Flue gas recycling system of circular cooler and water tank mounting method of flue gas recycling system

Abstract

The invention relates to the technical field of circular cooler flue gas recycling, and particularly provides a circular cooler flue gas recycling system and a water tank mounting method thereof. The flue gas recycling system of the circular cooler comprises a circular cooler water tank, a flue assembly, a dust removal assembly, a hot air fluidization assembly and a sorting and conveying assembly. High-temperature tail gas can be fully utilized, heat energy recovery is achieved, fuel is impacted, sheared and smashed, full contact and rapid drying of the fuel and the high-temperature tail gas are promoted, fluidized fuel is formed, the combustion efficiency is improved, the mixing effect of the fuel and gas can be guaranteed, the stability and completeness of the combustion process are facilitated, and the combustion efficiency is improved. And intelligent control is achieved, sorting operation is carried out according to different tail gas conditions, it is ensured that recycled heat can be utilized in the current most economical and most effective mode, and therefore the overall energy efficiency of the sintering system is maximized, the resource recycling rate is effectively increased, and emission and energy consumption are reduced.

Description

Technical Field

[0001] This invention relates to the field of flue gas reuse technology for annular coolers, and in particular provides a flue gas reuse system for annular coolers and a method for installing its water tank. Background Technology

[0002] The function of the annular cooler is to effectively cool the hot sintered ore discharged from the sintering machine. The annular cooler is circular in shape. As the hot sintered ore passes through the annular cooler via a trolley, cold air is blown upwards by a fan below. The cold air passes through the grate and enters the trolley, where it undergoes sufficient heat exchange with the hot sintered ore before being discharged as hot flue gas from the exhaust duct. From the inlet to the outlet, the annular cooler is divided into four sections based on the calorific value of the generated flue gas: receiving section, high-temperature section, medium-temperature section, and low-temperature section. The flue gas produced in these sections is respectively receiving flue gas, high-temperature flue gas, medium-temperature flue gas, and low-temperature flue gas.

[0003] While existing technologies employ dust removal and exhaust gas recovery measures, they still suffer from numerous shortcomings in fuel treatment and exhaust gas reuse. First, the exhaust gas temperature monitoring and regulation mechanism is inadequate, failing to intelligently adjust the exhaust gas return path based on temperature changes. Instead, the treated exhaust gas is simply redirected back to the ignition furnace of the sintering machine or the upper part of the entire sintering bed for auxiliary sintering, or exhaust gases at different temperature ranges (high, medium, and low temperatures) are introduced into a waste heat boiler to heat water and generate steam to drive a turbine generator for power generation. This results in insufficient resource utilization. Furthermore, existing sintering machines contain numerous large particles and incompletely dried fuel particles in their fuel, making complete combustion difficult, reducing combustion efficiency, increasing fuel consumption, and exacerbating the emission of harmful substances, thus impacting environmental quality. Summary of the Invention

[0004] Therefore, it is necessary to provide a flue gas reuse system for an annular cooler and a water tank installation method thereof to solve at least one of the technical problems in the background art.

[0005] A flue gas reuse system for an annular cooler includes an annular cooler water tank, a flue assembly, a dust removal assembly, a hot air fluidization assembly, and a sorting and conveying assembly. The annular cooler water tank includes an upper water tank and a lower water tank. The top of the upper water tank is installed below the rotating frame of the annular cooler, and multiple air inlets are recessed in the upper water tank. The top of the lower water tank is installed at the bottom of the upper water tank. A receiving fan, a high-temperature fan, and a medium-temperature fan are installed inside the upper water tank. The receiving fan is installed in the receiving section of the annular cooler. This system is used to supply cooling air to the receiving section of the annular cooler. A high-temperature fan is installed in the high-temperature section of the annular cooler, and a medium-temperature fan is installed in the medium-temperature section. The flue assembly includes a receiving flue, a medium-temperature section flue, a high-temperature section flue, a sintering boiler flue, and a reuse flue. The inlet end of the receiving flue connects to the exhaust section of the receiving section of the annular cooler; the inlet end of the medium-temperature section flue connects to the exhaust section of the medium-temperature section of the annular cooler; and the inlet end of the high-temperature section flue connects to the exhaust section of the high-temperature section of the annular cooler. The exhaust end is connected to the dust removal assembly, which includes a dust collector and a high-temperature induced draft flue. The dust collector has a medium-temperature air inlet protruding from its outer side, which is connected to the exhaust end of the medium-temperature section flue. The dust collector is installed on the outer end of the installation ground, and its outer end is connected to the inner end of the high-temperature induced draft flue. The outer end of the high-temperature induced draft flue is connected to the exhaust section of the high-temperature section flue and the exhaust section of the receiving flue. The hot air fluidization assembly is installed on the inner end of the installation ground, and its middle part is connected to the inner end of the dust collector. The sorting and conveying assembly is installed on top of the hot air fluidization assembly. A three-way connector is provided on the top of the hot air fluidization assembly, and an electrically controlled diverter valve is provided inside the three-way connector. The air inlet of the sintering boiler flue is connected to the heating and return end of the three-way connector. The exhaust end of the sintering boiler flue is connected to the sintering boiler return port. The air inlet of the reuse flue is connected to the cold sintering return end of the three-way connector. The exhaust end of the reuse flue is connected to the air outlet of the medium-temperature section of the annular cooler.

