Rotary kiln hot air integration device for drying coal slime waste

Abstract

The invention provides a rotary kiln hot air integration device for drying coal slime waste, and relates to the technical field of coal slime impurity treatment, and the device comprises a rotary kiln component, a feeding component, a discharging guide conical cylinder and a cold ring machine component which are obliquely arranged. The two ends of the rotary kiln component are supported by mounting fixing rings, the feeding end of the rotary kiln component is connected with the feeding component and used for feeding wet coal slime, and the discharging end is sequentially connected with the discharging guide cone and the cold ring machine component. The hot blast stove is connected to the discharging end of the rotary kiln, and high-temperature flue gas is introduced into the rotary kiln to dry the upstream wet coal slime. Detectors are arranged on the installation fixing rings at the two ends and used for monitoring the flow and humidity of inlet and outlet materials in real time, parameters of the hot blast stove are adjusted through data comparison feedback, and accurate temperature control and energy saving are achieved. An air cooler is arranged at the bottom of the cold ring machine assembly and used for cooling the dried high-temperature coal slime, and hot waste gas generated by cooling is extracted by an exhaust fan and conveyed to the feeding component to preheat the initial wet coal slime.

Description

Technical Field

[0001] This invention relates to the field of coal slime impurity treatment technology, and in particular to a rotary kiln hot air integrated device for drying coal slime waste. Background Technology

[0002] Coal washing generates a large amount of byproducts—coal slime—characterized by high moisture content, high viscosity, and low calorific value. Traditionally, it has been difficult to utilize effectively and is often treated as waste, resulting in land occupation and environmental pollution. However, with the increasing scarcity of energy resources, drying and upgrading coal slime as a potential fuel resource for reuse has become an important way to achieve resource recycling and energy conservation and emission reduction.

[0003] Existing coal slime drying technologies, such as drum dryers and airflow dryers, often suffer from low thermal efficiency, uneven drying, high energy consumption, and equipment clogging. In particular, the waste heat contained in the large amount of hot, humid exhaust gas generated during the drying process is not fully recovered and utilized; direct emission wastes energy and increases thermal pollution. Furthermore, if the high-temperature material after drying is not cooled promptly, it poses safety hazards and affects subsequent storage and transportation. Therefore, there is an urgent need for a coal slime treatment device that integrates efficient drying, waste heat recovery, and material cooling to achieve efficient energy conversion and optimized process control in the utilization of coal slime resources. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated hot air device for rotary kilns used for drying coal slime waste, in order to solve the technical problems existing in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A rotary kiln hot air integrated device for drying coal slime waste includes a rotary kiln component, a feeding component, a discharge guide cone, and a cooling ring assembly. The rotary kiln component is in an inclined state, and both its feed end and discharge end are equipped with mounting rings that rotate with it. The mounting rings are externally connected to a fixing frame structure for stable support of the rotary kiln component. One end of the feeding component is connected to the mounting ring located at the feed end of the rotary kiln component, and it is used to continuously feed viscous wet coal slime into the rotary kiln component. The cooling ring assembly is connected to the mounting ring located at the discharge end of the rotary kiln component via the discharge guide cone, and the cooling ring assembly is used for... The system receives coal slime material from the rotary kiln components and moves it along a circular track. A cold air fan is distributed at the bottom of the cold ring assembly, used to supply cold air into the cold ring assembly. Two detectors are installed on each of the two mounting rings, respectively detecting the material flow rate and humidity passing through the mounting rings. It also includes an exhaust fan and a hot air furnace, the hot air furnace being connected to the mounting ring located at the discharge end of the rotary kiln components and supplying a drying airflow into the rotary kiln components. The exhaust fan is located on the cold ring assembly near the discharge point, and is used to send the hot air discharged from the cold ring assembly into the feeding component.

[0007] Based on the above technical solutions, the present invention also provides the following optional technical solutions:

[0008] In one alternative embodiment: the rotary kiln component includes a cylindrical body, lifting strips, and a rotary gear ring. Both ends of the cylindrical body extend into and rotate within a mounting ring. The rotary gear ring is fixed to the outer wall of the cylindrical body. A rotary motor is mounted on the mounting frame structure, and the output end of the rotary motor has a drive gear that meshes with the rotary gear ring. Multiple lifting strips are distributed on the inner wall of the cylindrical body, and the lifting strips are arranged along the axis of the cylindrical body.

