Multifunctional drying machine for pellet production

Abstract

The utility model relates to the technical field of pellet drying machines, and provides a multifunctional drying machine for pellet production, which comprises a drying tank and a screen drum, the screen drum is arranged inside the drying tank, an ash cavity is arranged between the drying tank and the screen drum, two ends of the drying tank are symmetrically provided with clamping grooves, and the clamping grooves are communicated with the screen drum. And clamping rings are symmetrically and fixedly connected to the two ends of the screen drum, the clamping rings are movably connected to the interiors of the clamping grooves, and a drying and screening assembly is arranged at the outer end of the drying tank. The outer ends of the pellets are cleaned through the screen drum rolling in the drying tank, slag attached to the outer ends of the pellets is condensed, the dried pellets are irregular in shape, meanwhile, the screen drum plays a role in screening the pellets, the falling slag and the pellets with small particle sizes can be stored in the ash hopper, and therefore the pellets can be dried conveniently. And in the process of cleaning the pellets, the hot air injection area is increased through the obliquely-arranged spray pipes, so that the separated pellets make full contact with the pellets, and the drying efficiency of the pellets is improved.

Description

Technical Field

[0001] This utility model relates to the field of pellet dryer technology, specifically to a multi-functional dryer for pellet production. Background Technology

[0002] Pelletizing is a process in which finely ground iron concentrate or other iron-containing powders are mixed with binders and moisture to form spherical iron-containing raw materials with certain strength and metallurgical properties. Pelletized ore is mainly used in blast furnace ironmaking as a "refined feedstock." It features uniform particle size, numerous micropores, good reducibility, and high strength, which can enhance blast furnace smelting. In addition, pellets can also be used in direct reduction ironmaking and steelmaking. Compared with sinter, pellet production is considered more energy-efficient and has lower emissions. Furthermore, pellets have higher grades and better metallurgical properties, making them suitable for long-distance transportation. Pelletizing requires drying during the production process. The main purpose of pellet drying is to remove moisture, improve the physical and chemical properties of the pellets, and prevent mold and bacterial growth. Undried green pellets are prone to plastic deformation and cracking. Rapid evaporation of moisture at high temperatures can cause green pellets to burst, worsening the permeability of the feed layer and reducing the roasting speed and uniformity.

[0003] During pellet production, mineral powder particles adhere to the outer edges of the pellets. After drying, these particles clump together at the outer edges. Existing drying methods are inconvenient for tumbling the pellets, resulting in reduced drying efficiency. Furthermore, slag that falls off the outer edges of the pellets during drying adheres to the damp edges, leading to irregular pellet shapes. To address these issues, a multi-functional dryer for pellet production is proposed. This dryer uses a sieve cylinder to tumble the pellets while simultaneously heating the interior of the drying tank with inclined nozzles. The sieve cylinder also cleans the slag adhering to the outer edges of the pellets, thus resolving the aforementioned problems. Utility Model Content

[0004] This utility model proposes a multi-functional dryer for pellet production, which solves the problems of low pellet heating efficiency and slag adsorption on the outer end of the pellets during the drying process, resulting in irregular pellet shape.

[0005] The technical solution of this utility model is as follows:

[0006] A multi-functional dryer for pellet production includes a drying tank and a sieve cylinder. The sieve cylinder is located inside the drying tank, and an ash chamber is provided between the drying tank and the sieve cylinder. The drying tank has symmetrical slots at both ends, and the sieve cylinder has symmetrically fixed retaining rings at both ends, which are movably connected inside the slots. The drying tank has a drying and screening assembly at its outer end, which includes side plates symmetrically engaged with the upper side of the outer end of the drying tank. A spray pipe is fixedly connected to the inner wall of the side plate and is located inside the ash chamber. A connecting pipe is fixedly connected between the two sets of side plates. The bottom of the drying tank has a groove, and an ash hopper is fixedly connected to the outer end of the groove. An ash pipe is fixedly connected to the bottom end of the ash hopper.

[0007] Optionally, the outer end of the screen cylinder is provided with a screen hole, the spray pipe is inclinedly arranged inside the ash chamber, the drying and screening assembly also includes toothed rings symmetrically fixedly connected to both ends of the screen cylinder, a connecting shaft is rotatably connected between the upper inner walls of the drying tank, and gears are symmetrically fixedly connected to the outer end of the connecting shaft, the toothed rings meshing with the gears.

