Waste heat utilization device of solid waste treatment rotary kiln

Abstract

The invention provides a solid waste treatment rotary kiln waste heat utilization device, and belongs to the field of rotary kilns, the solid waste treatment rotary kiln waste heat utilization device comprises a rotary kiln body and a waste heat power generation assembly, and the waste heat power generation assembly comprises a preheating water supply tank, a hot water tank, a first exhaust fan, a transmission part, a steam turbine and a power generator. Firstly, through the design of preheating treatment and continuous water replenishing, preheated water can be replenished to the hot water tank in time, and water supply continuity is guaranteed; steam generated by the hot water tank is efficiently utilized to drive the steam turbine to generate electricity, and heat energy is converted into electric energy; and thirdly, due to the design that the first exhaust fan is immersed in water, the fans can be effectively cooled, the deformation risk in the high-temperature environment is reduced, the operation stability of equipment is improved, finally, the system achieves recycling of flue gas waste heat, heat energy waste is remarkably reduced, and the resource utilization efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of rotary kilns, and more specifically, to a device for utilizing waste heat from a rotary kiln in solid waste treatment. Background Technology

[0002] Rotary kilns for solid waste treatment are core equipment for the harmless, reduced-volume, and resource-based disposal of hazardous waste and bulk solid waste. Their flue gas temperature directly determines the degradation efficiency of solid waste and the complete removal of pollutants, and also plays a crucial role in the safe and stable operation of subsequent flue gas purification systems. However, the flue gas from these rotary kilns generally has a high temperature. If this heat energy cannot be efficiently recovered and rationally utilized, a large amount of valuable heat energy will be wasted, reducing energy efficiency and failing to meet the requirements of green and low-carbon industry development. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a waste heat recovery device for rotary kilns in solid waste treatment, which can reuse the temperature in the flue gas of the rotary kiln, effectively reducing the waste of thermal energy and improving the utilization rate of resources.

[0004] A waste heat utilization device for a rotary kiln in solid waste treatment according to an embodiment of this application includes: a rotary kiln body, a smoke chamber provided on one side of the rotary kiln body, and a pulverized coal injection pipe provided on the other side of the rotary kiln body; and a waste heat power generation assembly, which includes a preheating water supply tank, a hot water tank, a first exhaust fan, a transmission component, a steam turbine, and a generator. The preheating end of the preheating water supply tank is fixedly connected to the interior of the smoke chamber. Multiple first exhaust fans are provided, and each first exhaust fan is fixedly connected to the interior of the hot water tank. The preheating end of the preheating water supply tank is connected to the hot water tank. The input end of the first exhaust fan is connected to the smoke chamber, and the output end of the first exhaust fan extends to the exterior of the hot water tank. The transmission end of the transmission component is rotatably connected to the upper part of the hot water tank and is drively connected to the first exhaust fan. The steam turbine and the generator are symmetrically arranged and fixedly connected to one side of the rotary kiln body. The steam turbine is connected to the upper part of the hot water tank, and the rotating end of the steam turbine is drively connected to the generator.

[0005] According to an embodiment of this application, a waste heat recovery device for a rotary kiln in solid waste treatment has the following advantages: During use, water is first injected into the storage end of the preheating water supply tank. The storage end then transports the water to the preheating end of the preheating water supply tank. At this time, the flue gas chamber of the rotary kiln body emits high-temperature flue gas. The high-temperature flue gas first heats the water in the preheating end, completing the water preheating process. The preheated water is then transported to the hot water tank. Simultaneously, the transmission end of the transmission component drives the first exhaust fan to operate, extracting the high-temperature flue gas from the flue gas chamber. Since the first exhaust fan is entirely immersed in the water in the hot water tank, during the extraction of flue gas, it transfers the high temperature carried by the flue gas to the water in the hot water tank. Given that the temperature of the rotary kiln flue gas is higher than the boiling point of water, as the flue gas continuously passes through the first exhaust fan… A large amount of heat is continuously released into the water, eventually causing the water in the hot water tank to boil. The large amount of steam generated by boiling enters the steam turbine, driving it to rotate, which in turn drives the generator to generate electricity. The entire process has multiple advantages: First, through preheating and continuous water replenishment, preheated water can be replenished to the hot water tank in a timely manner, ensuring a continuous water supply. Second, the efficient use of steam generated in the hot water tank to drive the steam turbine generates electricity realizes the conversion of heat energy into electrical energy. Third, the design of the first exhaust fan being immersed in water can effectively cool the fan, reduce the risk of deformation under high temperature conditions, and improve the stability of equipment operation. Finally, the system realizes the recovery and reuse of waste heat from flue gas, significantly reducing heat energy waste and improving resource utilization efficiency.

[0006] In addition, a waste heat recovery device for solid waste treatment rotary kiln according to an embodiment of this application also has the following additional technical features: According to this application, the preheating water supply tank includes a water storage tank and a preheating tank. The water storage tank is fixedly connected to one side of the rotary kiln body, the preheating tank is fixedly connected to the interior of the smoke chamber, the water storage tank is connected to the preheating tank, and the preheating tank is connected to the hot water tank.