[0009] In one alternative embodiment: the fixing frame structure is further provided with at least one annular toothed disc, which is sleeved around the outer side of the cylindrical part; the inner side of the cylindrical part is further provided with at least one material turning unit corresponding to the annular toothed disc, the material turning unit includes a material turning main shaft and multiple material turning rods, the material turning main shaft is rotatably mounted on the inner wall of the cylindrical part, and its two ends extend to the outer side of the cylindrical part, the end of the material turning main shaft has a material turning gear, the material turning gear meshing with the annular toothed disc; multiple material turning rods are equally spaced on the material turning main shaft, and their center lines are perpendicular to the axis of the material turning main shaft.

[0010] In one alternative embodiment: the feeding component includes an outer feeding cylinder, a feeding port, an inner feeding cylinder, and a feeding auger located inside the inner feeding cylinder. One end of the outer feeding cylinder is connected to an installation and fixing ring located at the feed end of the rotary kiln component. The inner feeding cylinder is located inside the outer feeding cylinder, and its outer wall and the inner wall of the outer feeding cylinder form a preheating chamber, which is connected to the interior of the rotary kiln component. The exhaust end of the blower is connected to the outer wall of the outer feeding cylinder near the rotary kiln component via an air guide pipe, and is connected to the preheating chamber. The feeding port is located at the end of the outer feeding cylinder away from the installation and fixing ring, and is connected to the interior of the inner feeding cylinder.

[0011] In one alternative: the inner wall of the feeding cylinder has two spiral baffles that divide the preheating chamber into two spiral flow channels. The end of the feeding cylinder facing the rotary kiln component is provided with a baffle plate, wherein the baffle plate has an air hole that communicates with one of the spiral flow channels, and the air guide pipe is connected to the other spiral flow channel.

[0012] In one alternative embodiment: the cold ring machine assembly includes a fixed outer ring shell, an inner movable annular plate, a material support grate, and a rotary drive unit. The fixed outer ring shell and the inner movable annular plate form an annular cavity. The upper and lower edges of the inner movable annular plate are rotatably engaged with the fixed outer ring shell. The rotary drive unit is located at the center of the fixed outer ring shell and is connected to the side wall of the inner movable annular plate, and is used to drive its rotation. The material support grate is located inside the annular cavity and is fixedly connected to the side wall of the inner movable annular plate. The material support grate has multiple circumferentially evenly distributed partitions that divide the annular cavity into multiple receiving cavities.

[0013] In one alternative: the outer wall of the fixed outer ring shell has a discharge notch in the discharge area, and the material support grate is inclined with its bottom end facing the fixed outer ring shell.

[0014] By adopting the above technical solution, the present invention has the following beneficial effects:

[0015] This invention constructs a complete thermal energy recycling system. High-temperature flue gas from the hot blast furnace is used in the main drying process. The residual heat released during material cooling after drying is absorbed by the cold air to form hot waste gas, which is then recovered for preheating the initial wet coal slime. This tiered energy consumption mode of "high-temperature drying - medium-temperature preheating" maximizes the recovery and utilization of internal waste heat, significantly reducing energy consumption from the external heat source (hot blast furnace), resulting in high overall thermal efficiency. By installing detectors at the inlet and outlet of the rotary kiln, real-time monitoring of material flow and humidity changes allows for precise judgment of drying effect and material residue within the kiln. Based on this data, the flue gas flow and temperature of the hot blast furnace can be intelligently adjusted to achieve precise control of the drying process, avoiding energy waste while ensuring that the discharged coal slime meets the expected drying indicators, resulting in stable product quality. The device organically integrates multiple functional units such as rotary kiln drying, cold air cooling, and waste heat recovery preheating, resulting in a compact structure. The counter-current drying method ensures sufficient heat exchange; forced cooling ensures product safety and convenient subsequent processing; and the multi-stage utilization of hot air simplifies the external thermal system. This integrated design optimizes the entire process flow, improving equipment processing capacity and operational continuity and stability. Through efficient drying technology, it transforms difficult-to-process wet coal slurry into usable low-moisture fuel, turning waste into treasure and reducing the environmental pressure caused by solid waste accumulation. Simultaneously, the efficient utilization of internal thermal energy reduces the demand for external energy, indirectly lowering carbon emissions and aligning with green environmental protection and sustainable development requirements. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the rotary kiln hot air integrated device for drying coal slime waste in this invention.

