A pellet drying equipment with an air supply system
By introducing an air supply system and a spiral mesh plate into the pellet drying equipment, the problems of high impurities and high energy consumption in traditional equipment have been solved, achieving efficient and energy-saving pellet drying results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENAN DAMAIS MACHINERY EQUIPMENT CO LTD
- Filing Date
- 2025-09-12
- Publication Date
- 2026-07-31
AI Technical Summary
Traditional pellet drying equipment lacks a suitable air supply system, resulting in excessive impurities in the hot air and high energy consumption, which affects the drying effect.
A pellet drying device with an air supply system was designed, including a hot air furnace, a heat exchange shell, a filter, an exhaust fan, and a spiral mesh plate. The filter filters impurities, and the waste heat of the exhaust gas is used to preheat the air. Combined with the spiral mesh plate, the uniformity and efficiency of the pellets in the drying chamber are improved.
It reduces impurities in the hot air, improves the drying effect, reduces energy consumption by utilizing waste heat, ensures uniform drying of pellets, and avoids drying dead spots.
Smart Images
Figure CN224580663U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of pellet drying equipment, specifically to a pellet drying equipment with an air supply system. Background Technology
[0002] Pellets are artificial blocky raw materials made from finely ground iron concentrate powder or other iron-containing powders through processes such as pelletizing and roasting. They are mainly used in blast furnace ironmaking. In the pellet production process, the powdered ore is first mixed with an appropriate amount of water and binder to form green pellets with uniform viscosity and sufficient strength. After drying and preheating, the green pellets are roasted in an oxidizing atmosphere to agglomerate and form pellet ore. Drying equipment is required when drying the pellets.
[0003] During pellet drying, the formed pellets are placed into the drying equipment, where high-temperature gas removes the moisture from the pellets, thus achieving the purpose of drying the pellets.
[0004] Traditional pellet drying equipment mostly relies on hot air blowers or electric heating furnaces for internal heating, but lacks a suitable air supply system. This leads to problems such as excessive impurities in the hot air and high energy consumption during pellet drying, which affect the drying effect. Therefore, we propose a pellet drying equipment with an air supply system. Utility Model Content
[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a pellet drying equipment with an air supply system, which can effectively solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution: This utility model provides a pellet drying device with an air supply system, comprising: A base, on top of which is mounted a drying chamber for drying pellets; The gas supply mechanism includes a hot air furnace installed on the top of the base, a hot air outlet pipe fixedly connected to the air outlet of the hot air furnace, a heat exchange shell fixedly connected to the top of the base, an exhaust fan installed on the top of the drying box, an exhaust pipe installed at the air outlet of the exhaust fan, the other end of the exhaust pipe passing through the heat exchange shell and extending to the outside of the heat exchange shell, and heat exchange fins evenly distributed fixedly connected to the outside of the exhaust pipe. The drying mechanism includes a spiral mesh plate fixedly connected to the inner wall of the drying chamber. A box is provided at the bottom of the drying chamber, a protective net is provided at the top of the box, and a feed pipe for the pellets to be dried is provided at the top of the drying chamber.
[0007] Preferably, an air intake pipe for external air intake is installed on the top of the heat exchange shell, and a filter for filtering air impurities is installed in the middle of the air intake pipe.
[0008] Preferably, a connecting pipe communicating with the inside of the heat exchange shell is fixedly connected to the outside of the heat exchange shell, a blower is installed at the other end of the connecting pipe, a blower air supply pipe is fixedly connected to the air outlet of the blower, and the other end of the blower air supply pipe is connected to the air inlet of the hot air furnace.
[0009] Preferably, the end of the hot air outlet pipe away from the hot air furnace is connected to the inside of the box, and an air volume control valve is installed in the middle of the hot air outlet pipe.
[0010] Preferably, the bottom of the drying oven has an installation groove, and the box body is installed on the inner wall of the installation groove.
[0011] Preferably, the drying box has a discharge trough on its outer side, and the inner wall of the discharge trough is provided with a discharge plate connected to one end of the spiral mesh plate.
[0012] Preferably, a side plate adapted to the shape of the spiral mesh plate is fixedly connected to the side of the spiral mesh plate away from the inner wall of the drying chamber, and a material control valve is provided in the middle of the feed pipe.
[0013] The technical solution provided by this utility model has the following advantages compared with the known prior art: 1. By setting up an air supply system, this utility model can filter impurities in the incoming air when drying pellets, ensuring that the impurities in the hot air entering the drying chamber are reduced, thereby improving the drying effect on the pellets. Furthermore, by utilizing the waste heat from the exhaust gas discharged from the drying chamber to heat the air entering the hot air furnace, the energy consumption of the hot air furnace when heating the air is reduced, thus improving the practicality of the air supply system.