[0007] According to this application, a first water pipe is provided between the water storage tank and the preheating tank, and the first water pipe is equipped with a first solenoid valve; a second water pipe is provided between the preheating tank and the hot water tank, and the second water pipe is equipped with a second solenoid valve.

[0008] According to this application, the first exhaust fan includes a blower casing, a fan blade, a horizontal shaft, and a vertical shaft. The blower casing is fixedly connected to the interior of the hot water tank, the horizontal shaft is rotatably connected to the interior of the blower casing, the fan blade is fixedly connected to the horizontal shaft, the vertical shaft is rotatably connected to the blower casing, the bottom of the vertical shaft is drivenly connected to the horizontal shaft, and the upper part of the vertical shaft is drivenly connected to the transmission end of the transmission component.

[0009] According to this application, the transmission component includes a first motor, a gear set, and a transmission shaft. The first motor is fixedly connected to one side of the rotary kiln body. The gear set is rotatably connected to the rotary kiln body. One gear at the bottom of the gear set is fixedly connected to the output end of the first motor. The gear at the top of the gear set is fixedly connected to one end of the transmission shaft. The transmission shaft is rotatably connected to the upper part of the hot water tank and is drively connected to the longitudinal shaft.

[0010] According to this application, a first bevel gear is provided in the middle of the horizontal shaft, a second bevel gear is provided at the bottom of the vertical shaft, a third bevel gear is provided at the upper part of the vertical shaft, and a fourth bevel gear is provided on the transmission shaft. The first bevel gear is meshed with the second bevel gear, and the third bevel gear is meshed with the fourth bevel gear.

[0011] According to this application, the steam turbine includes an outer casing and an impeller, the impeller is rotatably connected inside the outer casing, the outer casing is fixedly connected to the rotary kiln body, the outer casing is connected to the hot water tank, and the impeller is drivenly connected to the generator.

[0012] According to this application, a connecting pipe is provided on one side of the outer casing, and a chimney is provided on the other side of the outer casing. The connecting pipe is fixedly connected to the upper part of the hot water tank.

[0013] According to this application, the impeller is provided with a first pulley, and the generator is provided with a second pulley, wherein the first pulley and the second pulley are connected in a driving connection.

[0014] According to this application, a power distribution cabinet is provided on one side of the rotary kiln body, and a battery pack is also provided on the rotary kiln body. The power distribution cabinet is electrically connected to the generator, the power distribution cabinet is electrically connected to the battery pack, and the power distribution cabinet is electrically connected to the first motor.

[0015] The flue gas emitted from rotary kilns must be filtered and dust removed before it can be discharged into the environment or recycled. The conventional treatment process is as follows: first, large dust particles in the flue gas are separated by a cyclone separator, and then fine dust is deeply filtered by the air permeability of the filter bags to ensure that the dust removal effect meets the standards. However, there are obvious limitations in practical applications: the inner wall of the filter bags easily adsorbs a large amount of dust, which needs to be replaced in time to maintain filtration efficiency; and the conventional filter bags are designed to be relatively short, resulting in a limited dust holding capacity. This not only requires frequent replacement, but also requires machine shutdown during replacement, which consumes a certain amount of time and ultimately causes a decrease in overall filtration efficiency.

[0016] According to this application, a filter assembly is also included, comprising a cyclone separator, a booster fan, a lifting frame, a ring barrel, a cloth tube, a gripper, a support plate, and a pulling member. The bottom of the cyclone separator is fixedly connected to the rotary kiln body, one side of the cyclone separator is connected to the output end of the first exhaust fan, the air outlet of the cyclone separator is connected to the input end of the booster fan, the output end of the booster fan is connected to the ring barrel, the ring barrel is fixedly connected to the lifting frame, the bottom of the lifting frame is fixedly connected to the rotary kiln body, one side of the cloth tube is folded and fitted over the outside of the ring barrel, the gripper is fixedly connected to the lifting end of the lifting frame, the gripping end of the gripper clamps the outside of the ring barrel, the gripping end clamps the cloth tube on the outer surface of one side of the ring barrel, the support plate is fixedly connected to the rotary kiln body, one side of the cloth tube is placed on the upper part of the support plate, and the pulling end of the pulling member hangs on one side of the cloth tube. Before using the equipment, fold one end of the cloth tube and place it over the outside of the ring barrel, leaving the other end unfolded. Then, the lifting end of the lifting frame drives the gripper to move up and down, the gripping end of the gripper opens and covers the outside of the ring barrel. Through the clamping action of the gripping end, the cloth tube is fixed to the outer wall of the ring barrel, completing the installation and fixing of the cloth tube. Simultaneously, connect the pulling end of the pulling component to the unfixed end of the cloth tube. During operation, the flue gas drawn by the first exhaust fan first enters the cyclone separator. After large dust particles are separated and removed, the flue gas is transported to the booster fan. The booster fan pressurizes the flue gas, then... The gas is fed into the inner ring of the filter cylinder, and then guided into the filter tube. As the flue gas passes through the filter tube, it filters out fine dust. When too much dust accumulates inside the filter tube or a large amount of dust adheres to the inner wall, affecting the filtration effect, the gripper releases its grip on the filter tube. At this time, the pulling end of the puller pulls the filter tube, pulling out the unused folded part from the outside of the filter cylinder for continued filtration of flue gas. This design eliminates the need to disassemble and replace the filter tube with dust, only requiring the unfolding of the folded spare filter tube. The entire process does not require machine downtime, avoiding the time loss caused by stopping the machine to change bags, and effectively improving filtration efficiency.

