A kiln waste heat recycling device

Abstract

The application discloses a kiln waste heat recycling device, which comprises a filter box and a heat exchange box fixedly connected to one side of the filter box, a dust removal assembly is arranged on the inner side of the filter box and comprises a filter screen fixedly arranged, a support frame is vertically movably arranged on the inner side of the filter screen, and a brush roller is rotatably connected to the inner side of the support frame; a circulating heat exchange mechanism is arranged on the inner side of the heat exchange box and comprises a plurality of circulating assemblies and an adjusting assembly; the circulating assembly comprises a circulating inlet pipe and a plurality of circulating pipes arranged in a circumferential equi-radian array, the circulating inlet pipe and the plurality of circulating pipes revolve around an axis, and the circulating inlet pipe and the plurality of circulating pipes can rotate around their own axes; a plurality of spiral stirring rods are rotatably arranged on the inner sides of the circulating inlet pipe and the plurality of circulating pipes; and the adjusting assembly comprises heat-conducting fins, the dynamic adjustment of the heat exchange surface and the self-adaptation under variable working conditions are realized through the revolution and rotation superposition of the circulating inlet pipe and the plurality of circulating pipes and the angle adjustment of the heat-conducting fins.

Description

Technical Field

[0001] This invention relates to the field of waste heat recovery equipment technology, and in particular to a waste heat recovery and utilization device for kilns. Background Technology

[0002] Kilns are core thermal equipment in industries such as ceramics, building materials, metallurgy, and chemicals, and their energy consumption accounts for a significant proportion of industrial production. In actual production, the flue gas temperature of kilns is usually high (reaching 200℃-500℃ or even higher), and the flue gas contains a large amount of waste heat. Effectively recovering this heat can have significant economic and social benefits in reducing enterprise energy consumption and carbon emissions.

[0003] Currently, common waste heat recovery technologies for kilns mainly employ shell-and-tube heat exchangers or heat pipe heat exchangers. Flue gas passes through the surface of the heat exchange tubes, transferring heat to the heat exchange medium (such as water, thermal oil, or air) flowing inside the tubes. The heated medium is then used for material drying, combustion air preheating, or domestic heating.

[0004] Because the high-temperature flue gas needs to directly enter the heat exchange equipment after exiting the kiln, the flue gas often carries a large amount of dust and fly ash. The finned tubes or bare tubes of traditional heat exchangers are easily covered by dust and sintered to form hard scale, which reduces the heat exchange efficiency. Existing technologies lack online dust removal and dust prevention structures. Secondly, the heat exchange tubes of traditional heat exchangers are in fixed positions, and the flue gas continuously washes over the same local area, which easily leads to uneven heating of the heat exchange tubes and failure to fully utilize the entire heat exchange area. In addition, when the heat exchange medium flows inside the tubes, the liquid temperature near the tube wall rises faster, while the liquid temperature in the center of the tube is lower, forming a temperature gradient. This temperature stratification weakens the overall heat exchange effect, and existing technologies lack structures to actively disturb the liquid inside the tubes. Therefore, in order to solve the above problems, a kiln waste heat recovery and utilization device is proposed. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a kiln waste heat recovery and utilization device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A kiln waste heat recovery and utilization device includes a filter box and a heat exchange box fixedly connected to one side. A dust removal component is set inside the filter box and includes a fixedly set filter screen. A support frame is vertically movable inside the filter screen. A brush roller is rotatably connected to the inside of the support frame. The brush roller is used to clean the dust on the surface of the filter screen. The circulating heat exchange mechanism is located inside the heat exchange box and includes several circulating components and regulating components; The circulation assembly includes a circulation inlet pipe and several circulation pipes arranged in a circular arc array. The circulation inlet pipe and several circulation pipes revolve around an axis and can rotate on their own axis to adjust the heat exchange contact surface. Several spiral stirring rods for stirring the liquid are rotatably arranged on the inner side of the circulation inlet pipe and several circulation pipes. The circulation inlet pipe and several circulation pipes are connected in series to form an inner liquid circulation path, and the several circulation assemblies are connected in series to form an outer liquid circulation path. The adjustment assembly includes rotating plates that are equidistantly rotatably disposed on the outside of the circulation inlet pipe and several circulation pipes. Adjustment arc rails are symmetrically fixedly connected to the outside of the rotating plates. Heat-conducting fins are slidably disposed on the outside of the adjustment arc rails. The angle of the heat-conducting fins is changed to adjust the airflow direction and convective heat transfer efficiency.

[0007] The above technical solution further includes: As a further optimization of the present invention, the dust removal assembly further includes a first mounting cabinet and a second mounting cabinet respectively fixedly connected to both sides of the filter box. A dust removal motor is fixedly installed on the top of the first mounting cabinet, and a dust removal screw is fixedly installed at the output end of the dust removal motor. The dust removal screw is rotatably connected to the inside of the first mounting cabinet, and a movable bearing plate is threadedly connected to the outer side of the dust removal screw. A driving bevel gear is rotatably connected to the movable bearing plate. The driving bevel gear and the dust removal screw are slidably engaged by a keyway. A driven bevel gear is meshed with the outer side of the driving bevel gear. The driven bevel gear is fixedly connected to the brush roller, and the movable bearing plate is fixedly connected to the support frame.

[0008] As a further optimization of the present invention, a guide column is fixedly connected to the inner side of the second mounting cabinet, and a sliding block is slidably arranged on the outer side of the guide column, and the other end of the support frame is fixedly connected to the sliding block; The outer side of the support frame is fixedly connected with several dust suction ports at equal intervals, and the inner side of the support frame is fixedly connected with several equally distributed levers. The levers are used to move the bristles of the brush roller, and the dust suction ports are used to generate negative pressure to suck out dust.

