Discharging device for roller dryer for metallurgical materials

Abstract

The discharging device comprises a material guiding cover, a smoke channel, a rolling wheel, a first rotating shaft, a second rotating shaft, a spiral blade and a dust removing mechanism, a first discharging opening is formed in the lower portion of the material guiding cover, the smoke channel is in a U shape, and an inlet of the smoke channel is horizontally communicated with the first discharging opening; the first rotating shaft and the second rotating shaft form an L-shaped structure, the bevel gears are in meshing transmission connection, the rolling wheel is fixed to the first rotating shaft and used for being in friction rolling connection with a discharging port of the roller dryer, the spiral blade is fixed to the second rotating shaft, and the spiral blade and the second rotating shaft are jointly located in the smoke channel. An inlet of the flue gas channel is sequentially provided with a second discharge port and a dust removal mechanism; and the dust removal mechanism adsorbs smoke dust in the flue gas channel by using an oil film. No extra fan needs to be installed, energy is saved, meanwhile, the function of dust removal through an oil film in the discharging process is achieved, and the problem of environmental pollution is solved.

Description

Technical Field

[0001] The present invention relates to the field of waste gas treatment, and in particular to a discharging device for a drum dryer for metallurgical materials. Background Art

[0002] Before steelmaking and smelting, metallurgical materials must remove moisture and other volatile substances to avoid splashing during the smelting process. The equipment usually used is a drum dryer. After the materials are dried by the drum dryer, when the personnel discharge them into the storage barrel, a large amount of dust will be generated during the falling process of the materials and float in the air, seriously polluting the surrounding environment, and it is necessary to collect and treat the dust.

[0003] Patent document 201610296944.7 discloses a vacuum steelmaking special oil film type dust removal cooler and its dust removal method. The dust is discharged into the dust collector by a fan, and then reversely contacts with the oil discharged from above to achieve the function of adsorbing and removing dust from the materials. However, this method requires a suction fan to collect the waste gas first. Since the diameter of the discharge port of the drum dryer is very large and the diameter of the suction pipe of the suction fan is small, the two are obviously not well - matched. At the same time, during the dust removal process, the fan and the oil pump need to run continuously with electric energy, which is relatively energy - wasting and increases the cost of the enterprise. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a discharging device for a drum dryer for metallurgical materials, so as to solve the problems that the existing dust removal equipment is not well - matched with the drum dryer and additional energy is required during the dust removal process.

[0005] The purpose of the present invention is achieved by the following technical solutions: A discharging device for a drum dryer for metallurgical materials includes a material guiding cover, a flue gas passage, rollers, a first rotating shaft, a second rotating shaft, spiral blades, and a dust removal mechanism. A first discharge port is arranged at the lower part of the material guiding cover. The flue gas passage is in a U - shape. The inlet of the flue gas passage is horizontally connected to the first discharge port. The outlet of the flue gas passage is connected to the upper part of the material guiding cover. The first rotating shaft and the second rotating shaft form an L - shaped structure and are meshed and传动连接 (it should be "driven and connected" in English, but the original Chinese might have a wrong expression here. Assuming it's "driven and connected") by bevel gears. The rollers are fixed on the first rotating shaft, and the rollers are used for frictionally rolling connection with the discharge port of the drum dryer. The spiral blades are fixed on the second rotating shaft and are located in the flue gas passage together with the second rotating shaft. A second discharge port and a dust removal mechanism are sequentially arranged at the inlet of the flue gas passage. The dust removal mechanism uses oil film to adsorb the soot in the flue gas passage.

[0006] Principle description: The rotation of the drum dryer drives the roller to rotate, and the rotation of the roller drives the first rotating shaft and the second rotating shaft in turn. The spiral blades on the second rotating shaft rotate under the drive of the second rotating shaft, pushing the gas in the smoke channel to flow counterclockwise from bottom to top, so that the smoke generated during the discharge process enters the smoke channel and moves. The dust removal mechanism installed in the smoke channel absorbs the passing airflow.

[0007] Preferably, the dust removal mechanism includes an oil storage tank, a third rotating shaft, and a turntable. The first rotating shaft, the second rotating shaft, and the third rotating shaft form a U shape, and the three are connected by bevel gear meshing transmission. The third rotating shaft is located above the oil storage tank, and the turntable is fixedly connected coaxially with the third rotating shaft, and the turntable is partially immersed in the oil storage tank.

[0008] Preferably, a scraper is provided in the oil storage tank. The scraper can rotatably pass through the disk surface of the turntable. The scraper divides the oil in the oil storage tank into a U shape. The scraper has two functions. One is that it can quickly scrape off the oil that absorbs smoke particles, and the other is that it can separate the oil from the smoke, so that the oil coated on the turntable is free of impurities and the effect of absorbing smoke particles is better.

[0009] Preferably, there are multiple turntables, and multiple air holes are arranged on the turntables. The multiple turntables cut off the smoke channel, and the air holes on two adjacent turntables are staggered to make the smoke and dust move in a baffled direction, thereby improving the dust removal effect.