[0017] According to this application, the lifting frame includes a first frame, a second frame, and a telescopic component. The bottom of the second frame and the bottom of the telescopic component are both fixedly connected to the rotary kiln body. The first frame and the second frame are slidably connected internally. The output end of the telescopic component is fixedly connected to the first frame. The gripper is fixedly connected to the first frame.

[0018] According to this application, a raised ring is provided on one side of the ring barrel, an arc-shaped frame is provided on the gripper end, the cloth tube is sleeved outside the raised ring, and the arc-shaped frame clamps and adheres the cloth tube to the outer surface of the raised ring.

[0019] According to this application, the pulling component includes a second motor, a roller, a pull rope, a hook, and a guide wheel. A hanging ring is provided on one side of the cloth cylinder. The second motor is fixedly connected to one side of the rotary kiln body. The output end of the second motor is fixedly connected to the roller. The roller is rotatably connected to the rotary kiln body. One end of the pull rope is wound around the outside of the roller. The other end of the pull rope is fixedly connected to the hook via the guide wheel. The hook is hung inside the hanging ring. The guide wheel is rotatably connected to the rotary kiln body.

[0020] According to this application, the lifting frame, the ring barrel, the cloth tube, the gripper, the support plate, and the pulling member are all symmetrically arranged, and the output end of the booster fan is provided with a first three-ventilation pipe, and each of the two pipe ends of the first three-ventilation pipe is provided with a third solenoid valve.

[0021] According to this application, the booster fan is provided with a second and a third ventilation pipe, one end of which is connected to the cyclone separator, and the other end of which is provided with a flow control valve.

[0022] The discharge end of the rotary kiln, or kiln head, bears a dual key responsibility: on the one hand, it smoothly discharges qualified materials after high-temperature treatment; on the other hand, it is equipped with the combustion system, the core of the kiln's operation. To ensure complete combustion of fuel and improve overall combustion efficiency, oxygen-containing air needs to be continuously supplied to the combustion end of the combustion system to provide sufficient combustion-supporting conditions. However, the combustion-supporting efficiency of ambient temperature air is far less than that of preheated hot air. If ambient temperature air is used directly for combustion support, not only will the combustion reaction be incomplete due to the low temperature, but the combustion-supporting effect will also be weakened.

[0023] According to this application, it also includes a combustion-supporting component, which includes a cover box, a second exhaust fan, a heat absorption box, a heat absorption pipe, and a nozzle. An extension pipe is provided at the output end of the first exhaust fan, and the extension pipe passes through the interior of the heat absorption box. A heat dissipation structure is provided on the inner side of the extension pipe in the heat absorption box. Multiple covers are provided, and the covers are slidably connected to the support plate. One cover box is connected to the input end of the second exhaust fan, and the output end of the second exhaust fan is connected to one side of the heat absorption pipe. The heat absorption pipe is fixedly connected to the interior of the heat absorption box, and the other side of the heat absorption pipe is connected to the nozzle. The nozzle is fixedly connected to the coal injection pipe. After being filtered by the cloth tube, the flue gas diffuses to the periphery of the cloth tube. At this time, the cover box slides along the outside of the cloth tube and covers its exterior. Since the cover box is designed as a non-sealed structure, the oxygen-containing air outside it can naturally form a mixed airflow with the flue gas. During the sliding process of the cover box, when one of the cover boxes is connected to the input end of the second exhaust fan, the exhaust fan will simultaneously extract the mixed airflow inside the cover box, which contains both flue gas and oxygen-containing air. Considering that the flue gas carries residual heat, the extracted mixed airflow will be transported to the inside of the heat absorption tube. Through the heat exchange effect of the heat absorption tube in the heat absorption box, the airflow is heated. The heated air is finally transported to the nozzle fixedly connected to the pulverized coal injection pipe and sprayed out at high speed through the nozzle to complete the combustion operation. The entire operation process not only realizes the recovery and reuse of the residual heat of the flue gas, but also increases the temperature of the combustion air through the mixing and heating of the flue gas and oxygen-containing air, significantly optimizing the combustion effect and having the dual advantages of energy saving and efficiency improvement.

[0024] According to this application, the enclosure is symmetrically arranged, and a third ventilation pipe is provided at the input end of the second exhaust fan. A fourth solenoid valve is provided at each of the two pipe ends of the third ventilation pipe.