[0006] As a further improvement of the present invention, the hot air fluidization assembly includes a fluidization mounting frame, a bottom barrel element, an air intake rotating element, and an exhaust barrel element. The bottom of the fluidization mounting frame is installed on the inner end of the mounting ground. The bottom barrel element includes a cyclone bottom barrel and an inverted conical collecting cylinder. The bottom of the cyclone bottom barrel is installed on the top of the fluidization mounting frame. The cyclone bottom barrel is connected to the inner end of the dust collector. The cyclone bottom barrel is hollow inside to form a cyclone cavity. The outer edge of the cyclone bottom barrel is hollow to form an annular heat insulation cavity. The top outer wall of the inverted conical collecting cylinder is installed on the bottom wall of the cyclone bottom barrel. The bottom surface of the inverted conical collecting cylinder is installed on the bottom surface of the cyclone cavity. Discharge holes are recessed at both ends of the bottom surface of the cyclone cavity. Discharge pipes are protruding from the discharge holes. A rotating mounting hole is recessed in the middle of the bottom surface of the cyclone cavity. An air outlet mounting hole is recessed in the middle of the top surface of the cyclone cavity. The air intake rotating element is installed in the rotating mounting hole and the bottom surface of the cyclone cavity. The exhaust barrel element is installed in the air outlet mounting hole.

[0007] As a further improvement of the present invention, the air-expelling rotary element includes a rotary drive motor, a rotary drive shaft, a heat-insulating conical cylinder, multiple air-expelling blades, multiple crushing hammers, and a material-expelling conical mesh. The rotary drive motor is installed in a rotary mounting hole, the bottom of the rotary drive shaft is installed in the output shaft of the rotary drive motor, the bottom of the heat-insulating conical cylinder is installed on the bottom surface of the cyclone cavity, and the heat-insulating conical cylinder is located between the rotary mounting hole and the discharge hole. The top of the heat-insulating conical cylinder is rotatably connected to the bottom of the outer wall of the rotary drive shaft. The inner ends of the multiple air-expelling blades are respectively installed at intervals along the height direction on the top of the rotary drive shaft. The multiple crushing hammers are installed on the outer ends of the multiple air-expelling blades, and the middle part of the material-expelling conical mesh is installed in the middle of the rotary drive shaft.

[0008] As a further improvement of the present invention, the exhaust cylinder element includes an exhaust vertical cylinder and a return material inverted cone cylinder. The middle part of the outer wall of the exhaust vertical cylinder is installed in the air outlet mounting hole, and an acceleration gap is formed between the bottom surface of the exhaust vertical cylinder and the bottom surface of the cyclone cavity. The bottom of the outer wall of the exhaust vertical cylinder is provided with a spiral blade. The middle part of the outer wall of the exhaust vertical cylinder is recessed with a feeding groove. The top of the outer wall of the exhaust vertical cylinder is recessed with a smoke outlet hole. The air inlet end of the three-way connector is connected to the smoke outlet hole. The bottom of the outer wall of the return material inverted cone cylinder is provided with a mounting connecting ring. The outer wall of the mounting connecting ring is connected to the middle part of the inner wall of the exhaust vertical cylinder.

[0009] As a further improvement of the present invention, the top surface of the mounting connecting ring is provided with a return material drop groove at intervals along the circumferential direction, and the two ends of the outer wall of the return material inverted cone are respectively provided with a vertical return material groove.

[0010] As a further improvement of the present invention, the sorting and conveying assembly includes a sorting input shaft, a sorting spiral mesh, an inverted cone sorting cylinder, and a top sorting element. The bottom of the sorting input shaft is mounted on the top of the rotary drive shaft. The inner wall of the sorting spiral mesh is mounted on the middle of the outer wall of the sorting input shaft, and the outer wall of the sorting spiral mesh slides against the inner wall of the return inverted cone cylinder. The bottom surface of the inverted cone sorting cylinder is mounted on the top surface of the return inverted cone cylinder, and the top sorting element is mounted on the top of the sorting input shaft.

[0011] As a further improvement of the present invention, the inner wall of the inverted cone sorting cylinder is recessed at intervals along the circumferential direction in the middle part, and the top of the inverted cone sorting cylinder is recessed in the wind-gathering acceleration hole.

[0012] As a further improvement of the present invention, the top sorting element includes an acceleration fan, a primary sorting inverted cone, and a secondary sorting cone. The acceleration fan is installed on the top of the sorting input shaft, the inner wall of the primary sorting inverted cone is installed on the outer wall of the acceleration fan, and the outer wall of the primary sorting inverted cone slides against the middle of the inner wall of the inverted cone sorting cylinder. The bottom of the secondary sorting cone is installed on the outer edge of the top surface of the acceleration fan, and a re-feeding gap is formed between the outer wall of the secondary sorting cone and the top of the inner wall of the inverted cone sorting cylinder.

[0013] As a further improvement of the present invention, the top surface of the sorting spiral mesh is provided with a plurality of first sorting holes at intervals along the circumferential direction, and the diameter of the plurality of first sorting holes gradually decreases from bottom to top. The top surface of the initial sorting inverted cone is provided with a plurality of second sorting holes at intervals along the circumferential direction, and the top surface of the secondary sorting cone is provided with a plurality of third sorting holes at intervals along the circumferential direction.

[0014] A method for installing a water tank in an annular cooler is provided, applicable to the aforementioned flue gas reuse system of an annular cooler. The installation method includes: Step S1: Hoist the drain tank to the installation position and install 3-5 sets of funnel-shaped water tanks in the inlet area of ​​the drain tank; Step S2: Place the sink insert plate into the designed position of the sink, and apply high-temperature sealant to the mating surface between the sink insert plate and the sink. Step S3: Install the upper water tank under the rotating frame and connect the lower water tank to the lower water tank.

