An internal drying air classifier

Abstract

The utility model discloses an internal drying's powder concentrator, include: powder concentrator body, the top of powder concentrator body is connected with the sorting pipe, the output of sorting pipe is installed with fine powder hopper, the surface of powder concentrator body is installed with drying pipeline, the inside installation of drying pipeline has annular alloy pipe, the lower extreme of annular alloy pipe is provided with import, the upper extreme of annular alloy pipe is provided with export, the outside of import is connected with the fan heater, the drying pipeline has been installed on the main body structure of powder concentrator, and has designed annular alloy pipe, installs in the inside of drying pipeline, and the front end of annular alloy pipe is closely connected with an efficient fan heater, ensures the warm wind that produces in fan heater to be able to smoothly blow into annular alloy pipe inside, through this circulating flow's warm wind, the heat that combines annular alloy pipe emits can gently and effectively to fine powder carries out drying.

Description

Technical Field

[0001] This utility model relates to the field of air classifier technology, specifically an air classifier with internal drying. Background Technology

[0002] In the cement industry, cement mills account for about 45-50% of the total electricity consumption in production. Due to such a large range of electricity consumption, the electricity costs of some enterprises with high electricity consumption will inevitably be high. Therefore, how to reduce the electricity consumption of cement grinding systems will be a key task for cement grinding systems. How to better integrate the current grinding system with roller presses and give full play to the efficiency of roller presses and mills is an important aspect of process control. Among them, the air classifier is an indispensable screening device in the cement grinding system.

[0003] A centripetal high-efficiency air classifier is disclosed in CN207941711U, comprising an air classifier housing, a finished product outlet located at the top of the air classifier, an air inlet and a feed inlet connected to the air classifier housing, a coarse powder collecting cone located at the bottom of the air classifier housing, an air classifier rotor installed inside the air classifier housing, and moving blades arranged above and below the air classifier rotor, with stationary blades installed on the air classifier housing corresponding to the positions of the moving blades; the moving blades include an outer air fin section and an inner air fin section, with an arc transition between the outer air fin section and the inner air fin section; the technical effects of this centripetal air classifier, based on CFD theoretical analysis, laboratory tests, and industrial application production data, are mainly reflected in low air classifier resistance, high air classifier efficiency, and high separation clarity.

[0004] In the current cement production process, air classifiers play a crucial role, especially in the screening of coarse and fine powders from ground cement materials. During this process, fine powder particles are separated from the upper pipes by airflow, while coarser powder particles fall downwards due to gravity. However, there is a significant drawback in this coarse-fine powder separation process: the lack of a drying step for the separated powder. Therefore, before further processing, the separated powder needs to be preheated and dried in a preheater. This additional preheating and drying step undoubtedly increases the energy consumption of the preheater, leading to an increase in energy consumption throughout the cement processing. This situation is clearly detrimental to the energy-saving goals pursued by the cement production industry.

[0005] Therefore, those skilled in the art have provided an internally dried classifier to solve the problems mentioned in the background art. Utility Model Content

[0006] The purpose of this invention is to provide an internally dried air classifier to solve the problem mentioned in the background art that the existing air classifiers lack a drying function during use, which leads to increased energy consumption of the preheater used in subsequent processes.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An internally dried air classifier includes: an air classifier body, a sorting pipe connected to the top of the air classifier body, a fine powder hopper installed at the output end of the sorting pipe, a drying pipe installed on the surface of the air classifier body, an annular alloy tube installed inside the drying pipe, an inlet at the lower end of the annular alloy tube, an outlet at the upper end of the annular alloy tube, a warm air fan connected to the outside of the inlet, a feeding pipe connected to the lower end of the air classifier body, and a drying chamber installed at the lower end of the feeding pipe, nickel-chromium alloy sheets installed on the inner wall of the drying chamber, a heating tube rotatably installed inside the drying chamber, heat dissipation fins connected to the surface of the heating tube, and an electric wire connected to the upper end of the heating tube.