[0025] According to this application, the third ventilation duct is provided with a sleeve, and the cover box is provided with a connecting tube, one end of which is inserted into the sleeve. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a first-view structural schematic diagram of a waste heat recovery device for solid waste treatment rotary kiln provided in the embodiments of this application; Figure 2 A partial structural schematic diagram of the rotary kiln body provided for an embodiment of this application; Figure 3 A partial structural schematic diagram of the waste heat power generation component provided in the embodiments of this application; Figure 4 A partial structural schematic diagram from a first perspective of the first exhaust fan disassembled according to an embodiment of this application; Figure 5 A partial structural schematic diagram from a second perspective of the first exhaust fan disassembled according to an embodiment of this application; Figure 6 A schematic diagram of the disassembled steam turbine provided for an embodiment of this application; Figure 7A partial structural schematic diagram of the filtering component provided in the embodiments of this application; Figure 8 A partial structural schematic diagram of the lifting frame provided in the embodiments of this application; Figure 9 A partial structural schematic diagram of the tension member provided in the embodiments of this application; Figure 10 Provided for the implementation of this application Figure 9 A magnified schematic diagram of part of the structure in region A; Figure 11 A partial structural schematic diagram of the combustion-supporting component provided in an embodiment of this application, viewed from a first perspective. Figure 12 A partial structural schematic diagram of the combustion-supporting component provided in the embodiments of this application from a second perspective.

[0028] In the diagram: 100 - Rotary kiln body; 110 - Smoke chamber; 120 - Pulverized coal injection pipe; 130 - Electrical distribution cabinet; 140 - Battery pack; 200 - Waste heat power generation assembly; 210 - Preheating water supply tank; 211 - Water storage tank; 212 - Preheating box; 213 - First water pipe; 214 - First solenoid valve; 215 - Second water pipe; 216 - Second solenoid valve; 220 - Hot water tank; 230 - First exhaust fan; 231 - Air duct; 23 2-Wind blade; 233-Horizontal shaft; 234-Vertical shaft; 235-First bevel gear; 236-Second bevel gear; 237-Third bevel gear; 238-Extension pipe; 240-Transmission component; 241-First motor; 242-Gear set; 243-Drive shaft; 245-Fourth bevel gear; 250-Steam turbine; 251-Outer casing; 252-Impeller; 253-Connecting pipe; 254-Chimney; 256-First pulley; 60-Generator; 261-Second pulley; 300-Filter assembly; 310-Cyclone separator; 320-Booster fan; 321-First and third ventilation ducts; 322-Third solenoid valve; 323-Second and third ventilation ducts; 324-Flow control valve; 330-Lifting frame; 331-First frame; 332-Second frame; 333-Telescopic component; 340-Ring barrel; 341-Raised ring; 350-Cloth cylinder; 351-Hanging Ring; 360-Handle; 361-Arc-shaped frame; 370-Support plate; 380-Pull component; 381-Second motor; 382-Roller; 383-Pull rope; 384-Hook; 385-Guide wheel; 400-Combustion aid component; 410-Cover box; 411-Connecting pipe; 420-Second exhaust fan; 421-Third ventilation pipe; 422-Sleeve; 430-Heat absorption box; 440-Heat absorption pipe; 450-Air nozzle. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] The following description, with reference to the accompanying drawings, describes a waste heat utilization device for a rotary kiln in solid waste treatment according to an embodiment of this application.

[0031] like Figures 1-12 As shown, a waste heat utilization device for a rotary kiln in solid waste treatment according to an embodiment of this application includes a rotary kiln body 100, a smoke chamber 110 on one side of the rotary kiln body 100, a pulverized coal injection pipe 120 on the other side of the rotary kiln body 100, and also includes a waste heat power generation component 200.

[0032] The waste heat power generation component 200 includes a preheating water supply tank 210, a hot water tank 220, a first exhaust fan 230, a transmission component 240, a steam turbine 250, and a generator 260. The preheating end of the preheating water supply tank 210 is fixedly connected inside the smoke chamber 110. Multiple first exhaust fans 230 are provided, and each first exhaust fan 230 is fixedly connected inside the hot water tank 220. The preheating end of the preheating water supply tank 210 is connected to the hot water tank 220, and the input end of the first exhaust fan 230 is connected to the smoke chamber 110. The first exhaust fan 230 extends to the outside of the hot water tank 220. The transmission end of the transmission component 240 is rotatably connected to the upper part of the hot water tank 220, and the transmission end of the transmission component 240 is connected to the first exhaust fan 230. The steam turbine 250 and the generator 260 are symmetrically arranged. The steam turbine 250 and the generator 260 are fixedly connected to one side of the rotary kiln body 100. The steam turbine 250 is connected to the upper part of the hot water tank 220, and the rotating end of the steam turbine 250 is connected to the generator 260.