[0009] As a further optimization of the present invention, the circulation assembly further includes a second support plate and a third support plate fixedly connected to the top and bottom of the inner side of the heat exchange box, respectively. A plurality of second retaining plates and a first retaining plate are rotatably connected at equal intervals to the inner sides of the third support plate and the second support plate. A circulation inlet pipe and a plurality of second support pipes are rotatably connected to the second retaining plate. A second circulation connecting pipe is fixedly connected to the bottom of the circulation inlet pipe. A second connecting sleeve is rotatably connected to the top of the second support pipe. The plurality of second connecting sleeves are divided into multiple groups, and a second connecting ring pipe is connected between two second connecting sleeves in each group. The top of the second connecting sleeve is rotatably connected to the circulation pipe in a sealed manner. A second connecting pipe is fixedly connected to the inner side of the second support pipe and the circulation pipe. The second connecting pipe and the second connecting sleeve rotate relative to each other.

[0010] As a further optimization of the present invention, the top of the circulation inlet pipe and several circulation pipes are all sealed and rotatably connected to a first connecting sleeve. The top of one first connecting sleeve is sealed and rotatably connected to a circulation outlet short pipe. The tops of the remaining first connecting sleeves are sealed and rotatably connected to a first support pipe. The remaining first connecting sleeves are divided into multiple groups, and a first connecting ring pipe connects the two first connecting sleeves in each group. The circulation pipe and the first support pipe, the circulation inlet pipe and the first support pipe, and the circulation pipe and the circulation outlet short pipe are all fixedly connected to a first connecting pipe.

[0011] As a further optimization of the present invention, the inner sides of the circulation inlet pipe and the plurality of circulation pipes are rotatably connected to a stirring shaft, the inner sides of the first connecting pipe and the second connecting pipe are fixedly connected to a sealing plate, the sealing plate is rotatably connected to the stirring shaft, the outer side of the stirring shaft is symmetrically fixedly connected to a stirring support plate, the plurality of spiral stirring rods are fixedly connected between the two stirring support plates, the plurality of spiral stirring rods are equidistantly fixedly connected to a plurality of hoop plates, the inner side of the stirring shaft extending into the circulation outlet short pipe is provided with a liquid outlet hole, and the end of the stirring shaft extending to the outer side of the circulation pipe is connected to and installed with a first circulation connecting pipe.

[0012] As a further optimization of the present invention, a plurality of second transfer storage boxes are fixedly connected to the bottom inner side of the heat exchange box, and a second rotating plate is rotatably connected to the top of the second transfer storage box. The second rotating plate is rotatably connected to the second circulation connecting pipe. An inlet pipe is connected to the outside of one second transfer storage box, and the remaining second transfer storage boxes are divided into multiple groups, and a second conduit is connected between two second transfer storage boxes in each group. Several first transfer storage boxes are fixedly connected to the top inner side of the heat exchange box. The bottom of the first transfer storage box is rotatably connected to a first rotating plate. The first rotating plate is rotatably connected to the first circulation pipe. The first transfer storage box farthest from the liquid inlet pipe is connected to the liquid outlet pipe. The remaining first transfer storage boxes are divided into multiple groups, and a first conduit is connected between two first transfer storage boxes in each group.

[0013] As a further optimization of the present invention, a heat exchange motor is fixedly installed on the top of the outer side of the heat exchange box, an adjustment shaft is fixedly connected to the inner side of the first plate, and the adjustment shaft is rotatably connected to the top of the heat exchange box. A stirring sprocket is symmetrically fixedly connected to the outer side of the adjustment shaft, and a stirring chain is sleeved between two adjacent stirring sprockets, and the two stirring chains are interlaced. The output end of the heat exchange motor is drivenly connected to an adjustment shaft.

[0014] As a further optimization of the present invention, a first support plate is fixedly connected to the inner side of the heat exchange box, and a fixing ring is fixedly connected at equal intervals to the inner side of the first support plate. A stirring gear ring and a heat exchange gear ring are fixedly connected to the inner side of the fixing ring. A stirring gear is fixedly connected to the outer side of the end of the stirring shaft near the fixing ring. The stirring gear ring meshes with multiple stirring gears. Heat exchange gears are fixedly connected to the top of the circulation outlet short pipe and several first support pipes. The heat exchange gear ring meshes with multiple heat exchange gears.

[0015] As a further optimization of the present invention, the adjustment assembly further includes an adjustment motor fixed to the side of the heat exchange box. Rotating columns are fixedly connected to both sides of the heat-conducting fins. An adjustment sprocket is symmetrically fixedly connected to one end of the rotating column extending to the outside of the heat exchange box. An adjustment chain is sleeved between two adjacent adjustment sprockets. The two adjacent adjustment sprockets are staggered. The output end of the adjustment motor is connected to one adjustment sprocket for transmission. Rotating rings are equidistantly rotatably connected to the outer sides of the circulation inlet pipe and several circulation pipes. Several nested slots are equidistantly opened on the heat-conducting fins. Sliding ears are symmetrically fixedly connected to the inner side of the nested slots. The sliding ears are slidably connected to the adjustment arc rail.

[0016] The present invention has the following beneficial effects: In this invention, the dust removal component can filter dust in the flue gas, preventing dust from adhering to the heat-conducting fins and affecting the heat exchange efficiency of the circulation inlet pipe and circulation pipe. Furthermore, the filter screen of the dust removal component can be automatically cleaned by the set brush roller, and the cleaned dust is sucked out by the external negative pressure device without affecting the ventilation effect of the filter screen.