[0015] The beneficial effects of this invention are as follows: 1. This project enables full utilization of high-temperature exhaust gas, achieving heat energy recovery. The fuel is subjected to violent impact, shearing, and pulverization, promoting thorough contact and rapid drying between the fuel and the high-temperature exhaust gas, forming a suspended fluidized fuel that improves combustion efficiency. It also ensures effective mixing of fuel and gas, facilitating stable and complete combustion. Furthermore, intelligent control allows for sorting operations based on different exhaust gas conditions, ensuring that the recovered heat is utilized in the most economical and efficient manner. This maximizes the overall energy efficiency of the sintering system, effectively improving resource recycling rates and reducing emissions and energy consumption.

[0016] 2. This invention enables the sorting of particle size in fluidized fuel, ensuring the uniformity of fuel particle size, preventing large fuel particles from directly entering the subsequent combustion process and preventing wet fuel particles from entering the combustion system, which would lead to incomplete combustion or increased emissions, thereby improving the fineness of the fuel and combustion efficiency.

[0017] 3. The installation of the annular cooler water tank in this case is convenient and quick. The installation of the water tank insert plate adopts a sealant structure, reducing the amount of welding and improving construction efficiency. Moreover, when replacing it next time, only the old sealant needs to be removed for reinstallation, avoiding heavy work such as cutting and grinding, making subsequent maintenance extremely simple. In addition, an expansion joint is added to the upper water tank to effectively absorb the thermal expansion and contraction of the metal structure caused by temperature changes during the start-up, shutdown and operation of the annular cooler, preventing deformation, cracking or weld tearing of the annular cooler water tank structure due to the accumulation of thermal stress. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of an embodiment of the present invention.

[0019] Figure 2This is a schematic diagram of the internal structure of a frame assembly in one embodiment of the present invention.

[0020] Figure 3 This is an internal fracture view of the hot air fluidization assembly and the sorting and conveying assembly in one embodiment of the present invention.

[0021] Figure 4 This is an internal schematic diagram of the hot air fluidization component and the sorting and conveying component in one embodiment of the present invention.

[0022] Figure 5 for Figure 2 A magnified view of a portion of point A in the middle.

[0023] Figure 6 This is a schematic diagram of the internal structure of the sorting and conveying assembly and the return cone in one embodiment of the present invention.

[0024] Figure 7 This is a schematic diagram of the interior of the inverted cone sorting cylinder and the top sorting element in one embodiment of the present invention.

[0025] In the picture: 20. Dust removal assembly; 21. Dust collector; 22. High-temperature induced draft flue; 23. Medium-temperature air inlet; 30. Hot air fluidization assembly; 31. Fluidization mounting bracket; 32. Bottom tank element; 321. Cyclone bottom tank; 322. Inverted conical material collection cylinder; 323. Cyclone cavity; 324. Annular heat insulation cavity; 325. Discharge hole; 326. Discharge pipe; 327. Rotary mounting hole; 328. Air outlet mounting hole; 33. Induced air rotation element; 331. Rotary drive motor; 330. Rotary drive shaft; 332. Heat-insulated conical cylinder; 333. Induced draft blades; 334. Crusher hammer; 335. Induced material conical mesh; 34. Exhaust tank element; 341. Vertical exhaust fan. 342. Return material inverted cone cylinder; 343. Acceleration gap; 344. Spiral blade; 345. Feed filling trough; 346. Smoke outlet; 347. Mounting connecting ring; 348. Return material drop trough; 349. Vertical return material trough; 40. Sorting conveyor assembly; 41. Sorting input shaft; 42. Sorting spiral mesh; 421. First sorting hole; 43. Inverted cone sorting cylinder; 431. Re-sorting return material trough; 432. Air-gathering acceleration hole; 44. Top sorting element; 441. Acceleration fan; 442. Initial sorting inverted cone cylinder; 443. Re-sorting cone cylinder; 444. Second sorting hole; 445. Third sorting hole; 440. Re-return material gap; 50. Sensor integration. Detailed Implementation

[0026] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0027] In the description of this invention, it should be noted that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] Please see Figures 1 to 7 The annular cooler flue gas reuse system includes an annular cooler water tank, a flue assembly, a dust removal assembly 20, a hot air fluidization assembly 30, and a sorting and conveying assembly 40. The annular cooler water tank includes an upper water tank and a lower water tank. The top of the upper water tank is installed below the rotating frame of the annular cooler, and multiple air inlets are recessed in the upper water tank. The top of the lower water tank is installed at the bottom of the upper water tank. The upper water tank is equipped with a receiving fan, a high-temperature fan, and a medium-temperature fan. The receiving fan is installed in the receiving section of the annular cooler and uses... Cooling air is supplied to the receiving section of the annular cooler. A high-temperature fan is installed in the high-temperature section of the annular cooler, and a medium-temperature fan is installed in the medium-temperature section of the annular cooler. The flue assembly includes a receiving flue, a medium-temperature section flue, a high-temperature section flue, a sintering boiler flue, and a reuse flue. The air inlet of the receiving flue is connected to the exhaust section of the receiving section of the annular cooler, the air inlet of the medium-temperature section flue is connected to the exhaust section of the medium-temperature section of the annular cooler, and the air inlet of the high-temperature section flue is connected to the exhaust end of the high-temperature section of the annular cooler.