[0018] Figure 2 This is a schematic diagram of the rotary kiln component structure in one embodiment of the present invention.

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of a rotary kiln component in one embodiment of the present invention.

[0020] Figure 4 This is a schematic diagram of the feeding component structure in one embodiment of the present invention.

[0021] Figure 5 This is a schematic diagram of the cold ring machine assembly structure in one embodiment of the present invention.

[0022] Figure reference numerals: Rotary kiln component 100, cylinder section 110, lifting blades 120, rotary gear ring 130, tipping unit 140, tipping main shaft 141, tipping gear 142, tipping rod 143, annular gear disc 150, feeding component 200, outer feeding cylinder 210, feeding port 220, inner feeding cylinder 230, spiral partition 240, spiral guide channel 250, feeding auger 2 60, baffle plate 270, discharge guide cone 300, cold ring machine assembly 400, fixed outer ring shell 410, inner movable ring plate 420, material support grate 430, partition plate 440, rotary drive unit 450, discharge notch 460, exhaust fan 500, air guide pipe 510, cold air fan 600, hot air furnace 700, mounting and fixing ring 800, detector 810, rotary motor 900. Detailed Implementation

[0023] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] The left, right, up, and down positions of the various components shown in the attached diagram are just one arrangement method; the specific positions should be set according to specific needs.

[0025] In one embodiment, such as Figures 1-3As shown, a rotary kiln hot air integrated device for drying coal slime waste includes a rotary kiln component 100, a feeding component 200, a discharge guide cone 300, and a cooling ring assembly 400. The rotary kiln component 100 is in an inclined state, and both its feed end and discharge end are provided with mounting and fixing rings 800 that rotate with it. The mounting and fixing rings 800 are externally connected to a fixing frame structure for stable support of the rotary kiln component 100. One end of the feeding component 200 is connected to the mounting and fixing ring 800 located at the feed end of the rotary kiln component 100, and it is used to continuously feed viscous wet coal slime into the rotary kiln component 100. The cooling ring assembly 400 is connected to the mounting and fixing ring 800 located at the discharge end of the rotary kiln component 100 through the discharge guide cone 300, and the cooling ring assembly 400 is used to receive the incoming... The coal slime material from the rotary kiln component 100 moves along a circular trajectory; a cold air fan 600 is distributed at the bottom of the cold ring machine component 400, which is used to send cold air into the cold ring machine component 400; two detectors 810 are provided on each of the two mounting rings 800, and the two detectors 810 respectively detect the material flow rate and humidity passing through the mounting ring 800; it also includes an exhaust fan 500 and a hot air furnace 700, the hot air furnace 700 is connected to the mounting ring 800 located at the discharge end of the rotary kiln component 100, and inputs dry airflow into the rotary kiln component 100; the exhaust fan 500 is provided on the cold ring machine component 400 and located near the discharge point, and the exhaust fan 500 is used to send the hot flow discharged from the cold ring machine component 400 into the feeding component 200.

[0026] In this embodiment of the invention, the feeding component 200 feeds wet coal slime into the rotary kiln component 100 via the mounting and fixing ring 800. The rotary kiln component 100 remains in a rotating state. The hot blast stove 700 sends high-temperature flue gas into the rotary kiln component 100. The flue gas flows against the direction of movement of the wet coal slime towards the discharge end of the rotary kiln component 100. The wet coal slime is added from the feed end of the higher rotary kiln component 100. Due to the rotation and inclination of the rotary kiln component 100, the wet coal slime gradually moves towards the lower rotary kiln component while tumbling. The discharge end of component 100 moves; during this process, the wet coal slime is heated by the high-temperature flue gas injected into the feed end of the rotary kiln component 100, undergoing a complex and thorough heat exchange, and the temperature gradually increases to achieve the purpose of drying; the flue gas enters the feeding component 200 through the discharge end of the rotary kiln component 100 to preheat the wet coal slime inside the feeding component 200, thereby improving the efficiency of subsequent drying; the detector 810 on the mounting ring 800 detects the flow at the feed end and discharge end of the rotary kiln component 100 respectively. The humidity and flow rate of the wet coal slime are compared. By comparing the humidity of the wet coal slime passing through both ends of the rotary kiln component 100, the dryness of the wet coal slime after passing through the rotation and heat exchange of the rotary kiln component 100 under a certain flow rate of high-temperature flue gas can be confirmed. At the same time, by comparing the flow rates of the wet coal slime detected by the two detectors 810, it can be confirmed whether wet coal slime is easily retained inside the rotary kiln component 100. Based on the flow rate of the wet coal slime and the dryness after passing through the rotary kiln component 100, the hot blast stove 700 is adjusted to feed the appropriate amount of wet coal slime. The rate and flow rate of the high-temperature flue gas are controlled to improve the drying degree of the wet coal slime and avoid excessive high-temperature flue gas that would waste energy. The dried coal slime is guided into the cold ring mill assembly 400 via the discharge guide cone 300 and moves with the assembly in a rotating motion until it reaches the unloading area. While the coal slime moves within the cold ring mill assembly 400, the cold air fan 600 supplies cold air into it. Upon contact with the high-temperature coal slime, a strong heat exchange occurs. The cold air is heated by the coal slime into high-temperature hot exhaust gas, while the coal slime itself is rapidly cooled. This high-temperature hot exhaust gas is then drawn into the feeding component 200 by the exhaust fan 500 to preheat the coal slime within, thus fully utilizing the heat and improving the overall thermal efficiency of the process. The fixed frame structure is a conventional existing technology, mainly serving a supporting function, and is not shown in the attached diagram. The detector 810 includes a humidity sensor and a microwave / radar flow meter. The microwave / radar flow meter emits microwave signals to the flowing material and receives the signals reflected back by the material. By analyzing the frequency change (Doppler effect) or time difference of the reflected signal, the flow velocity and flow rate of the material can be calculated; this is existing technology.