[0017] In this invention, the rotation and revolution of the circulating inlet pipe and several circulating pipes are superimposed, which can continuously change the heated area of ​​the circulating inlet pipe and several circulating pipes during the heat exchange process, avoiding local overheating and the generation of heat exchange dead zones, and further improving heat exchange efficiency.

[0018] In this invention, the angle of the heat-conducting fins can be adjusted. During the adjustment process, the guiding effect of the heat-conducting fins on the flue gas and the air-receiving area can be changed, thereby adjusting the heat exchange intensity according to the actual operating power of the kiln. The tilt angle is increased at low load to enhance heat exchange, and the tilt angle is decreased at high load to reduce flow resistance, so that the device can maintain efficient and stable operation in the entire operating range.

[0019] In this invention, by connecting the circulation inlet pipe and several circulation pipes in series to form an S-shaped liquid circulation inner path, and by connecting multiple circulation components in series to form a liquid circulation outer path, the flow path of the heat exchange medium is extended within a limited space, and the number of heat exchange pipes is increased, thereby significantly improving the heat exchange efficiency per unit volume.

[0020] In this invention, both the inlet pipe and the circulation pipe are equipped with a spiral stirring rod. While the circulation component revolves, the spiral stirring rod is driven to rotate through the meshing action of the stirring tooth ring and the stirring gear, which continuously stirs the liquid in the pipe, effectively eliminating temperature stratification, making the liquid temperature distribution more uniform, and further enhancing the heat exchange effect.

[0021] In this invention, mechanical vibration can be generated by driving the heat-conducting fins to reciprocate and change their angle. At the same time, the flow direction and contact area of ​​the hot air are changed. The blowing force of the hot air itself helps to clean the dust attached to the surface of the heat-conducting fins, thereby improving the heat exchange efficiency of the fins and reducing the frequency of manual maintenance. Attached Figure Description

[0022] Figure 1 This is a top view schematic diagram of the overall structure of a kiln waste heat recovery and utilization device proposed in this invention; Figure 2 This is a schematic diagram of the overall bottom view structure in this invention; Figure 3 This is a schematic diagram of the internal structure of the heat exchange box and filter box in this invention; Figure 4 This is a schematic diagram of the dust removal component structure in this invention; Figure 5 This is a schematic diagram of the circulating heat exchange mechanism in this invention; Figure 6 This is a schematic diagram of the first structure of the loop component in this invention; Figure 7 This is a schematic diagram of the second structure of the loop component in this invention; Figure 8This is a schematic diagram of the third structure of the loop component in this invention; Figure 9 This is a schematic diagram of the fourth structure of the loop component in this invention; Figure 10 for Figure 8 Enlarged schematic diagram of the structure at point A in the middle; Figure 11 for Figure 9 Enlarged schematic diagram of the structure at point B; Adjustment components Figure 12 for Figure 9 Enlarged schematic diagram of the structure at point C.

[0023] In the diagram: 1. Air outlet; 10. Heat exchange box; 2. Filter box; 3. Heat exchange motor; 4. Adjusting motor; 20. Air inlet; 21. First mounting cabinet; 22. Second mounting cabinet; 23. Guide column; 24. Sliding block; 25. Support frame; 26. Dust suction interface; 27. Dust removal screw; 270. Dust removal motor; 28. Moving bearing plate; 29. ​​Driving bevel gear; 210. Driven bevel gear; 211. Brush roller; 212. Toggle lever; 2 13. Filter screen; 30. Liquid outlet pipe; 31. Liquid inlet pipe; 32. First transfer storage box; 302. First rotating plate; 33. First support plate; 330. Fixing ring; 3310. Stirring gear; 331. Stirring gear ring; 332. Heat exchange gear ring; 3320. Heat exchange gear; 34. Third support plate; 340. Second retaining plate; 35. Second support plate; 350. First retaining plate; 36. Second transfer storage box; 360. 37. Second guide tube; 38. First guide tube; 39. Adjusting shaft; 310. Stirring chain; 311. Stirring sprocket; 312. Circulation pipe; 313. Circulation inlet pipe; 314. Second circulation connecting pipe; 315. Second connecting sleeve; 3150. Second connecting ring pipe; 316. Second support pipe; 317. First connecting sleeve; 3170. First connecting ring pipe; 318. First support pipe; 319. Circulation outlet short pipe 320. Spiral stirring rod; 3200. Hoop plate; 321. First connecting pipe; 322. Sealing plate; 323. Stirring support plate; 324. Liquid outlet; 325. First circulation connecting pipe; 326. Second connecting pipe; 327. Stirring shaft; 40. Heat-conducting fins; 41. Rotating column; 42. Adjusting sprocket; 43. Adjusting chain; 44. Rotating plate; 45. Rotating ring; 46. Adjusting arc rail; 47. Nested groove; 48. Sliding lug. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Example 1 like Figures 1-12 As shown, the present invention proposes a kiln waste heat recovery and utilization device, including a filter box 2 and a heat exchange box 10 fixedly connected to one side. The dust removal component is arranged inside the filter box 2, including a fixedly arranged filter screen 213. A support frame 25 is vertically movable inside the filter screen 213. A brush roller 211 is rotatably connected to the inside of the support frame 25. The brush roller 211 is used to clean the dust on the surface of the filter screen 213. The circulating heat exchange mechanism is located inside the heat exchange box 10 and includes several circulating components and regulating components; The circulation assembly includes a circulation inlet pipe 313 and several circulation pipes 312 arranged in a circular arc array. The circulation inlet pipe 313 and several circulation pipes 312 revolve around an axis and can rotate on their own axis to adjust the heat exchange contact surface. Several spiral stirring rods 320 for stirring the liquid are rotatably arranged on the inner side of the circulation inlet pipe 313 and several circulation pipes 312. The circulation inlet pipe 313 and several circulation pipes 312 are connected in series to form an inner liquid circulation path, and several circulation assemblies are connected in series to form an outer liquid circulation path. The adjustment assembly includes a rotating plate 44 equidistantly rotatably disposed on the outside of the circulation inlet pipe 313 and several circulation pipes 312. An adjustment arc rail 46 is symmetrically fixedly connected to the outside of the rotating plate 44. A heat-conducting fin 40 is slidably disposed on the outside of the adjustment arc rail 46. The angle of the heat-conducting fin 40 is changed to adjust the airflow direction and convective heat transfer efficiency.