[0030] The dust collection assembly 20 includes a dust collector 21 and a high-temperature induced draft flue 22. A medium-temperature air inlet 23 protrudes from the outer side of the dust collector 21 and connects to the exhaust end of the medium-temperature section flue. The dust collector 21 is installed on the outer end of the mounting surface, and its outer end connects to the inner end of the high-temperature induced draft flue 22. The outer end of the high-temperature induced draft flue 22 connects to the exhaust section of the high-temperature section flue and the exhaust section of the receiving flue. The hot air fluidization assembly 30 is installed on the inner end of the mounting surface. The middle part is connected to the inner end of the dust collector 21. The sorting and conveying assembly 40 is installed on the top of the hot air fluidization assembly 30. A three-way connector is provided on the top of the hot air fluidization assembly 30. An electrically controlled diverter valve is provided inside the three-way connector. The air inlet end of the sintering boiler flue is connected to the heating and return end of the three-way connector. The exhaust end of the sintering boiler flue is connected to the sintering boiler return port. The air inlet end of the reuse flue is connected to the cold sintering return end of the three-way connector. The exhaust end of the reuse flue is connected to the air outlet of the intermediate temperature section of the annular cooler.

[0031] The hot air fluidization assembly 30 includes a fluidization mounting frame 31, a bottom tank element 32, an air intake rotating element 33, and an exhaust tank element 34. The bottom of the fluidization mounting frame 31 is installed on the inner end of the mounting surface. The bottom tank element 32 includes a cyclone bottom tank 321 and an inverted conical collecting cylinder 322. The bottom of the cyclone bottom tank 321 is installed on the top of the fluidization mounting frame 31. The cyclone bottom tank 321 is connected to the inner end of the dust collector 21. The interior of the cyclone bottom tank 321 is hollow, forming a cyclone cavity 323. The outer edge of the cyclone bottom tank 321 is hollow, forming an annular heat insulation cavity 324. The inverted conical collecting cylinder 324... The top outer wall of 22 is installed on the bottom of the inner wall of the cyclone bottom barrel 321. The bottom surface of the inverted conical collecting cylinder 322 is installed on the bottom surface of the cyclone cavity 323. The bottom surfaces of the cyclone cavity 323 are respectively provided with discharge holes 325 at both ends. The discharge holes 325 are provided with discharge pipes 326. The bottom surface of the cyclone cavity 323 is provided with a rotary mounting hole 327 in the middle. The top surface of the cyclone cavity 323 is provided with an air outlet mounting hole 328 in the middle. The air intake rotating element 33 is installed in the rotary mounting hole 327 and the bottom surface of the cyclone cavity 323. The exhaust bucket element 34 is installed in the air outlet mounting hole 328.

[0032] The air-expelling rotary element 33 includes a rotary drive motor 331, a rotary drive shaft 330, a heat-insulating conical cylinder 332, multiple air-expelling blades 333, multiple crushing hammers 334, and a material-expelling conical mesh 335. The rotary drive motor 331 is installed in the rotary mounting hole 327. The bottom of the rotary drive shaft 330 is installed in the output shaft of the rotary drive motor 331. The bottom of the heat-insulating conical cylinder 332 is installed on the bottom surface of the cyclone cavity 323, and the heat-insulating conical cylinder 332 is located between the rotary mounting hole 327 and the discharge hole 325. The top of the heat-insulating conical cylinder 332 is rotatably connected to the bottom of the outer wall of the rotary drive shaft 330. The inner ends of the multiple air-expelling blades 333 are respectively installed at intervals along the height direction on the top of the rotary drive shaft 330. The multiple crushing hammers 334 are installed on the outer ends of the multiple air-expelling blades 333. The middle part of the material-expelling conical mesh 335 is installed in the middle of the rotary drive shaft 330.

[0033] The exhaust cylinder element 34 includes an exhaust vertical cylinder 341 and a return material inverted cone cylinder 342. The middle part of the outer wall of the exhaust vertical cylinder 341 is installed in the air outlet mounting hole 328, and an acceleration gap 343 is formed between the bottom surface of the exhaust vertical cylinder 341 and the bottom surface of the cyclone cavity 323. The bottom of the outer wall of the exhaust vertical cylinder 341 is provided with a spiral blade 344. The middle part of the outer wall of the exhaust vertical cylinder 341 is recessed with a feed filling groove 345. The top of the outer wall of the exhaust vertical cylinder 341 is recessed with a smoke outlet hole 346. The air inlet end of the three-way connector is connected to the smoke outlet hole 346. The bottom of the outer wall of the return material inverted cone cylinder 342 is provided with a mounting connecting ring 347. The outer wall of the mounting connecting ring 347 is connected to the middle part of the inner wall of the exhaust vertical cylinder 341.

[0034] The top surface of the mounting connecting ring 347 is recessed with a return material drop groove 348 at intervals along the circumference, and the two ends of the outer wall of the return material inverted cone 342 are respectively recessed with vertical return material grooves 349.

[0035] The sorting and conveying assembly 40 includes a sorting input shaft 41, a sorting spiral mesh 42, an inverted cone sorting cylinder 43, and a top sorting element 44. The bottom of the sorting input shaft 41 is mounted on the top of the rotary drive shaft 330. The inner wall of the sorting spiral mesh 42 is mounted on the middle of the outer wall of the sorting input shaft 41, and the outer wall of the sorting spiral mesh 42 slides against the inner wall of the return inverted cone cylinder 342. The bottom surface of the inverted cone sorting cylinder 43 is mounted on the top surface of the return inverted cone cylinder 342, and the top sorting element 44 is mounted on the top of the sorting input shaft 41.

[0036] The inner wall of the inverted cone sorting cylinder 43 is recessed at intervals along the circumferential direction with a re-sorting return trough 431, and the top of the inverted cone sorting cylinder 43 is recessed with an air-gathering acceleration hole 432.