[0008] Optionally, both the gear ring and the gear are located inside the drying tank. The drying and screening assembly also includes a servo motor fixedly connected to one side of the drying tank. The output end of the servo motor is fixedly connected to the connecting shaft. A sleeve rod is fixedly connected to the top of the drying tank, and the connecting shaft is rotatably connected to the inside of the sleeve rod.

[0009] Optionally, an air guide pipe is fixedly connected to the top end of the connecting pipe, and a dust removal pipe is fixedly connected to one end of the ash pipe. Both the air guide pipe and the dust removal pipe are flexible hoses.

[0010] Optionally, a discharge hopper is fixedly connected to one side of the drying tank. The discharge hopper has a funnel-shaped cross-section. A dust collector bag is snapped onto the outer end of the discharge hopper. A feed pipe is fixedly connected to the end of the drying tank away from the discharge hopper. The feed pipe is a folded pipe.

[0011] Optionally, the drying tank has an H-shaped cross-section, and a support rod is snapped between the two ends of the drying tank. The support rod has four rods arranged in a rectangular shape. The outer ends of the two support rods on the same side are snapped with mounting brackets. The outer ends of the mounting brackets are fixedly connected with chucks, and a floor frame is rotatably connected between the two chucks.

[0012] Optionally, the floor stand has an isosceles trapezoidal cross-section, and the height of the floor stand is greater than half the length of the drying tank.

[0013] Optionally, the outer end of the floor frame is provided with a flip groove, and the outer end of the chuck is fixedly connected with a positioning rod. The positioning rod is slidably connected inside the flip groove, and the flip groove is set at 90 degrees.

[0014] The working principle and beneficial effects of this utility model are as follows:

[0015] In this invention, a rotating screen cylinder inside the drying tank cleans the outer end of the pellets, causing the slag adhering to the outer end of the pellets to coagulate, resulting in irregular shapes of the dried pellets. At the same time, the screen cylinder also has a screening effect on the pellets, allowing the fallen slag and smaller pellets to be collected in the ash hopper. During the cleaning process, the inclined nozzle increases the area of ​​hot air jet, allowing the pellets to fully contact the pellets, thereby improving the drying efficiency of the pellets. Attached Figure Description

[0016] The preferred embodiments will be described below in a clear and easy-to-understand manner, in conjunction with the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages and implementation methods of this utility model.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the connection structure between the side plate and the nozzle of this utility model;

[0019] Figure 3 This is a schematic diagram of the connection structure between the drying tank and the ash hopper of this utility model;

[0020] Figure 4 This is a schematic diagram of the connection structure between the gear ring and the gear of this utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the drying tank and sieve cylinder of this utility model;

[0022] Figure 6 This is a schematic diagram of the connection structure between the flip groove and the positioning rod of this utility model.

[0023] In the diagram: 1. Drying tank; 2. Screen cylinder; 3. Slot; 4. Snap ring; 5. Drying and screening assembly; 501. Side plate; 502. Spray pipe; 503. Connecting pipe; 504. Ash hopper; 505. Ash pipe; 506. Gear ring; 507. Connecting shaft; 508. Gear; 509. Servo motor; 5010. Sleeve rod; 6. Air guide pipe; 7. Dust removal pipe; 8. Unloading hopper; 9. Dust removal bag; 10. Feed pipe; 11. Support rod; 12. Mounting frame; 13. Chuck; 14. Floor frame; 15. Tilting trough; 16. Positioning rod. Detailed Implementation

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0025] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0026] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] Example 1

[0029] Reference Figures 1-5This is the first embodiment of the present invention, which proposes a multi-functional dryer for pellet production, including a drying tank 1 and a screen cylinder 2. The screen cylinder 2 is located inside the drying tank 1, and an ash cavity is provided between the drying tank 1 and the screen cylinder 2. The two ends of the drying tank 1 are symmetrically provided with slots 3, and the two ends of the screen cylinder 2 are symmetrically fixedly connected with retaining rings 4, which are movably connected inside the slots 3. The outer end of the drying tank 1 is provided with a drying and screening assembly 5, which includes side plates 501 symmetrically attached to the upper side of the outer end of the drying tank 1. The inner wall of the side plates 501 is fixedly connected with a spray pipe 502, which is located inside the ash cavity. A connecting pipe 503 is fixedly connected between the two sets of side plates 501. The bottom end of the drying tank 1 is provided with a groove, and the outer end of the groove is fixedly connected with an ash hopper 504. The bottom end of the ash hopper 504 is fixedly connected with an ash pipe 505. The purpose of this setup is to place the pellets inside the sieve cylinder 2 before drying them. At this time, the sieve cylinder 2 rotates inside the drying tank 1, cleaning the pellets. This causes the slag attached to the outer end of the pellets and smaller pellets to fall into the ash cavity between the drying tank 1 and the sieve cylinder 2. During the cleaning and screening process, the hot airflow from the nozzle 502 flows inside the drying tank 1, tumbling the pellets and ensuring they come into full contact with the hot airflow, thus improving the drying efficiency. During the cleaning process of the sieve cylinder 2, the slag attached to the outer end and small pellets fall into the ash hopper 504 for collection.