[0009] As a further embodiment of this utility model: the annular alloy tube is fixedly connected to the inner wall of the air classifier body, and the annular alloy tube is interconnected with the heater through an inlet.

[0010] As a further improvement of this utility model: the external structure of the drying chamber is spherical, the surface of the drying chamber is connected to an exhaust pipe, and a water bucket is installed at the lower end of the exhaust pipe.

[0011] As a further improvement of this utility model: a motor is fixedly installed at the lower end of the heating tube, and the heating tube and the drying chamber are rotatably connected.

[0012] As a further improvement of this utility model: a fan pipe is installed below the drying pipe, and a telescopic pipe is connected to the input end of the fan pipe.

[0013] As a further embodiment of this utility model: an inlet pipe is provided at the end of the telescopic pipe away from the fan duct, and the fan duct is interconnected with the inlet pipe through the telescopic pipe.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. A drying pipe is installed on the main structure of the air classifier, and an annular alloy tube is designed and installed inside the drying pipe. The front end of the annular alloy tube is tightly connected to a high-efficiency warm air blower to ensure that the warm air generated by the warm air blower can be smoothly blown into the interior of the annular alloy tube. To ensure that the heat can be transferred evenly and efficiently, aluminum alloy is specially selected for the annular alloy tube. It not only has good thermal conductivity, but also performs well in heat dissipation. It can effectively transfer the heat in the warm air to the internal space of the air classifier. As the airflow rises, the fine powder particles also float. The existence of the annular alloy tube is to dry these fine powders in this process. The dried fine powder is then guided by the sorting pipe. The air is guided and finally enters the fine powder hopper for collection. Furthermore, the design of the annular alloy tube takes into account fluid dynamics principles; it has not only a clearly defined inlet but also a corresponding outlet. Warm air enters the annular alloy tube from the inlet, flows along its interior, conforms to the internal structure of the classifier, and finally exits from the outlet. Because the fine powder particles are extremely small, and the properties of the powder dictate that it cannot withstand excessively high temperatures, this circulating warm air, combined with the heat emitted by the annular alloy tube, can gently and effectively dry the fine powder. When the dried fine powder enters the next production process, not only is its quality guaranteed, but the energy consumption of the preheater is significantly reduced, making the entire production process more efficient and energy-saving.

[0016] 2. A spherical drying chamber is installed at the lower end of the feeding pipe. This spherical drying chamber has a spacious internal space, making it particularly suitable for drying coarse powder. Compared with fine powder, coarse powder has a rougher texture and relatively larger particles. Therefore, a centralized drying method is needed to ensure the drying effect. Inside the drying chamber, heating tubes are also installed, with heat dissipation fins on both sides to enhance heat dissipation. When the heating tubes are powered on, the entire drying process is precisely controlled by a temperature controller to ensure the stability and efficiency of the drying process. To further increase the temperature inside the drying chamber and maintain a uniform temperature distribution, a motor is used to drive the heating tubes to rotate inside the drying chamber. This design can effectively avoid uneven temperature problems that may occur during the drying process. When drying coarse powder, a relatively large amount of water vapor is generated. A steam exhaust pipe is installed to guide this water vapor into a water tank for collection. This can effectively prevent water vapor from seeping back into the drying chamber, thereby avoiding a decrease in drying efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an air classifier with internal drying.

[0018] Figure 2 This is a schematic diagram of the internal structure of the drying chamber of an air classifier with internal drying.

[0019] Figure 3 This is a schematic diagram of the drying pipe structure in an internally dried air classifier.

[0020] Figure 4 This is a second-view structural diagram of the drying pipe in an internally dried air classifier.