[0037] The top sorting element 44 includes an acceleration fan 441, a primary sorting inverted cone 442, and a secondary sorting cone 443. The acceleration fan 441 is installed on the top of the sorting input shaft 41. The inner wall of the primary sorting inverted cone 442 is installed on the outer wall of the acceleration fan 441, and the outer wall of the primary sorting inverted cone 442 slides against the middle of the inner wall of the inverted cone sorting cylinder 43. The bottom of the secondary sorting cone 443 is installed on the outer edge of the top surface of the acceleration fan 441, and a re-feeding gap 440 is formed between the outer wall of the secondary sorting cone 443 and the top of the inner wall of the inverted cone sorting cylinder 43.

[0038] The top surface of the sorting spiral mesh 42 is provided with a plurality of first sorting holes 421 recessed at intervals along the circumferential direction, and the diameter of the plurality of first sorting holes 421 gradually decreases from bottom to top. The top surface of the initial sorting inverted cone 442 is provided with a plurality of second sorting holes 444 recessed at intervals along the circumferential direction, and the top surface of the secondary sorting cone 443 is provided with a plurality of third sorting holes 445 recessed at intervals along the circumferential direction.

[0039] The present invention also provides a method for installing a water tank in an annular cooler, the method being applied to the aforementioned flue gas reuse system of an annular cooler, comprising the following steps: Step S1: Hoist the drain tank to the installation position and install 3-5 sets of funnel-shaped water tanks in the inlet area of ​​the drain tank; Step S2: Place the sink insert plate into the designed position of the sink, and apply high-temperature sealant to the mating surface between the sink insert plate and the sink. Step S3: Install the upper water tank under the rotating frame and connect the lower water tank to the lower water tank.

[0040] For example, in one embodiment: a sedimentation tank is added to the lower water tank, and a cleaner is installed to remove sludge, achieving automated and routine sludge removal. Simultaneously, the installation of the water tank insert plate uses a sealant structure, reducing welding and improving construction efficiency. Furthermore, for subsequent replacements, only the old sealant needs to be removed for reinstallation, avoiding heavy-duty operations such as cutting and grinding, making subsequent maintenance exceptionally simple. A water filling device is installed on the funnel-shaped water tank to enhance the water flow impact force, ensuring delivery efficiency, and even enabling high-pressure flushing when necessary to prevent pipe blockage. The inner walls of the lower and upper water tanks are mechanically sealed, and an expansion joint is added to the upper water tank to effectively absorb the thermal expansion and contraction of the metal structure caused by temperature changes during start-up, shutdown, and operation of the annular cooler, preventing deformation, cracking, or weld tearing of the annular cooler water tank structure due to accumulated thermal stress.

[0041] For example, in one embodiment: sensor integration 50 is installed both inside and at the inner end of dust collector 21, and both sensor integration 50 are electrically connected to the electrically controlled diverter valve; the sensor integration 50 inside dust collector 21 consists of a temperature sensor, a pressure sensor, and a gas composition analyzer, used to detect the temperature of the input exhaust gas and whether the dust collector 21 is blocked during dust removal; the sensor integration 50 at the inner end of dust collector 21 consists of a temperature sensor and a flow meter. The outer end of the feed filling tank 345 is connected to the fuel filling equipment of the sintering boiler through a pipe, and both discharge pipes 326 are equipped with electrically controlled valves, which are connected to the two sensor integration 50s. The bottoms of the two discharge pipes 326 are respectively connected to the return end of the fuel filling equipment of the sintering boiler through pipes. A re-filtration device is installed in the reuse flue.

[0042] For example, in one embodiment: when the exhaust gas from the receiving flue, the high-temperature flue, and the medium-temperature flue is sent into the dust collector 21, the dust collector 21 will perform dust reduction filtration to form clean exhaust gas. At the same time, the two integrated sensors 50 on the dust collector 21 will monitor the temperature and flow rate of the output clean exhaust gas in real time.

[0043] When the clean exhaust gas at a higher temperature passes through the cyclone bottom barrel 321, it is guided by the cyclone bottom barrel 321 and the spiral blades 344 to enter the acceleration gap 343 at the bottom of the cavity at a higher speed. At the same time, the fuel injection equipment of the sintering boiler will be started, and fuel will be evenly injected into the bottom of the cyclone bottom barrel 321. Simultaneously, the rotary drive motor 331 will be started, thereby driving multiple induced draft blades 333, multiple crushing hammers 334, feeding cone mesh 335 and sorting input shaft 41 to rotate, thereby violently impacting, shearing and crushing the falling fuel, breaking it into fine fuel particles, which makes the surface area of ​​the material per unit weight increase sharply.

[0044] Subsequently, the fuel particles mix with the high-speed, high-temperature clean exhaust gas. The moisture inside the material rapidly vaporizes and diffuses into the surrounding airflow after gaining heat, causing it to dry quickly and become suspended. Then, under the high-speed flow of the clean exhaust gas, the rotation of multiple induced draft blades 333, and the guidance of the heat-insulating cone 332, it moves towards the top of the internal cavity of the exhaust vertical cylinder 341, forming a boiling fluidized state. Under the rotational guidance of the induced draft cone 335 and the sorting spiral mesh 42, it spirals upward within the internal cavity of the exhaust vertical cylinder 341, which relatively prolongs the contact time and contact area between the gas and solid phases, allowing them to mix thoroughly and form fluidized fuel. Subsequently, when the fluidized fuel passes through the inverted cone sorting cylinder 43, it will undergo convergence and acceleration.