[0010] Preferably, a plurality of oil storage cavities are provided at the edge of the turntable, and the plurality of oil storage cavities are distributed in a ring-shaped manner. The oil storage cavities are provided with oil inlet holes. The oil storage cavities can store and release oil during the rotation of the turntable, thereby increasing the amount of oil film on the turntable and improving the dust collection effect.

[0011] Preferably, the oil storage chamber is a rectangular structure, and is further provided with a first oil outlet hole and a second oil outlet hole. The oil inlet hole is located at the edge of the turntable, and the first oil outlet hole and the second oil outlet hole are arranged close to the center of the turntable. The first oil outlet hole and the second oil outlet hole are relatively located at the corners of the oil storage chamber.

[0012] Preferably, a piston rod is provided in the oil storage chamber, and a driving mechanism is provided on the turntable, and the driving mechanism is used to push the piston rod to reciprocate in the oil storage chamber.

[0013] Preferably, a hollow chamber is provided at the center of the turntable, the driving mechanism includes a reducing disk, a fixing rod, and a spring, and all of them are located in the hollow chamber, the third rotating shaft is a tubular structure, the fixing rod is sleeved in the third rotating shaft, the fixing rod passes through the turntable and the third rotating shaft, and are respectively rotatably connected to the turntable and the third rotating shaft, the fixing rod passes through the reducing disk and is fixedly connected to the reducing disk, a fixing plate is provided at the end of the piston rod, the spring is sleeved on the piston rod, and the ends of the spring squeeze the fixing plate and the inner wall of the hollow chamber respectively, and the end of the piston rod pushes the arc surface of the reducing disk.

[0014] Preferably, the variable diameter disk includes a first sector, a second sector, and a third sector. The radius of the first sectors is equal, the radius of the second sector gradually decreases relative to the radius of the first sector, and the radius of the third sector gradually increases relative to the radius of the second sector. The first sector and the second sector are located below the variable diameter disk and are separated by the scraper.

[0015] The present invention has the following advantages: by utilizing the rotational power provided by the original drum dryer to drive the second rotating shaft and the third rotating shaft to rotate, the spiral blades on the second rotating shaft are driven to rotate to provide wind pressure, and the third rotating shaft drives the turntable to rotate to apply oil and absorb dust. The entire device does not require an additional fan and oil pump, saving energy, and at the same time realizing a high-efficiency dust removal function in the discharging process, solving the environmental pollution problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic cross-sectional structural diagram of embodiment 1 of the present invention;

[0017] Figure 2 yes Figure 1 The schematic diagram of the cross-sectional structure at A in the middle;

[0018] Figure 3 is a schematic cross-sectional structural diagram of embodiment 2 of the present invention;

[0019] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure at point B in the middle.

[0020] In the figure, 1, material guide hood; 2, smoke channel; 3, first discharge port; 4, roller; 5, first rotating shaft; 6, second rotating shaft; 7, spiral blade; 8, oil storage tank; 9, third rotating shaft; 10, turntable; 11, scraper; 12, fixed rod; 13, air hole; 14, oil storage chamber; 15, oil inlet hole; 16, first oil outlet hole; 17, second oil outlet hole; 18, hollow chamber; 19, reducing disk; 20, piston rod; 21, fixed plate; 22, spring; 23, first sector; 24, second sector; 25, third sector; 26, second discharge port. Detailed implementation manners

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Components of the embodiments of the present invention usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0023] Example 1

[0024] The drum dryer for metallurgical materials, also known as a rotary dryer, has a main body in the form of a horizontally transverse cylinder structure. Rings for supporting and driving the rotation of the cylinder are installed at both ends of the main body, and supporting rollers and a transmission mechanism for helping the cylinder rotate stably are installed below the main body.

[0025] An outlet device for a drum dryer for metallurgical materials, as Figure 1 shown, includes a material guiding cover 1, a flue gas passage 2, rollers 4, a first rotating shaft 5, a second rotating shaft 6, spiral blades 7, and a dust removal mechanism. The dust removal mechanism includes an oil storage tank (8), a third rotating shaft (9), and a turntable (10). The entire material guiding cover 1 is horizontally buckled at the outlet of the drum dryer and is rotationally and sealingly connected to the drum dryer. A first discharge port 3 is opened at the lower part of the material guiding cover 1. The flue gas passage 2 is in a C shape. The inlet of the flue gas passage 2 is horizontally connected to the first discharge port 3, and the outlet of the flue gas passage 2 is connected to the upper part of the material guiding cover 1.

[0026] The rollers 4 are fixed to the left end of the first rotating shaft 5. The rollers 4 are selected to be of a cylindrical structure. The first rotating shaft 5 passes through the material guiding cover 1 and is rotationally connected to the material guiding cover 1. The rollers 4 are located inside the material guiding cover 1 and are frictionally and rotationally connected to the inner cylindrical surface of the outlet of the drum dryer. The first rotating shaft 5, the second rotating shaft 6, and the third rotating shaft 9 form a C shape. A bevel gear is installed at the right end of the first rotating shaft 5. A bevel gear is installed at the upper end of the second rotating shaft 6 and is meshed with the right end of the first rotating shaft 5. A bevel gear is installed at the lower end of the second rotating shaft 6, and a bevel gear is installed on the third rotating shaft 9 and is meshed with the lower end of the second rotating shaft 6.