[0026] This design firstly filters dust from the flue gas through a dust removal component, preventing dust from adhering to the heat-conducting fins 40 and affecting the heat exchange efficiency of the circulation inlet pipe 313 and several circulation pipes 312. Furthermore, the filter screen 213 of the dust removal component can be automatically cleaned by a brush roller 211. The cleaned dust is sucked out by an external negative pressure device, which will not affect the ventilation effect of the filter screen 213. Furthermore, this design, through the superposition of the rotation and revolution of the circulation inlet pipe 313 and several circulation pipes 312, can change the heat-receiving area of ​​the circulation inlet pipe 313 and several circulation pipes 312 during the heat exchange process, thereby further improving the heat exchange efficiency. Furthermore, the angle of the heat-conducting fins 40 in this design is adjustable. During the adjustment process, the wind resistance of the heat-conducting fins 40 can be changed, increasing the turbulence of the flue gas flow and enhancing heat exchange. Depending on the actual operating power of the furnace, if the furnace operating power is high and the flue gas temperature is high, the tilt angle of the heat-conducting fins 40 can be appropriately reduced to decrease the flow resistance of the airflow and thus accelerate the circulation of hot air. If the furnace operating power is low and the flue gas temperature is low, the tilt angle of the heat-conducting fins 40 can be appropriately increased to improve the convective heat exchange efficiency and the heat exchange efficiency of the circulation inlet pipe 313 and several circulation pipes 312.

[0027] Example 2 like Figures 1-4 As shown, based on Embodiment 1, in this embodiment, an air outlet 1 is fixedly connected to the side of the heat exchange box 10 away from the filter box 2. The air outlet 1 serves as the outlet for the flue gas after heat exchange. The air inlet 20 is fixed at the other end of the filter box, and the hot air discharged from the furnace enters the heat exchange box 10 from here. The filter screen 213 is installed at the fixed connection between the heat exchange box 10 and the filter box 2.

[0028] The dust removal assembly also includes a first mounting cabinet 21 and a second mounting cabinet 22 that are fixedly connected to both sides of the filter box 2. The first mounting cabinet 21 and the second mounting cabinet 22 are equipped with devices that can generate air curtains to prevent dust in the flue gas from entering the first mounting cabinet 21 and the second mounting cabinet 22 during operation.

[0029] A dust removal motor 270 is fixedly installed on the top of the first mounting cabinet 21. A dust removal screw 27 is fixedly installed at the output end of the dust removal motor 270. The dust removal screw 27 is rotatably connected to the inside of the first mounting cabinet 21. A movable bearing plate 28 is threadedly connected to the outside of the dust removal screw 27. A driving bevel gear 29 is rotatably connected to the movable bearing plate 28. The driving bevel gear 29 and the dust removal screw 27 are slidably engaged by a keyway. A driven bevel gear 210 is meshed with the outside of the driving bevel gear 29. The driven bevel gear 210 is fixedly connected to the brush roller 211. The movable bearing plate 28 is fixedly connected to the support frame 25.

[0030] The dust removal assembly can operate while the heat exchange box 10 is in operation. The dust removal motor 270 drives the dust removal screw 27 to rotate. Through the threaded engagement between the dust removal screw 27 and the movable bearing plate 28, the movable bearing plate 28 is driven to move vertically. At the same time, the driving bevel gear 29 can slide on the dust removal screw 27 using a slot key and can rotate synchronously with it. Through the meshing of the driving bevel gear 29 and the driven bevel gear 210, the brush roller 211 can be driven to adhere to the filter screen 213 for rolling brushing. With this design, the faster the speed of the dust removal motor 270 at the output end, the faster the rotation speed of the brush roller 211 will be.

[0031] The inner side of the second mounting cabinet 22 is fixedly connected to a guide column 23, and a sliding block 24 is slidably provided on the outer side of the guide column 23. The other end of the support frame 25 is fixedly connected to the sliding block 24. The outer side of the support frame 25 is fixedly connected with several dust suction ports 26 at equal intervals, and the inner side of the support frame 25 is fixedly connected with several equally distributed levers 212. The levers 212 are used to move the bristles of the brush roller 211, and the dust suction ports 26 are used to generate negative pressure to suck out dust.

[0032] Furthermore, the guide column 23 plays a guiding and limiting role in the process of the moving bearing plate 28 driving the support frame 25 to move. The brush bristles of the brush roller 211 can be made of high-temperature resistant, high-strength non-metallic material, and the mesh count of the filter screen 213 needs to be controlled to be greater than 100 mesh.