[0021] In the diagram: 1. Air classifier body; 2. Sorting pipe; 3. Fine powder hopper; 4. Drying pipe; 5. Fan pipe; 6. Telescopic pipe; 7. Feeding pipe; 8. Drying chamber; 9. Nickel-chromium alloy sheet; 10. Wire; 11. Exhaust pipe; 12. Water tank; 13. Heating pipe; 14. Heat dissipation fins; 15. Motor; 16. Inlet pipe; 17. Warm air blower; 18. Annular alloy pipe; 19. Outlet; 20. Inlet. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-4 This utility model provides an internally dried powder classifier, including: a powder classifier body 1, a sorting pipe 2 connected to the top of the powder classifier body 1, a fine powder hopper 3 installed at the output end of the sorting pipe 2, a drying pipe 4 installed on the surface of the powder classifier body 1, a fan pipe 5 installed below the drying pipe 4, and a telescopic pipe 6 connected to the input end of the fan pipe 5. An inlet pipe 16 is provided at the end of the telescopic pipe 6 away from the fan pipe 5, and the fan pipe 5 is interconnected with the inlet pipe 16 through the telescopic pipe 6.

[0024] Specifically, air is introduced into the air classifier body 1 through the fan duct 5, thereby separating the powder inside the air classifier body 1 into coarse and fine particles. The air enters the fan duct 5 through the inlet pipe 16. The length of the fan duct 5 can be adjusted by using the telescopic pipe 6. By adjusting the length, the air force can be adjusted. The longer the air duct, the more air force is consumed and the air force is relatively weaker. Conversely, the shorter the air duct, the less air force is consumed and the air force is stronger. The telescopic pipe 6 adopts a corrugated structure, and the telescopic pipe 6 is adjusted by using folds. This not only ensures a stable output of air force, but also provides great convenience in actual operation. It allows users to flexibly adjust the air force according to different working needs to achieve the best powder classification effect.

[0025] An annular alloy pipe 18 is installed inside the drying pipe 4. An inlet 20 is provided at the lower end of the annular alloy pipe 18, and an outlet 19 is provided at the upper end of the annular alloy pipe 18. A heater 17 is connected to the outside of the inlet 20. The annular alloy pipe 18 is fixedly connected to the inner wall of the powder classifier body 1. The annular alloy pipe 18 is interconnected with the heater 17 through the inlet 20.

[0026] Specifically, the annular alloy tube 18 is fitted to the inner wall of the air classifier body 1, allowing it to fit tightly into the internal structure of the air classifier. The inlet 20 and outlet 19 of the annular alloy tube 18 are located inside the drying pipe 4, ensuring efficient hot air circulation. The inlet 20 of the annular alloy tube 18 is tightly connected to the heater 17, which acts as a heat source, blowing warm airflow into the annular alloy tube 18. The hot air circulates within the annular alloy tube 18, entering through the inlet 20 and flowing along the inner wall of the tube, fitting the internal structure of the air classifier and fully contacting the fine powder. Finally, the warm air exits from the outlet 19 of the annular alloy tube 18. This circulating warm air, combined with the heat emitted by the annular alloy tube 18, dries the fine powder. This drying method not only improves drying efficiency but also ensures the uniformity of the drying process, allowing the fine powder to be fully and evenly dried, thereby guaranteeing product quality.

[0027] The lower end of the air classifier is connected to a feeding pipe 7, and a drying chamber 8 is installed at the lower end of the feeding pipe 7. Nickel-chromium alloy sheets 9 are installed on the inner wall of the drying chamber 8. A heating tube 13 is rotatably installed inside the drying chamber 8. Heat dissipation fins 14 are connected to the surface of the heating tube 13. An electric wire 10 is connected to the upper end of the heating tube 13. The external structure of the drying chamber 8 is spherical. An exhaust pipe 11 is connected to the surface of the drying chamber 8. A water tank 12 is installed at the lower end of the exhaust pipe 11. A motor 15 is fixedly installed at the lower end of the heating tube 13, and the heating tube 13 and the drying chamber 8 are rotatably connected.