[0045] Meanwhile, the top sorting element 44 located at the top will be driven by the rotation of the sorting input shaft 41 to re-accelerate the fluidized fuel, so that it is quickly transported to the three-way connector through the air-gathering acceleration hole 432 and the flue gas outlet 346. Since both sensor integrations 50 are electrically connected to the electronically controlled diverter valve, the electronically controlled diverter valve will close the cold sintering return gas end of the three-way connector and open the heating return end, thereby sending the fluidized fuel through the heating return end of the three-way connector and the sintering boiler flue into the return end of the sintering boiler, realizing resource reuse. Moreover, the higher temperature, dryness and suspension state of the fluidized fuel can make subsequent combustion more complete.

[0046] When the clean exhaust gas temperature is detected to be low, the sintering boiler's fuel injection equipment will be shut down. At the same time, the electrically controlled valves installed on the two discharge pipes 326 will open, quickly discharging any fuel that may be present in the cyclone bottom bucket 321 and returning it to the sintering boiler's fuel injection equipment. Subsequently, the electrically controlled valves will be closed, and the electrically controlled diverter valve will close the heating return end and open the cold sintering return gas end. When the low-temperature clean exhaust gas enters, the rotary drive motor 331 will be started, driving the rotary drive shaft 330 and the sorting input shaft 41 to rotate, thereby guiding and accelerating the low-temperature clean exhaust gas and sending it into the reuse flue. Subsequently, it enters the medium-temperature section of the annular cooler for reuse.

[0047] For example, in one embodiment: when the fluidized fuel moves upward from the bottom of the exhaust vertical cylinder 341, the rotating sorting spiral mesh 42 guides the fluidized fuel to move in a spiral upward motion. Simultaneously, because the top surface of the sorting spiral mesh 42 is recessed with multiple first sorting holes 421 at intervals along the circumferential direction, and the diameter of the multiple first sorting holes 421 gradually decreases from bottom to top, large particles in the fluidized fuel, or fuel splashed upward due to the rotation of multiple induced draft blades 333 and multiple crushing hammers 334, are sorted. Large particles of fluidized fuel will fall back to the bottom of the exhaust vertical cylinder 341 through the vertical return trough 349 and the return material drop trough 348 due to the centrifugal force of the rotating sorting spiral mesh 42, and be re-crushed. At the same time, the rotating primary sorting inverted cone 442 and the re-sorting cone 443 will also re-sort the fluidized fuel and let it fall back to the bottom of the exhaust vertical cylinder 341 along multiple re-sorting return troughs 431 and the return material drop trough 348, ensuring the uniformity of particle size and dryness of the output fluidized fuel, and preventing large particles that are not fully dried from being carried away.

[0048] Installation process: Connect the inlet end of the receiving flue to the exhaust section of the receiving section of the annular cooler; connect the inlet end of the medium-temperature flue to the exhaust section of the medium-temperature section of the annular cooler; connect the inlet end of the high-temperature flue to one end of the high-temperature section of the annular cooler; connect the medium-temperature inlet 23 to the exhaust end of the medium-temperature flue; connect the outer end of the dust collector 21 to the inner end of the high-temperature induced draft flue 22; connect the outer end of the high-temperature induced draft flue 22 to the exhaust section of the high-temperature flue and the exhaust section of the receiving flue; install the bottom of the fluidizing mounting frame 31 on the inner end of the installation ground; connect the cyclone bottom barrel 321 to the inner end of the dust collector 21; install the top outer wall of the inverted conical collecting cylinder 322 on the bottom inner wall of the cyclone bottom barrel 321; install the bottom surface of the inverted conical collecting cylinder 322 on the bottom surface of the cyclone cavity 323; and install the rotary drive motor 331 in the rotary mounting hole 327.

[0049] The bottom of the rotary drive shaft 330 is mounted in the output shaft of the rotary drive motor 331. The bottom of the heat-insulating conical cylinder 332 is mounted on the bottom surface of the cyclone cavity 323, and the heat-insulating conical cylinder 332 is located between the rotary mounting hole 327 and the discharge hole 325. The top of the heat-insulating conical cylinder 332 is rotatably connected to the bottom of the outer wall of the rotary drive shaft 330. The inner ends of multiple air-guiding blades 333 are respectively installed at intervals along the height direction on the top of the rotary drive shaft 330. Multiple crushing hammers 334 are installed on the outer ends of multiple air-guiding blades 333. The feeding conical mesh... The middle part of the 335 is installed in the middle of the rotary drive shaft 330. The middle part of the outer wall of the exhaust vertical cylinder 341 is installed in the exhaust mounting hole 328, and an acceleration gap 343 is formed between the bottom surface of the exhaust vertical cylinder 341 and the bottom surface of the cyclone cavity 323. The outer wall of the mounting ring 347 is connected to the middle part of the inner wall of the exhaust vertical cylinder 341. The air inlet end of the three-way connector is connected to the smoke outlet 346. The air inlet end of the sintering boiler flue is connected to the heating reflux end of the three-way connector. The exhaust end of the sintering boiler flue is connected to the sintering boiler return port.

[0050] The inlet end of the reuse flue is connected to the cold-sealed return end of the three-way connector, and the exhaust end of the reuse flue is connected to the outlet of the medium-temperature section of the annular cooler. The bottom of the sorting input shaft 41 is installed on the top of the rotary drive shaft 330. The inner wall of the sorting spiral mesh 42 is installed on the middle of the outer wall of the sorting input shaft 41, and the outer wall of the sorting spiral mesh 42 slides against the inner wall of the return material inverted cone 342. The acceleration fan 441 is installed on the top of the sorting input shaft 41. The inner wall of the primary selection inverted cone 442 is installed on the outer wall of the acceleration fan 441, and the outer wall of the primary selection inverted cone 442 slides against the middle of the inner wall of the inverted cone sorting cylinder 43. The bottom of the secondary selection cone 443 is installed on the outer edge of the top surface of the acceleration fan 441. A re-return material gap 440 is formed between the outer wall of the secondary selection cone 443 and the top of the inner wall of the inverted cone sorting cylinder 43.