[0033] Furthermore, the bristles of the brush roller 211 can scrape off the dust attached to the filter screen 213 and bring it into the inner side of the support frame 25. The inner side of the support frame 25 can generate negative pressure by using a negative pressure device connected to the dust suction port 26. When the bristles of the brush roller 211 pass the lever 212, it can block the bristles of the brush roller 211, causing it to swing and vibrate, thereby shaking off the dust attached to it. The dust is then absorbed by the dust suction port 26 and removed by the external dust collection bag.

[0034] Example 3 like Figures 5-12 As shown, based on the above embodiments, in this embodiment, the circulation component further includes a second support plate 35 and a third support plate 34 that are fixedly connected to the top and bottom of the inner side of the heat exchange box 10, respectively. The inner sides of the third support plate 34 and the second support plate 35 are respectively rotatably connected with a plurality of second retaining plates 340 and first retaining plates 350 at equal intervals. The second retaining plate 340 is rotatably connected to a circulation inlet pipe 313 and several second support pipes 316. The bottom of the circulation inlet pipe 313 is fixedly connected to a second circulation connecting pipe 314. The top of the second support pipe 316 is rotatably and sealingly connected to a second connecting sleeve 315. The several second connecting sleeves 315 are divided into multiple groups, and a second connecting ring pipe 3150 connects the two second connecting sleeves 315 in each group. The top of the second connecting sleeve 315 is rotatably and sealingly connected to the circulation pipe 312. The inner side of the second support pipe 316 and the circulation pipe 312 are fixedly connected to a second connecting pipe 326. The second connecting pipe 326 and the second connecting sleeve 315 rotate relative to each other.

[0035] Furthermore, the number of circulation components in this design can be even or odd. If it is odd, the inlet pipe 31 and the outlet pipe 30 are located at different heights, and vice versa. The circulation inlet pipe 313 and several circulation pipes 312 of each circulation component are connected in series to form an internal circulation channel. The top of the circulation inlet pipe 313 and several circulation pipes 312 are all sealed and rotatably connected to a first connecting sleeve 317. The top of one first connecting sleeve 317 is sealed and rotatably connected to a circulation outlet short pipe 319. The top of the remaining first connecting sleeves 317 is sealed and rotatably connected to a first support pipe 318. The remaining first connecting sleeves 317 are divided into multiple groups, and a first connecting ring pipe 3170 is connected between two first connecting sleeves 317 in each group. The circulation pipe 312 and the first support pipe 318, the circulation inlet pipe 313 and the first support pipe 318, and the circulation pipe 312 and the circulation outlet short pipe 319 are all fixedly connected to a first connecting pipe 321. Furthermore, in the internal circulation channel, the liquid first flows inside the circulation inlet pipe 313, enters the first connecting sleeve 317 at the top of the circulation inlet pipe 313 into the first connecting ring pipe 3170, then enters another adjacent first connecting sleeve 317, and then flows through the circulation pipe 312 at the bottom of the first connecting sleeve 317. The bottom of the circulation pipe 312 is provided with a second connecting sleeve 315 and a second connecting ring pipe 3150 of the same structure. In this way, the circulation inlet pipe 313 and several circulation pipes 312 are connected in series, presenting an S-shaped flow path. Compared with the traditional finned tube heat exchanger, this design can increase the number of heat exchange tubes within the same area, extend the flow path of the liquid, and improve the heat exchange efficiency.

[0036] Furthermore, the number of circulation inlet pipes 313 in the circulation assembly is one, and the number of circulation pipes 312 is an even number. If the number of circulation pipes 312 is 2N, then the number of the first connecting ring pipes 3170 and the second connecting ring pipes 3150 is N, the number of the second connecting sleeves 315 and the first connecting sleeves 317 is 2N, and the number of circulation outlet short pipes 319 is one. The circulation outlet short pipe 319 is installed on a circulation pipe 312 close to the circulation inlet pipe 313. Since the circulation inlet pipe 313 and several circulation pipes 312 are arranged in a circular array, and since the series flow path enters from the circulation inlet pipe 313, it needs to flow out from the circulation outlet short pipe 319, that is, a circulation pipe 312 close to the circulation inlet pipe 313.

[0037] Furthermore, the second connecting pipe 326 and the first connecting pipe 321 are used to connect the upper and lower structures of the circulation inlet pipe 313 and the circulation pipe 312, ensuring that the first support pipe 318, the circulation pipe 312 and the second support pipe 316 form an integral structure from the inside and can rotate synchronously.

[0038] Furthermore, such as Figure 12As shown, the second connecting pipe 326 has the same structure as the first connecting pipe 321. The first connecting pipe 321 has an opening with the same diameter as the first connecting ring pipe 3170. The first connecting pipe 321 and the first connecting sleeve 317 rotate relative to each other. During the heat exchange operation, the first connecting ring pipe 3170 only revolves. Therefore, when the opening of the first connecting pipe 321 overlaps with the first connecting ring pipe 3170, the liquid passes through the first connecting ring pipe 3170. Conversely, the liquid stays inside the circulation inlet pipe 313 and the circulation pipe 312, and exchanges heat with the outside hot air to increase the residence time.

[0039] Several second transfer storage boxes 36 are fixedly connected to the bottom inner side of the heat exchange box 10. The top of the second transfer storage box 36 is rotatably connected to a second rotating plate 360. The second rotating plate 360 ​​is rotatably connected to the second circulation connecting pipe 314. An inlet pipe 31 is connected to the outside of one second transfer storage box 36. The remaining second transfer storage boxes 36 are divided into multiple groups, and a second conduit 37 is connected between two second transfer storage boxes 36 in each group. Several first transfer storage boxes 32 are fixedly connected to the top inner side of the heat exchange box 10. The bottom of the first transfer storage box 32 is rotatably connected to a first rotating plate 302. The first rotating plate 302 is rotatably connected to the first circulation connecting pipe 325. The first transfer storage box 32 farthest from the liquid inlet pipe 31 is connected to the liquid outlet pipe 30. The remaining first transfer storage boxes 32 are divided into multiple groups, and a first conduit 38 is connected between two first transfer storage boxes 32 in each group.