[0033] The working process of a waste heat utilization device for a rotary kiln in solid waste treatment according to a specific embodiment of this application is described below with reference to the accompanying drawings. First, when the rotary kiln body 100 is running, the high-temperature flue gas emitted from the smoke chamber 110 preheats the water in the preheating box 212 fixed in the smoke chamber 110. The water storage tank 211 continuously supplies cold water to the preheating box 212 through the first water pipe 213 and the first solenoid valve 214. The hot water preheated by the flue gas is stably transported to the hot water tank 220 through the second water pipe 215 and the second solenoid valve 216, providing a preheating water source for subsequent heat energy conversion. Then, the power distribution cabinet 130 controls the first motor 241 to start, and drives the first exhaust fan 230 to operate through the transmission component 240 composed of gear set 242 and transmission shaft 243, which draws the high-temperature flue gas in the smoke chamber 110 into the blower 231 immersed in the water body of the hot water tank 220; the heat carried by the flue gas is efficiently transferred to the water body through the blower 231, so that the preheated water body in the hot water tank 220 continues to heat up to boiling, generating a large amount of high-temperature and high-pressure water vapor; Finally, the steam generated in the hot water tank 220 enters the outer casing 251 of the steam turbine 250 through the connecting pipe 253, driving the impeller 252 to rotate at high speed. The impeller 252 drives the generator 260 to operate through the transmission cooperation between the first pulley 256 and the second pulley 261 of the generator 260, realizing the conversion of heat energy into electrical energy. The generated electrical energy is distributed through the distribution cabinet 130 and can be stored in the battery pack 140 or directly used by the equipment. The flue gas that has completed the heat exchange is discharged through the output end of the first exhaust fan 230. Therefore, firstly, through preheating treatment and continuous water replenishment design, preheated water can be promptly replenished to the hot water tank 220, ensuring continuous water supply; secondly, the water vapor generated by the hot water tank 220 is efficiently used to drive the steam turbine 250 to drive the generator 260 to generate electricity, realizing the conversion of heat energy into electrical energy; thirdly, the design of the first exhaust fan 230 being immersed in water can effectively cool the fan, reduce the risk of deformation under high temperature environment, and improve the stability of equipment operation. Finally, the system realizes the recovery and reuse of flue gas waste heat, significantly reducing heat energy waste and improving resource utilization efficiency.

[0034] In addition, a waste heat recovery device for solid waste treatment rotary kiln according to an embodiment of this application also has the following additional technical features: According to this application, such as Figure 3 As shown, the preheating water supply tank 210 includes a water storage tank 211 and a preheating tank 212. The water storage tank 211 is fixedly connected to one side of the rotary kiln body 100, and the preheating tank 212 is fixedly connected to the inside of the smoke chamber 110. The water storage tank 211 is connected to the preheating tank 212, and the preheating tank 212 is connected to the hot water tank 220.

[0035] According to this application, such as Figure 3 As shown, a first water pipe 213 is provided between the water storage tank 211 and the preheating tank 212, and a first solenoid valve 214 is provided on the first water pipe 213. A second water pipe 215 is provided between the preheating tank 212 and the hot water tank 220, and a second solenoid valve 216 is provided on the second water pipe 215.

[0036] According to this application, such as Figure 5As shown, the first exhaust fan 230 includes a blower 231, a fan blade 232, a horizontal shaft 233, and a vertical shaft 234. The blower 231 is fixedly connected to the inside of the hot water tank 220. The horizontal shaft 233 is rotatably connected to the inside of the blower 231. The fan blade 232 is fixedly connected to the horizontal shaft 233. The vertical shaft 234 is rotatably connected to the blower 231. The bottom of the vertical shaft 234 is drivenly connected to the horizontal shaft 233. The upper part of the vertical shaft 234 is drivenly connected to the transmission end of the transmission component 240.

[0037] According to this application, such as Figure 3 As shown, the transmission component 240 includes a first motor 241, a gear set 242, and a transmission shaft 243. The first motor 241 is fixedly connected to one side of the rotary kiln body 100. The gear set 242 is rotatably connected to the rotary kiln body 100. One gear at the bottom of the gear set 242 is fixedly connected to the output end of the first motor 241. The gear at the top of the gear set 242 is fixedly connected to one end of the transmission shaft 243. The transmission shaft 243 is rotatably connected to the upper part of the hot water tank 220. The transmission shaft 243 is connected to the longitudinal shaft 234 for transmission.

[0038] According to this application, such as Figure 5 As shown, a first bevel gear 235 is provided in the middle of the horizontal shaft 233, a second bevel gear 236 is provided at the bottom of the vertical shaft 234, a third bevel gear 237 is provided at the upper part of the vertical shaft 234, and a fourth bevel gear 245 is provided on the transmission shaft 243. The first bevel gear 235 is meshed with the second bevel gear 236, and the third bevel gear 237 is meshed with the fourth bevel gear 245.

[0039] According to this application, such as Figure 6 As shown, the steam turbine 250 includes an outer casing 251 and an impeller 252. The impeller 252 is rotatably connected inside the outer casing 251. The outer casing 251 is fixedly connected to the rotary kiln body 100. The outer casing 251 is connected to the hot water tank 220. The impeller 252 is driven by the generator 260.

[0040] According to this application, such as Figure 6 As shown, a connecting pipe 253 is provided on one side of the outer casing 251, and a chimney 254 is provided on the other side of the outer casing 251. The connecting pipe 253 is fixedly connected to the upper part of the hot water tank 220.

[0041] According to this application, such as Figure 6 As shown, the impeller 252 is provided with a first pulley 256, and the generator 260 is provided with a second pulley 261. The first pulley 256 and the second pulley 261 are connected in a transmission connection.

[0042] According to this application, such as Figure 2As shown, a power distribution cabinet 130 is provided on one side of the rotary kiln body 100. The rotary kiln body 100 is also provided with a battery pack 140. The power distribution cabinet 130 is electrically connected to the generator 260, the battery pack 140, and the first motor 241.