[0027] In one embodiment, such as Figures 1-3As shown, the rotary kiln component 100 includes a cylindrical body 110, lifting blades 120, and a rotary gear ring 130. Both ends of the cylindrical body 110 extend into and rotatably engage with the mounting ring 800. The rotary gear ring 130 is fixed to the outer wall of the cylindrical body 110. A rotary motor 900 is mounted on the mounting frame structure, and the output end of the rotary motor 900 has a drive gear that meshes with the rotary gear ring 130. Multiple lifting blades 120 are distributed on the inner wall of the cylindrical body 110, and the lifting blades 120 move along... The axis of the cylinder 110 is set; in this embodiment of the invention, the cylinder 110 can rotate freely due to the rotational engagement of its two ends with the mounting and fixing rings 800. The rotary motor 900 drives the cylinder 110 to rotate through the transmission of the drive gear meshing with the rotary gear ring 130. The rotating cylinder 110 can roll the wet coal slurry and carry it to a certain height through the lifting strips 120 on its inner wall and friction. The wet coal slurry slides down due to gravity. This cyclical movement makes the wet coal slurry move forward in a "rolling" manner.

[0028] In one embodiment, such as Figures 1-3 As shown, the fixing frame structure is also provided with at least one annular gear disc 150, which is sleeved around the outside of the cylindrical part 110; the cylindrical part 110 is also provided with at least one turning unit 140 corresponding to the annular gear disc 150. The turning unit 140 includes a turning main shaft 141 and multiple turning rods 143. The turning main shaft 141 is rotatably mounted on the inner wall of the cylindrical part 110, and its two ends extend to the outside of the cylindrical part 110. The end of the turning main shaft 141 has a turning gear 142, which meshes with the annular gear disc 150; multiple turning rods 143, etc. The spacing is set on the turning main shaft 141, and its center line is perpendicular to the axis of the turning main shaft 141. In this embodiment of the invention, the cylinder part 110 rotates under the drive of the rotary motor 900 to turn the wet coal slurry circumferentially. The turning unit 140 rotates with the cylinder part 110. Due to the meshing of the turning gear 142 and the annular toothed disc 150, the turning main shaft 141 also rotates on its own axis when rotating around the center of the cylinder part 110. The turning rod 143 rotates with the turning main shaft 141 and turns the wet coal slurry axially on the path of the wet coal slurry moving downward, further breaking up the wet coal slurry, preventing the wet coal slurry from clumping together, and promoting its contact with hot air.