[0040] Furthermore, such as Figure 5 As shown, for the external circulation of the liquid flow channel, this design uses an odd number of circulation components. Therefore, the liquid enters from the inlet pipe 31, first enters the second transfer storage tank 36 connected to it, enters the second circulation connecting pipe 314 from the second rotating plate 360 ​​on the second transfer storage tank 36, and then enters the circulation inlet pipe 313 to begin entering the inner circulation flow channel. Furthermore, the liquid then enters the first circulation connecting pipe 325 from the outlet hole 324 on the stirring shaft 327 inside the circulation outlet short pipe 319, and then enters the first transfer storage tank 32. There are two first transfer storage tanks 32 in a group, and the two adjacent first transfer storage tanks 32 are connected by the first conduit 38. Each group is not interconnected with each other. Similarly, each group of second transfer storage tanks 36 is not interconnected with each other. After entering the other first transfer storage tank 32, the liquid then enters the first circulation connecting pipe 325 from the outlet hole 324 on the stirring shaft 327 inside the circulation outlet short pipe 319, and then enters the circulation pipe 312 at the bottom of the circulation outlet short pipe 319 of the next circulation component, and then flows out from the circulation inlet pipe 313 of the circulation component, and so on.

[0041] A stirring shaft 327 is rotatably connected to the inner side of the circulation inlet pipe 313 and several circulation pipes 312. A sealing plate 322 is fixedly connected to the inner side of the first connecting pipe 321 and the second connecting pipe 326. The sealing plate 322 is rotatably connected to the stirring shaft 327. A stirring support plate 323 is symmetrically fixedly connected to the outer side of the stirring shaft 327. Several spiral stirring rods 320 are fixedly connected between the two stirring support plates 323. Several hoop plates 3200 are fixedly connected at equal intervals between the spiral stirring rods 320. A liquid outlet hole 324 is opened on the inner side of the stirring shaft 327 extending into the circulation outlet short pipe 319. The end of the stirring shaft 327 extending to the outer side of the circulation pipe 312 is connected to the first circulation connecting pipe 325.

[0042] A heat exchange motor 3 is fixedly installed on the top of the outer side of the heat exchange box 10. An adjusting shaft 39 is fixedly connected to the inner side of the first retaining plate 350, and the adjusting shaft 39 is rotatably connected to the top of the heat exchange box 10. A stirring sprocket 311 is symmetrically fixedly connected to the outer side of the adjusting shaft 39. A stirring chain 310 is sleeved between two adjacent stirring sprockets 311, and the two stirring chains 310 are interlaced. The output end of the heat exchange motor 3 is connected to an adjusting shaft 39 for transmission.

[0043] A first support plate 33 is fixedly connected to the inner side of the heat exchange box 10. A fixing ring 330 is fixedly connected at equal intervals to the inner side of the first support plate 33. A stirring gear ring 331 and a heat exchange gear ring 332 are fixedly connected to the inner side of the fixing ring 330. A stirring gear 3310 is fixedly connected to the outer side of the end of the stirring shaft 327 near the fixing ring 330. The stirring gear ring 331 meshes with multiple stirring gears 3310. A heat exchange gear 3320 is fixedly connected to the top of the circulation outlet short pipe 319 and several first support pipes 318. The heat exchange gear ring 332 meshes with multiple heat exchange gears 3320.

[0044] Furthermore, in order to improve the heat exchange efficiency of the circulation inlet pipe 313 and the circulation pipe 312, change their heating surface, and intensify the movement of the water flow inside them, the heat exchange motor 3 drives the adjusting shaft 39 to rotate. The adjusting shaft 39 is fixedly connected to the first retaining plate 350. The circulation outlet short pipe 319 and several first support pipes 318 are rotatably connected to the first retaining plate 350, so that the circulation inlet pipe 313 and the circulation pipe 312 revolve around the adjusting shaft 39. Through the mutual meshing of the stirring gear ring 331 and the stirring gear 3310, the spiral stirring rod 320 is driven to stir the liquid in the circulation inlet pipe 313 and the circulation pipe 312, thereby improving the uniformity of temperature. Furthermore, through the meshing action of the heat exchange gear ring 332 and the heat exchange gear 3320, the self-rotation of the circulation inlet pipe 313 and the circulation pipe 312 is realized, thereby continuously changing the heat exchange surface of the circulation inlet pipe 313 and the circulation pipe 312 and improving the heat exchange efficiency. Furthermore, the gear ratios of the stirring ring 331, stirring gear 3310, heat exchange ring 332, and heat exchange gear 3320 are different, so that even during the revolution of the circulation inlet pipe 313 and the circulation pipe 312, the spiral stirring rod 320 can generate relative motion with them, thereby achieving the stirring effect.