[0043] The flue gas emitted from rotary kilns must be filtered and dust removed before it can be discharged into the environment or recycled. The conventional treatment process is as follows: first, large dust particles in the flue gas are separated by a cyclone separator, and then fine dust is deeply filtered by the air permeability of the filter bags to ensure that the dust removal effect meets the standards. However, there are obvious limitations in practical applications: the inner wall of the filter bags easily adsorbs a large amount of dust, which needs to be replaced in time to maintain filtration efficiency; and the conventional filter bags are designed to be relatively short, resulting in a limited dust holding capacity. This not only requires frequent replacement, but also requires machine shutdown during replacement, which consumes a certain amount of time and ultimately causes a decrease in overall filtration efficiency.

[0044] According to this application, such as Figures 7-10 As shown, it also includes a filter assembly 300, which includes a cyclone separator 310, a booster fan 320, a lifting frame 330, a ring barrel 340, a cloth cylinder 350, a gripper 360, a support plate 370, and a tensioning component 380. The bottom of the cyclone separator 310 is fixedly connected to the rotary kiln body 100. One side of the cyclone separator 310 is connected to the output end of the first exhaust fan 230. The air outlet end of the cyclone separator 310 is connected to the input end of the booster fan 320. The output end of the booster fan 320 is connected to the ring barrel 340. The ring barrel 340... The cloth cylinder 350 is fixedly connected to the lifting frame 330, and the bottom of the lifting frame 330 is fixedly connected to the rotary kiln body 100. One side of the cloth cylinder 350 is folded and sleeved on the outside of the ring barrel 340. The gripper 360 is fixedly connected to the lifting end of the lifting frame 330. The gripping end of the gripper 360 is clamped on the outside of the ring barrel 340. The gripping end of the gripper 360 clamps the cloth cylinder 350 on the outer side of one side of the ring barrel 340. The support plate 370 is fixedly connected to the rotary kiln body 100. One side of the cloth cylinder 350 is placed on the upper part of the support plate 370. The pulling end of the pulling member 380 is hung on one side of the cloth cylinder 350. Before starting the equipment, fold one end of the cloth tube 350 and place it around the outside of the raised ring 341 of the ring barrel 340. Drive the first frame 331 along the second frame 332 via the telescopic component 333 in the lifting frame 330, moving the gripper 360 to the outside of the ring barrel 340. The arc-shaped frame 361 of the gripper 360 opens and then closes, clamping and fixing the cloth tube 350 to the outer wall of the raised ring 341. Simultaneously, the other end of the cloth tube 350 is placed on the support plate 370 and connected and fixed to the hook 384 of the pulling component 380 via the hanging ring 351. During operation, the flue gas discharged from the first exhaust fan 230 first enters the cyclone separator 310. After centrifugal separation to remove large dust particles, it passes through the second... The three ventilation ducts 323 deliver the flue gas to the booster fan 320. After being boosted, the flue gas is sent through the first three ventilation ducts 321 into the symmetrically arranged ring barrels 340, and then from the ring barrels 340 into the cloth cylinder 350. When the flue gas passes through the cloth cylinder 350, it completes the deep filtration of fine dust. When too much dust accumulates on the inner wall of the cloth cylinder 350, causing the filtration efficiency to decrease, the arc frame 361 of the gripper 360 releases its clamp, the second motor 381 starts to drive the roller 382 to rotate, and pulls the cloth cylinder 350 through the pull rope 383, unfolding its folded spare part from the outside of the ring barrel 340 and stretching it to the working position. The filter surface of the cloth cylinder 350 can be renewed without stopping the machine, continuously ensuring the flue gas filtration effect.

[0045] According to this application, such as Figure 8 As shown, the lifting frame 330 includes a first frame 331, a second frame 332, and a telescopic member 333. The bottom of the second frame 332 and the bottom of the telescopic member 333 are both fixedly connected to the rotary kiln body 100. The first frame 331 and the second frame 332 are internally slidably connected. The output end of the telescopic member 333 is fixedly connected to the first frame 331. The gripper 360 is fixedly connected to the first frame 331.

[0046] According to this application, such as Figure 8 As shown, a raised ring 341 is provided on one side of the ring barrel 340, and an arc-shaped frame 361 is provided at the gripping end of the gripper 360. The cloth tube 350 is sleeved on the outside of the raised ring 341, and the arc-shaped frame 361 clamps and fits the cloth tube 350 against the outer surface of the raised ring 341.

[0047] According to this application, such as Figure 9 As shown, the pulling component 380 includes a second motor 381, a roller 382, ​​a pull rope 383, a hook 384, and a guide wheel 385. A hanging ring 351 is provided on one side of the cloth cylinder 350. The second motor 381 is fixedly connected to one side of the rotary kiln body 100. The output end of the second motor 381 is fixedly connected to the roller 382. The roller 382 is rotatably connected to the rotary kiln body 100. One end of the pull rope 383 is wound around the outside of the roller 382. The other end of the pull rope 383 is fixedly connected to the hook 384 via the guide wheel 385. The hook 384 is hung inside the hanging ring 351. The guide wheel 385 is rotatably connected to the rotary kiln body 100.