[0030] Optionally, the outer end of the screen cylinder 2 is provided with a screen hole, and the spray pipe 502 is inclinedly arranged inside the ash chamber. The drying and screening assembly 5 also includes a toothed ring 506 symmetrically fixedly connected to both ends of the screen cylinder 2. A connecting shaft 507 is rotatably connected between the upper inner walls of the drying tank 1. A gear 508 is symmetrically fixedly connected to the outer end of the connecting shaft 507. The toothed ring 506 meshes with the gear 508. Both the toothed ring 506 and the gear 508 are located inside the drying tank 1. The drying and screening assembly 5 also includes a servo motor 509 fixedly connected to one side of the drying tank 1. The output end of the servo motor 509 is fixedly connected to the connecting shaft 507. A sleeve rod 5010 is fixedly connected to the top of the drying tank 1. The connecting shaft 507 is rotatably connected to the inside of the sleeve rod 5010. The purpose of this arrangement is that, during the process of screening the pellets by the sieve cylinder 2, the servo motor 509 drives the connecting shaft 507 to rotate inside the drying tank 1. The rotating connecting shaft 507 drives the gear 508 to rotate inside the drying tank 1. The rotating gear 508 drives the sieve cylinder 2 connected to the gear ring 506 to rotate inside the drying tank 1. The sleeve rod 5010 provides protection for the connecting shaft 507.

[0031] Optionally, a duct 6 is fixedly connected to the top end of the connecting pipe 503, and a dust removal pipe 7 is fixedly connected to one end of the ash pipe 505. Both the duct 6 and the dust removal pipe 7 are flexible hoses. The purpose of this arrangement is that the duct 6 and the dust removal pipe 7 are used to transport hot air and discharge slag and small pellets, respectively. The flexible duct 6 and the dust removal pipe 7 prevent bending and damage during the rotation of the drying tank 1.

[0032] Example 2

[0033] Reference Figure 3 and Figure 6 This is the second embodiment of the present invention, which differs from the first embodiment in that:

[0034] Compared to Embodiment 1, the further embodiment of the drying tank 1 has a discharge hopper 8 fixedly connected to one side. The discharge hopper 8 has a funnel-shaped cross-section, and a dust collector bag 9 is snapped onto the outer end of the discharge hopper 8. A feed pipe 10, which is a folded pipe, is fixedly connected to the end of the drying tank 1 away from the discharge hopper 8. The purpose of this arrangement is that the funnel-shaped discharge hopper 8 allows the drying tank 1 to quickly discharge material after being tilted, and also avoids material jamming inside the screen cylinder 2. During the drying process, a large amount of dust is generated inside the drying tank 1. The dust collector bag 9 filters and cleans the dust, preventing dust from being directly emitted and affecting the environment.

[0035] Optionally, the drying tank 1 has an H-shaped cross-section, and four rectangular support rods 11 are snapped between its two ends. Two support rods 11 on the same side are snapped with mounting brackets 12, and chucks 13 are fixedly connected to the outer ends of the mounting brackets 12. A floor frame 14 is rotatably connected between the two chucks 13. This arrangement allows the chucks 13 and floor frame 14 to facilitate the rotation of the drying tank 1, thereby facilitating the drying of the pellets inside the sieve cylinder 2.

[0036] Optionally, the cross-section of the floor frame 14 is an isosceles trapezoid, and the height of the floor frame 14 is greater than half the length of the drying tank 1. The purpose of this arrangement is that, since the height of the floor frame 14 is greater than half the length of the drying tank 1, there is a height difference between the unloading hopper 8 and the ground after the drying tank 1 is tilted, thereby facilitating the unloading operation.