[0051] This invention can achieve: 1. This project enables full utilization of high-temperature exhaust gas, achieving heat energy recovery. The fuel is subjected to violent impact, shearing, and pulverization, promoting thorough contact and rapid drying between the fuel and the high-temperature exhaust gas, forming a suspended fluidized fuel that improves combustion efficiency. It also ensures effective mixing of fuel and gas, facilitating stable and complete combustion. Furthermore, intelligent control allows for sorting operations based on different exhaust gas conditions, ensuring that the recovered heat is utilized in the most economical and efficient manner. This maximizes the overall energy efficiency of the sintering system, effectively improving resource recycling rates and reducing emissions and energy consumption.

[0052] 2. This invention enables the sorting of particle size in fluidized fuel, ensuring the uniformity of fuel particle size, preventing large fuel particles from directly entering the subsequent combustion process and preventing wet fuel particles from entering the combustion system, which would lead to incomplete combustion or increased emissions, thereby improving the fineness of the fuel and combustion efficiency.

[0053] 3. The installation of the annular cooler water tank in this case is convenient and quick. The installation of the water tank insert plate adopts a sealant structure, reducing the amount of welding and improving construction efficiency. Moreover, when replacing it next time, only the old sealant needs to be removed for reinstallation, avoiding heavy work such as cutting and grinding, making subsequent maintenance extremely simple. In addition, an expansion joint is added to the upper water tank to effectively absorb the thermal expansion and contraction of the metal structure caused by temperature changes during the start-up, shutdown and operation of the annular cooler, preventing deformation, cracking or weld tearing of the annular cooler water tank structure due to the accumulation of thermal stress.

[0054] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A ring cooler flue gas recycling system, characterized in that: The ring cooler water tank, flue assembly, dust removal assembly (20), hot air fluidization assembly (30) and sorting and conveying assembly (40) are included. The ring cooler water tank includes an upper water tank and a lower water tank. The upper water tank is installed below the rotary frame of the ring cooler. The upper water tank is concave and provided with a plurality of air inlets. The lower water tank is installed on the bottom of the upper water tank. The upper water tank is provided with a receiving fan, a high-temperature fan and a medium-temperature fan. The receiving fan is installed in the receiving section of the ring cooler and is used to deliver cooling air to the receiving section of the ring cooler. The high-temperature fan is installed in the high-temperature section of the ring cooler. The medium-temperature fan is installed in the medium-temperature section of the ring cooler. The flue assembly includes a receiving flue, a medium-temperature section flue, a high-temperature section flue, a sintering boiler flue and a recycling flue. The air inlet end of the receiving flue is connected with the exhaust section of the receiving section of the ring cooler. The air inlet end of the medium-temperature section flue is connected with the exhaust section of the medium-temperature section of the ring cooler. The air inlet end of the high-temperature section flue is connected with the exhaust end of the high-temperature section of the ring cooler. The dust removal assembly (20) includes a dust remover (21) and a high-temperature induced draft flue (22). The dust remover (21) is provided with a medium-temperature air inlet (23) on the outside. The medium-temperature air inlet (23) is connected with the exhaust end of the medium-temperature section flue. The dust remover (21) is installed on the outer end of the installation ground. The outer end of the dust remover (21) is connected with the inner end of the high-temperature induced draft flue (22). The outer end of the high-temperature induced draft flue (22) is connected with the exhaust section of the high-temperature section flue and the exhaust section of the receiving flue. The hot air fluidization assembly (30) is installed on the inner end of the installation ground. The middle part of the hot air fluidization assembly (30) is connected with the inner end of the dust remover (21). The sorting and conveying assembly (40) is installed on the top of the hot air fluidization assembly (30). The top of the hot air fluidization assembly (30) is provided with a three-way joint. The three-way joint is provided with an electric control shunt valve. The air inlet end of the sintering boiler flue is connected with the temperature rising backflow end of the three-way joint. The exhaust end of the sintering boiler flue is connected with the sintering boiler return port. The air inlet end of the recycling flue is connected with the cold settlement air end of the three-way joint. The exhaust end of the recycling flue is connected with the air outlet of the medium-temperature section of the ring cooler.

2. The ring cooler flue gas recycling system according to claim 1, characterized in that: The hot air fluidization assembly (30) comprises a fluidization mounting frame (31), a bottom bucket element (32), an air induction rotating element (33) and an exhaust bucket element (34), the bottom of the fluidization mounting frame (31) is mounted to the inner end of the mounting ground, the bottom bucket element (32) comprises a cyclone bottom bucket (321) and an inverted conical material collecting cylinder (322), the bottom of the cyclone bottom bucket (321) is mounted to the top of the fluidization mounting frame (31), the cyclone bottom bucket (321) is connected to the inner end of the dust collector (21), the cyclone bottom bucket (321) is hollow inside to form a cyclone cavity (323), the outer edge of the cyclone bottom bucket (321) is hollow to form an annular heat insulation cavity (324), the top outer wall of the inverted conical material collecting cylinder (322) is mounted to the inner wall bottom of the cyclone bottom bucket (321), the bottom surface of the inverted conical material collecting cylinder (322) is mounted to the bottom surface of the cyclone cavity (323), the bottom surface of the cyclone cavity (323) is concave at both ends to form a discharge hole (325), the discharge hole (325) is convex to form a discharge pipe (326), the bottom surface of the cyclone cavity (323) is concave in the middle to form a rotating mounting hole (327), the top surface of the cyclone cavity (323) is concave in the middle to form an air outlet mounting hole (328), the air induction rotating element (33) is mounted to the rotating mounting hole (327) and the bottom surface of the cyclone cavity (323), and the exhaust bucket element (34) is mounted in the air outlet mounting hole (328).