[0048] According to this application, such as Figure 1 and Figure 8 As shown, the lifting frame 330, the ring barrel 340, the cloth tube 350, the grab 360, the support plate 370 and the pulling component 380 are all symmetrically arranged. The output end of the booster fan 320 is provided with a first three ventilation pipe 321, and each of the two pipe ends of the first three ventilation pipe 321 is provided with a third solenoid valve 322.

[0049] According to this application, such as Figure 7 As shown, the booster fan 320 is equipped with a second and third ventilation pipe 323. One end of the second and third ventilation pipe 323 is connected to the cyclone separator 310, and the other end of the second and third ventilation pipe 323 is equipped with a flow control valve 324. It should be noted that the second and third ventilation pipe 323 and the flow control valve 324 may interfere with the cyclone separator 310 when the booster fan 320 directly draws in flue gas. Therefore, external air is introduced into the booster fan 320 through the second and third ventilation pipe 323 and the flow control valve 324 to ensure the stability of the cyclone separator 310 in separating large particles.

[0050] The discharge end of the rotary kiln, or kiln head, bears a dual key responsibility: on the one hand, it smoothly discharges qualified materials after high-temperature treatment; on the other hand, it is equipped with the combustion system, the core of the kiln's operation. To ensure complete combustion of fuel and improve overall combustion efficiency, oxygen-containing air needs to be continuously supplied to the combustion end of the combustion system to provide sufficient combustion-supporting conditions. However, the combustion-supporting efficiency of ambient temperature air is far less than that of preheated hot air. If ambient temperature air is used directly for combustion support, not only will the combustion reaction be incomplete due to the low temperature, but the combustion-supporting effect will also be weakened.

[0051] According to this application, such as Figure 11 and Figure 12 As shown, it also includes a combustion-supporting component 400, which includes a cover box 410, a second exhaust fan 420, a heat absorption box 430, a heat absorption pipe 440, and a nozzle 450. The output end of the first exhaust fan 230 is provided with an extension pipe 238, which penetrates the interior of the heat absorption box 430. The part of the extension pipe 238 located inside the heat absorption box 430 is provided with a heat dissipation structure. Multiple covers box 410s are provided. The covers box 410s are slidably connected to the support plate 370. One cover box 410 is connected to the input end of the second exhaust fan 420. The output end of the second exhaust fan 420 is connected to one side of the heat absorption pipe 440. The heat absorption pipe 440 is fixedly connected inside the heat absorption box 430. The other side of the heat absorption pipe 440 is connected to the nozzle 450. The nozzle 450 is fixedly connected to the coal injection pipe 120. After the filter assembly 300 completes the flue gas filtration, the flue gas filtered by the cloth cylinder 350 diffuses to the periphery of the cloth cylinder 350. At this time, the cover box 410, which is slidably connected to the support plate 370, slides along the outside of the cloth cylinder 350 and covers its exterior. Since the cover box 410 is a non-sealed structure, external oxygen-containing air can naturally enter the cover box 410 and mix with the flue gas to form a mixed airflow. During the sliding process of the cover box 410, when the connecting pipe 411 of one of the cover boxes 410 is inserted into the sleeve 422 of the third ventilation pipe 421 at the input end of the second exhaust fan 420, the two are connected. The second exhaust fan 420 is started to synchronously extract the mixed airflow, including flue gas and oxygen-containing air, inside the cover box 410. At this time, the extension pipe 238 of the output end of the first exhaust fan 230 penetrates the inside of the heat absorption box 430, and the heat dissipation structure of the part of the extension pipe 238 located inside the heat absorption box 430 will release the waste heat of the flue gas into the heat absorption box 430. The mixed airflow drawn by the second exhaust fan 420 is transported to the heat absorption pipe 440 fixed inside the heat absorption box 430. The mixed airflow exchanges heat with the waste heat in the heat absorption box 430 in the heat absorption pipe 440 to achieve heating. Finally, the heated hot air is transported through the heat absorption pipe 440 to the air nozzle 450 fixedly connected to the pulverized coal injection pipe 120. The air nozzle 450 sprays out at high speed to provide combustion assistance for the combustion operation of the pulverized coal injection pipe 120, realizing the dual functions of flue gas waste heat recovery and combustion efficiency enhancement.

[0052] According to this application, such as Figure 11 As shown, the enclosure 410 is symmetrically arranged, and the input end of the second exhaust fan 420 is provided with a third ventilation pipe 421. Each of the two pipe ends of the third ventilation pipe 421 is provided with a fourth solenoid valve.

[0053] According to this application, such as Figure 11 As shown, the third ventilation pipe 421 is provided with a sleeve 422, and the cover box 410 is provided with a connecting pipe 411, one end of which is inserted into the sleeve 422.

[0054] It should be noted that the telescopic component 333 can be any one of an electric push rod, an electric cylinder, a hydraulic cylinder, and a pneumatic cylinder.

[0055] Other components and operations of a solid waste treatment rotary kiln waste heat utilization device according to embodiments of this application are known to those skilled in the art and will not be described in detail here.

[0056] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can also be implemented in other ways. The apparatus embodiments described above are merely illustrative.