[0014] 2. By setting up a drying mechanism, the pellets to be dried are put into the feed pipe at the top of the drying box and roll down on the spiral mesh plate. During the rolling, they are evenly dried by the hot air inside the drying box, avoiding the formation of drying dead corners. As the pellets roll down, the temperature gradually increases, further improving the drying effect of the pellets. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the overall structure of the pellet drying equipment of this utility model from the front. Figure 2 This is a side view of the overall structure of the pellet drying equipment of this utility model; Figure 3 This is a schematic cross-sectional view of the drying oven of this utility model. Figure 4 This is a schematic diagram of the gas supply mechanism of this utility model.
[0017] The labels in the diagram represent: 1. Base; 2. Drying chamber; 3. Air supply mechanism; 301. Exhaust fan; 302. Waste gas pipe; 303. Air inlet pipe; 304. Filter; 305. Heat exchange shell; 306. Connecting pipe; 307. Blower; 308. Blower air supply pipe; 309. Hot air furnace; 310. Hot air outlet pipe; 311. Air volume control valve; 312. Heat exchange fins; 4. Drying mechanism; 401. Feed pipe; 402. Material control valve; 403. Side plate; 404. Spiral mesh plate; 405. Mounting groove; 406. Protective net; 407. Box body; 408. Discharge plate. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0019] The present invention will be further described below with reference to the embodiments.
[0020] Example 1: Reference Figure 1-4 The first embodiment of this utility model discloses a pellet drying device with an air supply system, comprising: Base 1, with a drying box 2 for pellet drying installed on top of base 1; The air supply mechanism 3 includes a hot air furnace 309 mounted on top of the base 1. A hot air outlet pipe 310 is fixedly connected to the air outlet of the hot air furnace 309, which transports the hot air generated by the hot air furnace 309 to the bottom of the drying chamber 2. A heat exchange shell 305 is fixedly connected to the top of the base 1, which preheats the fresh air about to enter the hot air furnace 309. An exhaust fan 301 is installed on the top of the drying chamber 2, which forces the exhaust of air from the drying chamber 2. After heat exchange, the humid and hot exhaust gas carries moisture. An exhaust pipe 302 is installed at the outlet of the exhaust fan 301. The exhaust pipe 302 is used to guide the humid and hot exhaust gas into the heat exchange shell 305. The other end of the exhaust pipe 302 passes through the heat exchange shell 305 and extends to the outside of the heat exchange shell 305. Heat exchange fins 312 with equal spacing are fixedly connected to the outside of the exhaust pipe 302. These heat exchange fins 312 are used to efficiently transfer the residual heat in the exhaust gas to the fresh air flowing through the heat exchange shell 305.
[0021] Specifically, an air inlet pipe 303 for external air intake is installed on the top of the heat exchange shell 305, and a filter 304 for filtering air impurities is installed in the middle of the air inlet pipe 303.
[0022] Fresh air from outside is drawn in through this intake pipe 303 and impurities are removed by the filter 304.
[0023] Specifically, a connecting pipe 306 that communicates with the inside of the heat exchange shell 305 is fixedly connected to the outside of the heat exchange shell 305. A blower 307 is installed at the other end of the connecting pipe 306. A blower air supply pipe 308 is fixedly connected to the air outlet of the blower 307. The other end of the blower air supply pipe 308 is connected to the air inlet of the hot air furnace 309.
[0024] When the blower 307 is working, it creates a negative pressure inside the heat exchange shell 305, driving external air to enter the heat exchange shell 305 through the air inlet pipe 303; at the same time, it extracts the preheated air from the heat exchange shell 305 and then delivers the preheated air to the hot air furnace 309 for heating.
[0025] Specifically, the end of the hot air outlet pipe 310 away from the hot air furnace 309 is connected to the inside of the box 407, through which hot air enters the box 407 and is eventually evenly distributed to the bottom of the drying chamber 2. An air volume control valve 311 is installed in the middle of the hot air outlet pipe 310 to precisely adjust the flow rate of hot air entering the drying chamber 2.
[0026] Example 2: Reference Figure 1-4 This is the second embodiment of the present invention, which differs from the first embodiment in that: The drying mechanism 4 includes a spiral mesh plate 404 fixedly connected to the inner wall of the drying chamber 2. The spiral mesh plate 404 forms the movement path of the pellets in the drying chamber 2. Its spiral inclined structure makes the pellets roll from top to bottom under the action of gravity, thereby increasing the residence time of the pellets inside the drying chamber 2. A box body 407 is provided at the bottom of the drying chamber 2. The box body 407 receives hot air from the hot air outlet pipe 310 and serves as the starting chamber for hot air to enter the drying chamber 2. A protective net 406 is provided at the top of the box body 407. A feed pipe 401 is provided at the top of the drying chamber 2 for the pellets to be dried to enter. The pellets to be dried are fed in through this pipe and fall on the top of the spiral mesh plate 404.
[0027] Specifically, the bottom of the drying oven 2 is provided with an installation groove 405, and the box body 407 is installed on the inner wall of the installation groove 405 to ensure that the box body 407 is stably installed and communicates with the bottom space of the drying oven 2.
[0028] Specifically, a discharge trough is provided on the outside of the drying box 2, and a discharge plate 408 connected to one end of the spiral mesh plate 404 is provided on the inner wall of the discharge trough.