[0029] In one embodiment, such as Figure 1 , Figure 2 and Figure 4As shown, the feeding component 200 includes a feeding outer cylinder 210, a feeding port 220, a feeding inner cylinder 230, and a feeding auger 260 disposed inside the feeding inner cylinder 230. One end of the feeding outer cylinder 210 is connected to the mounting ring 800 located at the feed end of the rotary kiln component 100. The feeding inner cylinder 230 is disposed inside the feeding outer cylinder 210, and a preheating chamber is formed between its outer wall and the inner wall of the feeding outer cylinder 210. The preheating chamber is connected to the interior of the rotary kiln component 100. The exhaust end of the exhaust fan 500 is connected to the outer wall of the feeding outer cylinder 210 near the rotary kiln component 100 through an air guide pipe 510, and is connected to the preheating chamber. The feeding port 220 is located on the feeding outer cylinder 210 away from the mounting ring 800. The end of 00 is connected to the inside of the inner feeding cylinder 230. In this embodiment of the invention, wet coal slurry enters the inner feeding cylinder 230 through the feeding port 220, and is then fed to the inside of the rotary kiln component 100 by the feeding auger 260 through a spiral push. The high-temperature flue gas inside the rotary kiln component 100 will enter the preheating chamber, and the exhaust fan 500 will guide the hot airflow inside the cold ring machine component 400 into the preheating chamber through the air guide pipe 510. Therefore, the hot airflow flows in the preheating chamber and indirectly heats and dries the wet coal slurry through the metal wall. The heating method is gentle, and the wet coal slurry will not quickly form a crust on the surface due to direct contact with the high-temperature airflow, which greatly reduces the risk of adhesion and blockage, and also avoids the airflow from hindering the conveying of wet coal slurry in the inner feeding cylinder 230.

[0030] In one embodiment, such as Figure 1 , Figure 2 and Figure 4 As shown, the inner wall of the feeding inner cylinder 230 has two spiral baffles 240, which divide the preheating chamber into two spiral guide channels 250. A baffle plate 270 is provided at the end of the feeding inner cylinder 230 facing the rotary kiln component 100. The baffle plate 270 has an air hole communicating with one of the spiral guide channels 250. The air guide pipe 510 is connected to the other spiral guide channel 250. In this embodiment, the high-temperature flue gas flowing out of the rotary kiln component 100 flows into one of the spiral guide channels 250 through the air hole on the baffle plate 270. Inside the spiral flow channel 250, the air flows spirally along the outer wall of the inner feeding cylinder 230 to increase the flow time and improve the contact surface with the inner feeding cylinder 230, thereby improving the preheating effect. The exhaust fan 500 sends the hot airflow inside the cold ring machine assembly 400 into another spiral flow channel 250 through the air guide pipe 510, and the airflow flows there. The two spiral flow channels 250 are clearly separated to avoid the airflow introduced by the air guide pipe 510 from colliding with the high-temperature flue gas flowing into the rotary kiln component 100, which would increase the impact force of the airflow on the outer wall of the inner feeding cylinder 230.

[0031] In one embodiment, such as Figure 1 and Figure 5As shown, the cold ring machine assembly 400 includes a fixed outer ring shell 410, an inner movable annular plate 420, a material support grate 430, and a rotary drive unit 450. The fixed outer ring shell 410 and the inner movable annular plate 420 form an annular cavity. The upper and lower edges of the inner movable annular plate 420 are rotatably engaged with the fixed outer ring shell 410. The rotary drive unit 450 is located at the center of the fixed outer ring shell 410 and is connected to the side wall of the inner movable annular plate 420, driving it to rotate. The material support grate 430 is located inside the annular cavity and is fixedly connected to the side wall of the inner movable annular plate 420. The material support grate 430 has multiple circumferentially evenly distributed partitions 440, which divide the annular cavity into multiple receiving cavities. In this embodiment of the invention, the coal slime material falling into the annular cavity through the discharge guide cone 300 falls onto the material support grate 430 and is located inside one of the receiving cavities. The rotation drive unit 450 acts on the inner movable annular plate 420, causing the material support grate 430 and the receiving cavity to rotate. The coal slime material rotates towards the unloading area in a rotating manner. At the same time, the cold air fan 600 sends cold airflow from the bottom of the fixed outer ring shell 410 into the annular cavity to achieve heat exchange and cool the coal slime material.

[0032] In one embodiment, such as Figure 1 and Figure 5 As shown, the outer wall of the fixed outer ring shell 410 has a discharge notch 460 in the discharge area, and the material support grate 430 is inclined with its bottom end facing the fixed outer ring shell 410. In this embodiment of the invention, since the material support grate 430 is inclined, when the coal slime material rotates to the discharge area, the coal slime material in the receiving cavity can automatically fall from the discharge notch 460 into the discharge equipment to achieve automatic discharge.