[0045] Example 4 like Figure 5 and Figure 7 As shown, based on the above embodiments, in this embodiment, the adjustment assembly further includes an adjustment motor 4 fixed to the side of the heat exchange box 10. Rotating columns 41 are fixedly connected to both sides of the heat-conducting fins 40. An adjustment sprocket 42 is symmetrically fixedly connected to one end of the rotating column 41 extending to the outside of the heat exchange box 10. An adjustment chain 43 is sleeved between two adjacent adjustment sprockets 42. The two adjacent adjustment sprockets 42 are staggered. The output end of the adjustment motor 4 is connected to one adjustment sprocket 42. Rotating rings 45 are equidistantly rotatably connected to the outer sides of the circulation inlet pipe 313 and several circulation pipes 312. Several nested grooves 47 are equidistantly opened on the heat-conducting fins 40. Sliding ears 48 are symmetrically fixedly connected to the inner side of the nested grooves 47. The sliding ears 48 are slidably connected to the adjustment arc rail 46. Furthermore, the function of the heat-conducting fins 40 is: on the one hand, to absorb the temperature of the flue gas and maintain the internal temperature of the heat exchange box 10; on the other hand, there is a certain heat transfer between the heat-conducting fins 40 and the circulation inlet pipe 313 and the circulation pipe 312, which can improve the heat exchange efficiency of the liquid. During the adjustment of the tilt angle of the heat-conducting fins 40, the power transmission of the driving motor 4 through the adjusting sprocket 42 and the adjusting chain 43 synchronously drives all the heat-conducting fins 40 to rotate. Since the adjusting arc rail 46 is set to be circular, the heat-conducting fins 40 can slide on it. When the angle of the heat-conducting fins 40 changes, it has a guiding effect on the hot air and can change the direction of the hot air. On the one hand, it can reduce the heat exchange dead angle that may exist in the circulation inlet pipe 313 and the circulation pipe 312. On the other hand, the change of the angle of the heat-conducting fins 40 can change its contact surface with the hot air, increase its resistance to the flue gas flow, enhance heat exchange, and maintain the internal temperature of the heat exchange box 10. Furthermore, the reciprocating change of the angle of the driving heat-conducting fins 40 can generate mechanical vibration. At the same time, the contact area between them and the hot air increases, the resistance to the hot air is enhanced, and the blowing force generated by the hot air helps to clean the dust attached to the surface of the heat-conducting fins 40, thereby improving their own heat exchange efficiency.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A kiln waste heat recycling device, comprising a filter box (2) and a heat exchange box (10) fixedly connected on one side of the filter box (2), characterized in that, The dust removal assembly is located inside the filter box (2) and includes a fixed filter screen (213). A support frame (25) is vertically movable inside the filter screen (213). A brush roller (211) is rotatably connected inside the support frame (25). The brush roller (211) is used to clean the dust on the surface of the filter screen (213). The circulating heat exchange mechanism is located inside the heat exchange box (10) and includes several circulating components and regulating components; The circulation assembly includes a circulation inlet pipe (313) and several circulation pipes (312) arranged in a circular arc array. The circulation inlet pipe (313) and several circulation pipes (312) revolve around an axis, and the circulation inlet pipe (313) and several circulation pipes (312) can rotate on their own axis to adjust the heat exchange contact surface. Several spiral stirring rods (320) for stirring the liquid are rotatably arranged on the inner side of the circulation inlet pipe (313) and several circulation pipes (312). The circulation inlet pipe (313) and several circulation pipes (312) are connected in series to form an inner liquid circulation path, and the several circulation assemblies are connected in series to form an outer liquid circulation path. The adjustment assembly includes a rotating plate (44) equidistantly rotatably disposed on the outside of the circulation inlet pipe (313) and several circulation pipes (312). An adjustment arc rail (46) is symmetrically fixedly connected to the outside of the rotating plate (44). A heat-conducting fin (40) is slidably disposed on the outside of the adjustment arc rail (46). The angle of the heat-conducting fin (40) is changed to adjust the airflow direction and convective heat transfer efficiency.

2. A kiln waste heat recovery and utilization device according to claim 1, characterized in that, The dust removal assembly also includes a first mounting cabinet (21) and a second mounting cabinet (22) fixedly connected to both sides of the filter box (2). A dust removal motor (270) is fixedly installed on the top of the first mounting cabinet (21). A dust removal screw (27) is fixedly installed at the output end of the dust removal motor (270). The dust removal screw (27) is rotatably connected to the inside of the first mounting cabinet (21). A movable bearing plate (28) is threadedly connected to the outside of the dust removal screw (27). An active bevel gear (29) is rotatably connected to the movable bearing plate (28). The active bevel gear (29) and the dust removal screw (27) slide together through a slot key. A driven bevel gear (210) is meshed with the outside of the active bevel gear (29). The driven bevel gear (210) is fixedly connected to the brush roller (211). The movable bearing plate (28) is fixedly connected to the support frame (25).

3. A kiln waste heat recovery and utilization device according to claim 2, characterized in that, The inner side of the second mounting cabinet (22) is fixedly connected to a guide column (23), and a sliding block (24) is slidably provided on the outer side of the guide column (23). The other end of the support frame (25) is fixedly connected to the sliding block (24). The outer side of the support frame (25) is fixedly connected with several dust suction ports (26) at equal intervals, and the inner side of the support frame (25) is fixedly connected with several equally distributed levers (212). The levers (212) are used to move the bristles of the brush roller (211), and the dust suction ports (26) are used to generate negative pressure to suck out dust.

4. The kiln waste heat recovery and utilization device according to claim 1, characterized in that, The circulation assembly further includes a second support plate (35) and a third support plate (34) fixedly connected to the top and bottom of the inner side of the heat exchange box (10), respectively. A plurality of second retaining plates (340) and a first retaining plate (350) are rotatably connected at equal intervals to the inner sides of the third support plate (34) and the second support plate (35). A circulation inlet pipe (313) and a plurality of second support pipes (316) are rotatably connected to the second retaining plate (340). A second circulation connecting pipe (314) is fixedly connected to the bottom of the circulation inlet pipe (313). The second support pipes (316) The top of the second connecting sleeve (315) is sealed and rotatably connected to the second connecting sleeve (316). Several second connecting sleeves (315) are divided into multiple groups, and a second connecting ring pipe (3150) is connected between two second connecting sleeves (315) in each group. The top of the second connecting sleeve (315) is sealed and rotatably connected to the circulation pipe (312). The inner side of the second support pipe (316) and the circulation pipe (312) are fixedly connected to the second connecting pipe (326). The second connecting pipe (326) and the second connecting sleeve (315) rotate relative to each other.