[0028] Specifically, the spherical drying chamber 8 is connected to the feeding pipe 7. Coarse powder enters the drying chamber 8 through the feeding pipe 7. The electric heating tube is driven to rotate by the motor 15. A heat-insulated coupling rod is installed at the lower end of the electric heating tube, which is connected to the motor 15. The electric heating tube rotates under the drive of the motor 15 to avoid uneven temperature during the drying process. Heat dissipation fins 14 are also installed on both sides of the heating tube 13 to enhance the heat dissipation effect. When the heating tube 13 is energized, the temperature of the entire drying process is precisely controlled by a thermostat. The water vapor from the drying process enters the exhaust pipe 11 and is introduced into the water tank 12 through the exhaust pipe 11 to prevent water vapor backflow, which would reduce the drying efficiency and increase the drying energy consumption. At the same time, the nickel-chromium alloy sheet 9 installed on the inner wall of the drying chamber 8 has the functions of high temperature resistance and oxidation resistance, and is used to protect the inner wall of the drying chamber 8.

[0029] The working principle of this utility model is as follows:

[0030] When using this invention, after the material enters the classifier, the blower pipe 5 is connected to the inlet pipe 16 via the telescopic pipe 6, introducing air into the interior of the classifier body 1 to separate the powder into coarse and fine particles. The fine powder rises with the airflow, and the tiny powder particles also float. The length of the telescopic pipe 6 can be flexibly adjusted according to different working requirements to achieve the best powder separation effect. The heater 17 is then started, blowing hot air into the annular alloy pipe 18. The hot air circulates within the annular alloy pipe 18, performing preliminary drying of the fine powder. The annular alloy pipe 18 serves to... In this process, the fine powder is dried. After drying, the fine powder is guided by the sorting pipe 2 and finally enters the fine powder hopper 3 for collection. Then, the coarse powder enters the drying chamber 8 from the feeding pipe 7. The motor 15 drives the heating tube 13 to rotate. After the heating tube 13 is heated by electricity, the heat dissipation effect is enhanced by the heat dissipation fins 14 to further dry the coarse powder. The water vapor generated during the drying process will enter the exhaust pipe 11 and be introduced into the water tank 12 through the exhaust pipe 11 to prevent water vapor back seepage. The entire drying and powder sorting process is efficient and uniform, ensuring the quality of the product.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A powder classifier with internal drying, characterized in that, include: The classifier body (1) has a sorting pipe (2) connected to its top. A fine powder hopper (3) is installed at the output end of the sorting pipe (2). A drying pipe (4) is installed on the surface of the classifier body (1). An annular alloy pipe (18) is installed inside the drying pipe (4). An inlet (20) is provided at the lower end of the annular alloy pipe (18). An outlet (19) is provided at the upper end of the annular alloy pipe (18). A warm air blower (17) is connected to the outside of the inlet (20). A feeding pipe (7) is connected to the lower end of the classifier. A drying chamber (8) is installed at the lower end of the feeding pipe (7). A nickel-chromium alloy sheet (9) is installed on the inner wall of the drying chamber (8). A heating tube (13) is rotatably installed inside the drying chamber (8). A heat dissipation fin (14) is connected to the surface of the heating tube (13). An electric wire (10) is connected to the upper end of the heating tube (13).

2. The air classifier with internal drying according to claim 1, characterized in that, The annular alloy tube (18) is fixedly connected to the inner wall of the air classifier body (1), and the annular alloy tube (18) is interconnected with the heater (17) through the inlet (20).

3. The air classifier with internal drying according to claim 1, characterized in that, The external structure of the drying chamber (8) is spherical. The surface of the drying chamber (8) is connected to a steam exhaust pipe (11), and a water bucket (12) is installed at the lower end of the steam exhaust pipe (11).

4. The air classifier with internal drying according to claim 1, characterized in that, The lower end of the heating tube (13) is fixedly equipped with a motor (15), and the heating tube (13) and the drying chamber (8) are rotatably connected.

5. The air classifier with internal drying according to claim 1, characterized in that, A fan duct (5) is installed below the drying duct (4), and a telescopic pipe (6) is connected to the input end of the fan duct (5).

6. The air classifier with internal drying according to claim 5, characterized in that, The telescopic pipe (6) is provided with an inlet pipe (16) at the end away from the fan pipe (5), and the fan pipe (5) is connected to the inlet pipe (16) through the telescopic pipe (6).

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