11), a fifth dust shield (12) and a sixth dust shield (13) which are arranged in sequence, wherein the first dust shield (8) is arranged in a cone shape, the second dust shield (9), the fourth dust shield (11) and the sixth dust shield (13) are arranged in a cone shape, and the fourth dust shield (11) and the sixth dust shield (13) are arranged symmetrically.

3. The boiler flue gas waste heat utilization device according to claim 1, characterized in that: A slot (23) is provided at one end of the dust removal box (2), and an annular positioning plate (14) is provided at the other end of the dust removal box (2); the annular positioning plate (14) is connected to the side of the dust removal box (2) via a plurality of tension springs (15).

4. The boiler flue gas waste heat utilization device according to claim 1, characterized in that: A plurality of spiral turning plates (16) are arranged in an array on the inner wall of the drying cylinder (6), and the surfaces of the plurality of spiral turning plates (16) are arranged to be in an arc shape.

5. The boiler flue gas waste heat utilization device according to claim 1, characterized in that: A plurality of annular racks (17) are provided on the outer peripheral side of the drying cylinder (6), and the plurality of annular racks (17) are respectively meshed and connected to the transmission gear (5).

6. A boiler flue gas waste heat utilization device according to claim 5, characterized in that: Limit baffles (18) are provided on both side surfaces of the transmission gear (5), and the limit baffles (18) cooperate with the annular rack (17).

7. The boiler flue gas waste heat utilization device according to claim 1, characterized in that: A driving device (19) is arranged on the upper surface of the assembly chassis (3); an output end of the driving device (19) is connected to a transmission shaft via a transmission belt (20); and the transmission shaft is coaxially arranged with one of the transmission gears (5).

Images