3. The flue gas recycling system of the ring cooler according to claim 2, characterized in that: The air induction rotating element (33) comprises a rotating drive motor (331), a rotating drive shaft (330), a heat insulation conical cylinder (332), a plurality of air induction blades (333), a plurality of crushing hammer heads (334) and a material induction conical net (335), the rotating drive motor (331) is mounted in the rotating mounting hole (327), the bottom of the rotating drive shaft (330) is mounted in the output shaft of the rotating drive motor (331), the bottom of the heat insulation conical cylinder (332) is mounted to the bottom surface of the cyclone cavity (323), and the heat insulation conical cylinder (332) is arranged between the rotating mounting hole (327) and the discharge hole (325), the top of the heat insulation conical cylinder (332) is rotationally connected to the bottom of the outer wall of the rotating drive shaft (330), the inner ends of the plurality of air induction blades (333) are mounted to the top of the rotating drive shaft (330) in the height direction, the plurality of crushing hammer heads (334) are mounted to the outer ends of the plurality of air induction blades (333), and the middle of the material induction conical net (335) is mounted to the middle of the rotating drive shaft (330).

4. The flue gas recycling system of the ring cooler according to claim 3, characterized in that: The exhaust bucket element (34) comprises an exhaust vertical cylinder (341) and a material return inverted cone cylinder (342), the outer wall of the exhaust vertical cylinder (341) is installed in the exhaust installation hole (328), and an acceleration gap (343) is formed between the bottom surface of the exhaust vertical cylinder (341) and the bottom surface of the cyclone cavity (323), the bottom of the outer wall of the exhaust vertical cylinder (341) is provided with a spiral blade (344), the middle part of the outer wall of the exhaust vertical cylinder (341) is recessed to form a material feeding filling groove (345), the top of the outer wall of the exhaust vertical cylinder (341) is recessed to form a smoke outlet hole (346), the inlet end of the three-way joint is connected with the smoke outlet hole (346), and the outer wall of the bottom of the material return inverted cone cylinder (342) is protruded to form an installation connecting ring (347), and the outer wall of the installation connecting ring (347) is connected with the middle part of the inner wall of the exhaust vertical cylinder (341).

5. The flue gas recycling system of the ring cooler according to claim 4, characterized in that: The top surface of the installation connecting ring (347) is recessed to form a material return falling groove (348) in the circumferential direction, and the outer wall of the material return inverted cone cylinder (342) is recessed to form a vertical material return groove (349) at both ends.

6. The flue gas recycling system of the ring cooler according to claim 5, characterized in that: The sorting conveying assembly (40) comprises a sorting input shaft (41), a sorting spiral net (42), an inverted cone sorting cylinder (43) and a top sorting element (44), the bottom of the sorting input shaft (41) is installed on the top of the rotary driving shaft (330), the inner wall of the sorting spiral net (42) is installed on the middle part of the outer wall of the sorting input shaft (41), and the outer wall of the sorting spiral net (42) is slidably attached to the inner wall of the material return inverted cone cylinder (342), the bottom of the inverted cone sorting cylinder (43) is installed on the top surface of the material return inverted cone cylinder (342), and the top sorting element (44) is installed on the top of the sorting input shaft (41).

7. The ring cooler flue gas recycling system according to claim 6, characterized in that: The middle part of the inner wall of the inverted cone sorting cylinder (43) is recessed to form a re-sorting material return groove (431) in the circumferential direction, and the top of the inverted cone sorting cylinder (43) is recessed to form a wind gathering acceleration hole (432).

8. The flue gas recycling system of the ring cooler according to claim 7, characterized in that: The top sorting element (44) comprises an acceleration fan (441), a primary selection inverted cone cylinder (442) and a re-selection conical cylinder (443), the acceleration fan (441) is installed on the top of the sorting input shaft (41), the inner wall of the primary selection inverted cone cylinder (442) is installed on the outer wall of the acceleration fan (441), and the outer wall of the primary selection inverted cone cylinder (442) is slidably attached to the middle part of the inner wall of the inverted cone sorting cylinder (43), the bottom of the re-selection conical cylinder (443) is installed on the outer edge of the top surface of the acceleration fan (441), and the outer wall of the re-selection conical cylinder (443) and the top of the inner wall of the inverted cone sorting cylinder (43) form a re-material return gap (440).

9. The ring cooler flue gas recycling system of claim 8, wherein: The top surface of the sorting spiral net (42) is recessed to form a plurality of first sorting holes (421) in the circumferential direction, and the hole diameters of the plurality of first sorting holes (421) gradually decrease from bottom to top, the top surface of the primary selection inverted cone cylinder (442) is recessed to form a plurality of second sorting holes (444) in the circumferential direction, and the top surface of the re-selection conical cylinder (443) is recessed to form a plurality of third sorting holes (445) in the circumferential direction.

10. A water tank installation method of a ring cooler, applied to the flue gas recycling system of claim 9, characterized in that, The installation method comprises: Step S1: hoist the sink to the installation position, and install 3-5 groups of funnel water tanks in the water inlet area of the sink; Step S2: place the sink plug to the designed position of the sink, and smear high-temperature sealing glue on the joint surface of the sink plug and the sink; Step S3: Install the upper water tank under the rotary frame, and connect the lower water tank with the lower water tank.

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