[0057] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A waste heat recovery device for a rotary kiln in solid waste treatment, comprising a rotary kiln body (100), wherein a smoke chamber (110) is provided on one side of the rotary kiln body (100), and a pulverized coal injection pipe (120) is provided on the other side of the rotary kiln body (100), characterized in that, Also includes: Waste heat power generation assembly (200) includes a preheating water supply tank (210), a hot water tank (220), a first exhaust fan (230), a transmission component (240), a steam turbine (250), and a generator (260). The preheating end of the preheating water supply tank (210) is fixedly connected inside the smoke chamber (110). Multiple first exhaust fans (230) are provided and fixedly connected inside the hot water tank (220). The preheating end of the preheating water supply tank (210) is connected to the hot water tank (220), and the input end of the first exhaust fan (230) is connected to the smoke chamber (110). The first exhaust fan (230) is connected to the outside of the hot water tank (220). The transmission end of the transmission component (240) is rotatably connected to the upper part of the hot water tank (220). The transmission end of the transmission component (240) is connected to the first exhaust fan (230). The steam turbine (250) and the generator (260) are symmetrically arranged. The steam turbine (250) and the generator (260) are fixedly connected to one side of the rotary kiln body (100). The steam turbine (250) is connected to the upper part of the hot water tank (220). The rotating end of the steam turbine (250) is connected to the generator (260).

2. The waste heat utilization device for a rotary kiln in solid waste treatment according to claim 1, characterized in that, The preheating water supply tank (210) includes a water storage tank (211) and a preheating tank (212). The water storage tank (211) is fixedly connected to one side of the rotary kiln body (100), and the preheating tank (212) is fixedly connected to the inside of the smoke chamber (110). The water storage tank (211) is connected to the preheating tank (212), and the preheating tank (212) is connected to the hot water tank (220).

3. The waste heat utilization device for a rotary kiln in solid waste treatment according to claim 2, characterized in that, A first water pipe (213) is provided between the water storage tank (211) and the preheating tank (212), and a first solenoid valve (214) is provided on the first water pipe (213). A second water pipe (215) is provided between the preheating tank (212) and the hot water tank (220), and a second solenoid valve (216) is provided on the second water pipe (215).

4. The waste heat utilization device for a rotary kiln in solid waste treatment according to claim 1, characterized in that, The first exhaust fan (230) includes a blower (231), a fan blade (232), a horizontal shaft (233), and a vertical shaft (234). The blower (231) is fixedly connected to the inside of the hot water tank (220). The horizontal shaft (233) is rotatably connected to the inside of the blower (231). The fan blade (232) is fixedly connected to the horizontal shaft (233). The vertical shaft (234) is rotatably connected to the blower (231). The bottom of the vertical shaft (234) is drivenly connected to the horizontal shaft (233). The upper part of the vertical shaft (234) is drivenly connected to the transmission end of the transmission component (240).

5. The waste heat utilization device for a rotary kiln in solid waste treatment according to claim 4, characterized in that, The transmission component (240) includes a first motor (241), a gear set (242), and a transmission shaft (243). The first motor (241) is fixedly connected to one side of the rotary kiln body (100). The gear set (242) is rotatably connected to the rotary kiln body (100). One gear at the bottom of the gear set (242) is fixedly connected to the output end of the first motor (241). The gear at the top of the gear set (242) is fixedly connected to one end of the transmission shaft (243). The transmission shaft (243) is rotatably connected to the upper part of the hot water tank (220). The transmission shaft (243) is tractively connected to the longitudinal shaft (234).

6. The waste heat utilization device for a rotary kiln in solid waste treatment according to claim 5, characterized in that, A first bevel gear (235) is provided in the middle of the horizontal shaft (233), a second bevel gear (236) is provided at the bottom of the vertical shaft (234), a third bevel gear (237) is provided at the upper part of the vertical shaft (234), and a fourth bevel gear (245) is provided on the transmission shaft (243). The first bevel gear (235) is meshed with the second bevel gear (236), and the third bevel gear (237) is meshed with the fourth bevel gear (245).

7. The waste heat utilization device for a rotary kiln in solid waste treatment according to claim 1, characterized in that, The steam turbine (250) includes an outer casing (251) and an impeller (252). The impeller (252) is rotatably connected inside the outer casing (251). The outer casing (251) is fixedly connected to the rotary kiln body (100). The outer casing (251) is connected to the hot water tank (220). The impeller (252) is driven by the generator (260).

8. A waste heat recovery device for a rotary kiln in solid waste treatment according to claim 7, characterized in that, A connecting pipe (253) is provided on one side of the outer casing (251), and a chimney (254) is provided on the other side of the outer casing (251). The connecting pipe (253) is fixedly connected to the upper part of the hot water tank (220).

9. A waste heat recovery device for a rotary kiln in solid waste treatment according to claim 7, characterized in that, The impeller (252) is provided with a first pulley (256), and the generator (260) is provided with a second pulley (261). The first pulley (256) and the second pulley (261) are connected in a transmission connection.

10. A waste heat recovery device for a rotary kiln in solid waste treatment according to claim 5, characterized in that, A power distribution cabinet (130) is provided on one side of the rotary kiln body (100). The rotary kiln body (100) is also provided with a battery pack (140). The power distribution cabinet (130) is electrically connected to the generator (260), the power distribution cabinet (130) is electrically connected to the battery pack (140), and the power distribution cabinet (130) is electrically connected to the first motor (241).

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