[0033] The above-described embodiments of the invention propose an integrated hot air device for a rotary kiln used for drying coal slime waste, the working principle of which is as follows:

[0034] This device achieves efficient and continuous drying and cooling of wet coal slime through the coordinated operation of the rotary kiln component 100, the feeding component 200, the cooling ring assembly 400, and the hot air system, while fully utilizing thermal energy to improve overall thermal efficiency. Its specific workflow is as follows:

[0035] 1. Wet coal slime is fed and preheated. The wet coal slime enters the inner feeding cylinder 230 through the feeding port 220 of the feeding component 200, and is continuously conveyed to the feed end of the rotary kiln component 100 by the internal feeding auger 260 via a spiral pushing method. During this process, the wet coal slime is indirectly preheated. High-temperature flue gas from the discharge end of the rotary kiln component 100 flows counter-currently into the preheating chamber between the outer feeding cylinder 210 and the inner feeding cylinder 230, and flows along one of the spiral guide channels 250. At the same time, the exhaust fan 500 introduces the hot exhaust gas after heat exchange in the cooling ring assembly 400 into the other spiral guide channel 250 through the pipe 510. The hot air flow in the two channels gently heats the wet coal slime inside the inner feeding cylinder 230 through the metal wall, avoiding direct contact that could cause surface crusting or blockage, and reducing airflow interference with the conveying process.

[0036] 2. Drying process inside the rotary kiln

[0037] The preheated wet coal slime enters the inclined rotary kiln cylinder section 110:

[0038] The rotary motor 900 drives the rotary gear ring 130 through the drive gear, causing the cylinder part 110 to rotate slowly. During the rotation, the lifting strips 120 on the inner wall of the cylinder part 110 repeatedly lift and scatter the coal slurry, forming a "rolling" propulsion, so that the coal slurry gradually moves to the lower discharge end. When the turning unit 140 revolves with the cylinder part 110, its turning gear 142 meshes with the fixed ring gear 150, causing the turning main shaft 141 to rotate, which drives the turning rod 143 to axially disperse the coal slurry, prevent clumping, and increase the contact area with hot air. The hot air furnace 700 injects high-temperature flue gas into the discharge end of the rotary kiln component 100. The flue gas flows against the direction of coal slurry flow and fully exchanges heat with the coal slurry, so that the coal slurry temperature gradually increases and the moisture evaporates and dries.

[0039] 3. Material and airflow monitoring and control

[0040] The detector 810, which is installed on the mounting ring 800 at the inlet and outlet ends, includes a humidity sensor and a microwave / radar flow meter to monitor the humidity and flow rate of the coal slime in real time. By comparing the data at both ends, the drying effect can be judged. If the humidity of the output is too high, the flue gas flow rate or temperature of the hot air furnace 700 will be adjusted.

[0041] Flow rate comparison can monitor the residue in the kiln and prevent material accumulation. At the same time, it can dynamically optimize the hot air supply based on the flow rate and drying requirements to achieve energy-saving operation.

[0042] 4. Coal slime cooling and waste heat recovery

[0043] After drying, the coal slime falls into the annular cavity of the cold ring machine assembly 400 through the discharge guide cone 300; the rotary drive unit 450 drives the inner movable annular plate 420 and the material support grate 430 to rotate, and the coal slime moves circumferentially to the unloading area in the receiving cavity separated by the partition 440; the cold air fan 600 sends cold air into the annular cavity from the bottom, which instantly exchanges heat with the high temperature coal slime, and the coal slime is rapidly cooled, while the cold air is heated into hot exhaust gas; the inclined material support grate 430 in the unloading area causes the coal slime to automatically fall into the downstream equipment through the unloading gap 460; the exhaust fan 500 draws the hot exhaust gas generated by heat exchange in the annular cavity to the preheating cavity of the feeding component 200 for preheating the wet coal slime, realizing the recycling of heat energy.