[0029] The dried pellets roll off the spiral mesh plate 404 at the end to the discharge plate 408 and are discharged from the equipment through the discharge chute.
[0030] Specifically, a side plate 403 adapted to the shape of the spiral mesh plate 404 is fixedly connected to the side of the spiral mesh plate 404 away from the inner wall of the drying chamber 2. The side plate 403 is set along the outer edge of the spiral mesh plate 404 to prevent the pellets from falling off the edge of the mesh plate during the rolling process. A material control valve 402 is set in the middle of the feed pipe 401 to adjust and control the speed at which the pellets enter the drying chamber 2 to match the drying requirements.
[0031] The remaining structure is the same as that in Example 1.
[0032] The workflow of this utility model is as follows: When drying the pellets, the blower 307 and the hot air furnace 309 are started. The blower 307 draws air from the heat exchange shell 305, making the heat exchange shell 305 negative pressure. External air is drawn in through the air inlet pipe 303. The filter 304 filters the impurities in the air entering through the air inlet pipe 303. The filtered air enters the hot air furnace 309, where it is heated. The heated air enters the drying chamber 2 through the hot air outlet pipe 310 and the box 407. The hot air flows upward from the bottom of the drying chamber 2. The amount of hot air entering the drying chamber 2 can be controlled and adjusted by the air volume control valve 311. The pellets that need to be dried enter the drying chamber 2 through the feed pipe 401 and fall onto the spiral mesh plate 404. Under the action of the pellets' own gravity and the inclined surface of the spiral mesh plate 404, they roll downwards. The upward flowing hot air dries the rolling pellets. After drying, the pellets are discharged from the drying chamber 2 through the discharge plate 408 and enter the next process. The feeding speed of the feed pipe 401 can be controlled and adjusted by the material control valve 402. The moisture inside the pellets flows upwards with the hot air to the top of the drying chamber 2 and is discharged through the exhaust fan 301. The hot air discharged by the exhaust fan 301 enters the heat exchange shell 305 through the exhaust pipe 302. The air inside the heat exchange shell 305 is preheated by the heat exchange fins 312. The preheated air enters the hot air furnace 309 and is heated by the hot air furnace 309.
[0033] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.
Claims
1. A pellet drying apparatus with a gas supply system, characterized in that, include: A base (1) is provided with a drying box (2) for drying pellets on top of the base (1). The gas supply mechanism (3) includes a hot air furnace (309) installed on the top of the base (1). The hot air furnace (309) is fixedly connected to a hot air outlet pipe (310). The top of the base (1) is fixedly connected to a heat exchange shell (305). The top of the drying box (2) is provided with an exhaust fan (301). The exhaust fan (301) is equipped with a waste gas pipe (302) at its outlet. The other end of the waste gas pipe (302) passes through the heat exchange shell (305) and extends to the outside of the heat exchange shell (305). Heat exchange fins (312) are fixedly connected to the outside of the waste gas pipe (302) at equal intervals. The drying mechanism (4) includes a spiral mesh plate (404) fixedly connected to the inner wall of the drying box (2). The bottom of the drying box (2) is provided with a box body (407), the top of the box body (407) is provided with a protective net (406), and the top of the drying box (2) is provided with a feed pipe (401) for the pellets to be dried to enter.
2. A pellet drying apparatus with a gas supply system according to claim 1, characterized in that, The heat exchange shell (305) is equipped with an air inlet pipe (303) for the entry of external air, and a filter (304) for filtering air impurities is installed in the middle of the air inlet pipe (303).
3. A pellet drying apparatus with a gas supply system according to claim 1, characterized in that, A connecting pipe (306) communicating with the inside of the heat exchange shell (305) is fixedly connected to the outside of the heat exchange shell (305). A blower (307) is installed at the other end of the connecting pipe (306). A blower air supply pipe (308) is fixedly connected to the air outlet of the blower (307). The other end of the blower air supply pipe (308) is connected to the air inlet of the hot air furnace (309).
4. A pellet drying apparatus with a gas supply system according to claim 1, characterized in that, The end of the hot air outlet pipe (310) away from the hot air furnace (309) is connected to the inside of the box body (407), and an air volume control valve (311) is installed in the middle of the hot air outlet pipe (310).
5. A pellet drying apparatus with a gas supply system according to claim 1, characterized in that, The drying oven (2) has an installation groove (405) at the bottom, and the box body (407) is installed on the inner wall of the installation groove (405).
6. A pellet drying apparatus with a gas supply system according to claim 1, characterized in that, The drying box (2) has a discharge trough on its outer side, and the inner wall of the discharge trough is provided with a discharge plate (408) connected to one end of the spiral mesh plate (404).
7. A pellet drying apparatus with a gas supply system according to claim 1, characterized in that, The spiral mesh plate (404) is fixedly connected to a side plate (403) that is adapted to the shape of the spiral mesh plate (404) on the side away from the inner wall of the drying box (2), and a material control valve (402) is provided in the middle of the feed pipe (401).