5. A kiln waste heat recovery and utilization device according to claim 4, characterized in that, The top of the circulation inlet pipe (313) and several circulation pipes (312) are all sealed and rotatably connected to a first connecting sleeve (317). The top of one first connecting sleeve (317) is sealed and rotatably connected to a circulation outlet short pipe (319). The top of the remaining first connecting sleeves (317) is sealed and rotatably connected to a first support pipe (318). The remaining first connecting sleeves (317) are divided into multiple groups, and a first connecting ring pipe (3170) connects the two first connecting sleeves (317) in each group. The circulation pipe (312) and the first support pipe (318), the circulation inlet pipe (313) and the first support pipe (318), and the circulation pipe (312) and the circulation outlet short pipe (319) are all fixedly connected to a first connecting pipe (321).

6. A kiln waste heat recovery and utilization device according to claim 5, characterized in that, The inner sides of the circulation inlet pipe (313) and several circulation pipes (312) are rotatably connected to a stirring shaft (327). The inner sides of the first connecting pipe (321) and the second connecting pipe (326) are fixedly connected to a sealing plate (322). The sealing plate (322) is rotatably connected to the stirring shaft (327). The outer side of the stirring shaft (327) is symmetrically fixedly connected to a stirring support plate (323). Several spiral stirring rods (320) are fixedly connected between two stirring support plates (323). Several hoop plates (3200) are fixedly connected at equal intervals between several spiral stirring rods (320). The inner side of the stirring shaft (327) extending into the circulation outlet short pipe (319) is provided with a liquid outlet hole (324). One end of the stirring shaft (327) extending to the outer side of the circulation pipe (312) is connected to a first circulation connecting pipe (325).

7. A kiln waste heat recovery and utilization device according to claim 6, characterized in that, The heat exchange box (10) has several second transfer storage boxes (36) fixedly connected to its inner bottom. The top of the second transfer storage box (36) is sealed and rotatably connected to a second rotating plate (360). The second rotating plate (360) is rotatably connected to the second circulation pipe (314). The outside of one second transfer storage box (36) is connected to an inlet pipe (31). The remaining second transfer storage boxes (36) are divided into multiple groups, and a second conduit (37) connects the two second transfer storage boxes (36) in each group. The heat exchange box (10) has several first transfer storage boxes (32) fixedly connected to its inner top. The bottom of the first transfer storage box (32) is rotatably connected to a first rotating plate (302). The first rotating plate (302) is rotatably connected to the first circulation pipe (325). The first transfer storage box (32) farthest from the liquid inlet pipe (31) is connected to the liquid outlet pipe (30). The remaining first transfer storage boxes (32) are divided into multiple groups, and each group of two first transfer storage boxes (32) is connected to a first conduit (38).

8. A kiln waste heat recovery and utilization device according to claim 7, characterized in that, A heat exchange motor (3) is fixedly installed on the top of the outer side of the heat exchange box (10). An adjusting shaft (39) is fixedly connected to the inner side of the first retaining plate (350), and the adjusting shaft (39) is rotatably connected to the top of the heat exchange box (10). A stirring sprocket (311) is symmetrically fixedly connected to the outer side of the adjusting shaft (39). A stirring chain (310) is sleeved between two adjacent stirring sprockets (311), and the two stirring chains (310) are interlaced. The output end of the heat exchange motor (3) is connected to an adjusting shaft (39) for transmission.

9. A kiln waste heat recovery and utilization device according to claim 8, characterized in that, A first support plate (33) is fixedly connected to the inner side of the heat exchange box (10). A fixing ring (330) is fixedly connected at equal intervals to the inner side of the first support plate (33). A stirring gear ring (331) and a heat exchange gear ring (332) are fixedly connected to the inner side of the fixing ring (330). A stirring gear (3310) is fixedly connected to the outer side of the end of the stirring shaft (327) near the fixing ring (330). The stirring gear ring (331) meshes with multiple stirring gears (3310). A heat exchange gear (3320) is fixedly connected to the top of the circulation outlet short pipe (319) and several first support pipes (318). The heat exchange gear ring (332) meshes with multiple heat exchange gears (3320).

10. A kiln waste heat recovery and utilization device according to claim 1, characterized in that, The adjustment assembly also includes an adjustment motor (4) fixed to the side of the heat exchange box (10). Rotating columns (41) are fixedly connected to both sides of the heat-conducting fins (40). An adjustment sprocket (42) is symmetrically fixedly connected to one end of the rotating column (41) extending to the outside of the heat exchange box (10). An adjustment chain (43) is sleeved between two adjacent adjustment sprockets (42). The two adjacent adjustment sprockets (42) are staggered. The output end of the adjustment motor (4) is connected to one adjustment sprocket (42) for transmission. Rotating rings (45) are equidistantly rotatably connected to the outside of the circulation inlet pipe (313) and several circulation pipes (312). Several nested grooves (47) are equidistantly opened on the heat-conducting fins (40). Sliding ears (48) are symmetrically fixedly connected to the inside of the nested grooves (47). The sliding ears (48) are slidably connected to the adjustment arc rail (46).

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