[0044] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

Claims

1. A rotary kiln hot air integrated device for drying coal slime waste, comprising a rotary kiln component, a feeding component, a discharge guide cone, and a cooling ring assembly, characterized in that, The rotary kiln component is in an inclined state, and both its feed end and discharge end are provided with mounting and fixing rings that rotate with it. The mounting and fixing rings are connected to a fixing frame structure to stably support the rotary kiln component. One end of the feeding component is connected to the mounting ring located at the feed end of the rotary kiln component, which is used to continuously feed viscous wet coal slime into the rotary kiln component. The cold ring machine assembly is connected to the mounting and fixing ring located at the discharge end of the rotary kiln component via a discharge guide cone. The cold ring machine assembly is used to receive coal slime material from the rotary kiln component and move along a circular trajectory. Cold air fans are distributed at the bottom of the cold ring machine assembly, and the cold air fans are used to send cold air into the cold ring machine assembly. Two detectors are installed on each of the two mounting rings. The two detectors detect the material flow rate and humidity passing through the inside of the mounting ring. It also includes exhaust fans and hot air furnaces; The hot air furnace is connected to the mounting and fixing ring located at the discharge end of the rotary kiln component, and inputs a drying airflow into the rotary kiln component; The exhaust fan is mounted on the cold ring machine assembly and located near the unloading point. The exhaust fan is used to send the hot flow discharged from the cold ring machine assembly into the feeding component.

2. The rotary kiln hot air integrated device for drying coal slime waste according to claim 1, characterized in that, The rotary kiln components include a cylindrical body, lifting plates, and a rotary gear ring. Both ends of the cylindrical part extend into the interior of the mounting and fixing ring and rotate with it. The rotary gear ring is fixed on the outer wall of the cylindrical part. A rotary motor is provided on the fixing frame structure. The output end of the rotary motor has a drive gear that meshes with the rotary gear ring. The lifting plates are multiple and distributed on the inner wall of the cylinder, and the lifting plates are arranged along the axis of the cylinder.

3. The rotary kiln hot air integrated device for drying coal slime waste according to claim 2, characterized in that, The fixed frame structure is also provided with at least one annular toothed disc, which is sleeved on the outside of the cylindrical part; the inside of the cylindrical part is also provided with at least one material turning unit corresponding to the annular toothed disc. The material turning unit includes a material turning main shaft and multiple material turning rods. The material turning main shaft is rotatably mounted on the inner wall of the cylindrical part, and its two ends extend to the outside of the cylindrical part. The end of the material turning main shaft has a material turning gear, which meshes with the annular toothed disc; multiple material turning rods are equally spaced on the material turning main shaft, and their center lines are perpendicular to the axis of the material turning main shaft.

4. The rotary kiln hot air integrated device for drying coal slime waste according to claim 1, characterized in that, The feeding component includes an outer feeding cylinder, a feeding port, an inner feeding cylinder and a feeding auger located inside the inner feeding cylinder; One end of the outer feeding cylinder is connected to the mounting and fixing ring located at the feed end of the rotary kiln component. The inner feeding cylinder is located inside the outer feeding cylinder, and a preheating cavity is formed between its outer wall and the inner wall of the outer feeding cylinder. The preheating cavity is connected to the inside of the rotary kiln component. The exhaust end of the blower is connected to the outer wall of the feeding cylinder near the rotary kiln component via an air guide pipe, and is also connected to the preheating chamber. The feeding port is located at the end of the outer feeding cylinder away from the mounting ring, and it is connected to the interior of the inner feeding cylinder.

5. The rotary kiln hot air integrated device for drying coal slime waste according to claim 4, characterized in that, The inner wall of the feeding cylinder has two spiral baffles, which divide the preheating chamber into two spiral flow channels. The end of the feeding cylinder facing the rotary kiln component is provided with a baffle plate, wherein the baffle plate has an air hole that communicates with one of the spiral flow channels, and the air guide pipe is connected to the other spiral flow channel.

6. The rotary kiln hot air integrated device for drying coal slime waste according to claim 1, characterized in that, The cold ring machine assembly includes a fixed outer ring shell, an inner movable annular plate, a material support grate, and a rotary drive unit. The fixed outer ring shell and the inner movable ring plate form an annular cavity. The upper and lower edges of the inner movable ring plate are rotatably engaged with the fixed outer ring shell. The rotation drive unit is located at the center of the fixed outer ring shell and is connected to the side wall of the inner movable ring plate, and is used to drive it to rotate. The material support grate is located inside the annular cavity and is fixedly connected to the side wall of the inner movable annular plate. The material support grate has multiple circumferentially evenly distributed partitions, which divide the annular cavity into multiple receiving cavities.

7. The rotary kiln hot air integrated device for drying coal slime waste according to claim 6, characterized in that, The outer wall of the fixed outer ring shell has a discharge notch in the discharge area, and the material support grate is inclined with its bottom end facing the fixed outer ring shell.

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