[0037] Optionally, the outer end of the floor frame 14 is provided with a tilting groove 15, and the outer end of the chuck 13 is fixedly connected with a positioning rod 16. The positioning rod 16 is slidably connected inside the tilting groove 15, which is set at a 90-degree angle. The purpose of this setting is that the tilting groove 15, which is set at a 90-degree angle, allows the drying tank 1 to be tilted 90 degrees, so that during the drying process, the drying tank 1 is parallel to the ground, and during the unloading process, the tilted drying tank 1 is perpendicular to the ground.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A multi-functional dryer for pellet production, characterized in that, The device includes a drying tank (1) and a sieve cylinder (2). The sieve cylinder (2) is located inside the drying tank (1). A ash cavity is provided between the drying tank (1) and the sieve cylinder (2). The drying tank (1) has symmetrical slots (3) at both ends. The sieve cylinder (2) has symmetrically fixed rings (4) at both ends. The rings (4) are movably connected inside the slots (3). The drying tank (1) has a drying and screening assembly (5) at its outer end. The device includes side plates (501) symmetrically snapped onto the upper side of the outer end of the drying tank (1). A spray pipe (502) is fixedly connected to the inner wall of the side plate (501). The spray pipe (502) is located inside the ash chamber. A connecting pipe (503) is fixedly connected between the two sets of side plates (501). A groove is provided at the bottom end of the drying tank (1). An ash hopper (504) is fixedly connected to the outer end of the groove. An ash pipe (505) is fixedly connected to the bottom end of the ash hopper (504).

2. The multi-functional dryer for pellet production according to claim 1, characterized in that, The outer end of the screen cylinder (2) is provided with a screen hole, the spray pipe (502) is inclinedly arranged inside the ash chamber, the drying and screening assembly (5) also includes a toothed ring (506) symmetrically fixedly connected to both ends of the screen cylinder (2), a connecting shaft (507) is rotatably connected between the upper inner walls of the drying tank (1), and a gear (508) is symmetrically fixedly connected to the outer end of the connecting shaft (507), and the toothed ring (506) meshes with the gear (508).

3. A multi-functional dryer for pellet production according to claim 2, characterized in that, The gear ring (506) and the gear (508) are both located inside the drying tank (1). The drying and screening assembly (5) also includes a servo motor (509) fixedly connected to one side of the drying tank (1). The output end of the servo motor (509) is fixedly connected to the connecting shaft (507). A sleeve rod (5010) is fixedly connected to the top of the drying tank (1). The connecting shaft (507) is rotatably connected to the inside of the sleeve rod (5010).

4. A multi-functional dryer for pellet production according to claim 1, characterized in that, The top end of the connecting pipe (503) is fixedly connected to an air guide pipe (6), and one end of the gray pipe (505) is fixedly connected to a dust removal pipe (7). Both the air guide pipe (6) and the dust removal pipe (7) are flexible hoses.

5. A multi-functional dryer for pellet production according to claim 1, characterized in that, A discharge hopper (8) is fixedly connected to one side of the drying tank (1). The discharge hopper (8) has a funnel-shaped cross section. A dust collector bag (9) is attached to the outer end of the discharge hopper (8). A feed pipe (10) is fixedly connected to the end of the drying tank (1) away from the discharge hopper (8). The feed pipe (10) is a folded pipe.

6. A multi-functional dryer for pellet production according to claim 1, characterized in that, The drying tank (1) has an H-shaped cross section. Support rods (11) are snapped between the two ends of the drying tank (1). There are four support rods (11) arranged in a rectangular shape. The outer ends of the two support rods (11) on the same side are snapped with mounting brackets (12). The outer ends of the mounting brackets (12) are fixedly connected with chucks (13). A floor frame (14) is rotatably connected between the two chucks (13).

7. A multi-functional dryer for pellet production according to claim 6, characterized in that, The cross-section of the floor stand (14) is an isosceles trapezoid, and the height of the floor stand (14) is greater than half the length of the drying tank (1).

8. A multi-functional dryer for pellet production according to claim 6, characterized in that, The outer end of the floor frame (14) is provided with a flip groove (15), and the outer end of the chuck (13) is fixedly connected with a positioning rod (16). The positioning rod (16) is slidably connected to the inside of the flip groove (15), and the flip groove (15) is set at 90 degrees.

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