[0027] The inlet of the flue gas channel 2 is provided with a second discharge port 26 and an oil storage tank 8 in sequence. The second discharge port 26 is a tubular structure and is used to connect to an external receiving barrel. The metallurgical material enters the receiving barrel and the generated flue gas continues to flow backward in the flue gas channel 2.

[0028] The second rotating shaft 6 penetrates into the smoke channel 2, the spiral blade 7 is fixed on the second rotating shaft 6, and is located together with the second rotating shaft 6 in the vertical part of the smoke channel 2, the third rotating shaft 9 is a solid rod structure, the third rotating shaft 9 is located above the oil storage tank 8, the two ends of the third rotating shaft 9 are respectively rotatably connected to the side surfaces of the oil storage tank 8, the turntable 10 is coaxially fixedly connected to the third rotating shaft 9, the third rotating shaft 9 does not pass through the center of the turntable 10, the turntable 10 is partially immersed in the oil storage tank 8, and a certain volume of grease is stored in the oil storage tank 8.

[0029] In some embodiments, the turntable 10 is installed parallel to the smoke channel 2 so that the smoke blows through the left and right surfaces of the turntable 10. At the same time, brushes and other structures can be added to the turntable 10 to increase the dust collection area.

[0030] In some embodiments, Figure 1 As shown, there are multiple turntables 10, and multiple air holes 13 are arranged on the turntable 10. The air holes 13 are evenly spaced on the turntable 10. Multiple turntables 10 are arranged to cut off the flue gas channel 2. The air holes 13 on two adjacent turntables 10 are staggered so that the flue gas is blown directly toward the surface of the turntable 10 and flows backward through the air holes 13 in turn. The flue gas is baffled, and the metallurgical material particles in the flue gas continuously collide with the surface of the turntable 10 due to inertia during the baffle process, thereby improving the dust collection effect.

[0031] like Figure 1 , Figure 2 As shown, a scraper 11 is installed in the oil storage tank 8. The upper part of the scraper 11 is provided with a plurality of openings for accommodating the turntable 10. The lower part of the turntable 10 is located in the opening and the scraper 11 is close to the left and right disk surfaces of the turntable 10. The scraper 11 separates the oil in the oil storage tank 8 into a sedimentation area at the left end and a supernatant area at the right end. The two parts form a U-shaped structure. During the counterclockwise rotation of the turntable 10, the scraper 1 fixedly installed scraper scrapes the oil. The smoke particles scraped off by the scraper 11 move downward in the sedimentation area and finally fall into the bottom of the oil storage tank 8, realizing the stratification of oil and smoke particles. The clean oil moves to the right into the supernatant area, so that the turntable 10 can be coated with clean oil during the upward rotation, thereby improving the absorption effect of smoke.

[0032] The surface of the turntable 10 is relatively smooth, with less oil adhesion and low smoke and dust absorption capacity. A plurality of oil storage chambers 14 are provided at the edge of the turntable 10, and the plurality of oil storage chambers 14 are distributed in annular intervals. Each oil storage chamber 14 is provided with an oil inlet hole 15, and there are two oil inlet holes 15, which are respectively located on the left and right surfaces of the turntable. The oil storage chamber 14 is a rectangular structure, and the oil storage chamber 14 is also provided with two first oil outlet holes 16 and two second oil outlet holes 17, which are also distributed on the left and right surfaces of the turntable 10. The oil inlet hole 15 is located at the edge of the turntable 10, and the first oil outlet hole 16 and the second oil outlet hole 17 are arranged close to the center of the turntable 10. The first oil outlet hole 16 and the second oil outlet hole 17 are relatively located at the corner of the oil storage chamber 14. When the oil storage chamber 14 is located at the lower part of the turntable 10 during rotation, The oil storage chamber 14 is immersed below the oil surface of the oil storage tank 8, and the oil fills the oil storage chamber 14 through the oil inlet hole 15. During the counterclockwise rotation, the grease is discharged outward through the first oil outlet hole 16 and the second oil outlet hole 17 due to the action of gravity, and the highly viscous oil will flow downward along the disk surface of the turntable 10, realizing the oiling function. The first oil outlet hole 16 and the second oil outlet hole 17 are relatively located at the corners of the oil storage chamber 14, and are located at the lowest point of the oil storage chamber 14 at different rotational positions, which is conducive to the discharge of oil from the oil storage chamber 14. When using low-viscosity oil, in order to prevent the oil from spraying out in a columnar shape from the first oil outlet hole 16 and the second oil outlet hole 17, a filter screen can be added to the first oil outlet hole 16 and the second oil outlet hole 17 for interception, and the specific structure of the interception screen can be adjusted according to actual conditions.

[0033] Example 2

[0034] The difference between it and Example 1 is that Figure 4 As shown, a piston rod 20 is installed in each oil storage cavity 14, a driving mechanism is provided on the turntable 10, a hollow chamber 18 is provided in the center of the turntable 10, and the driving mechanism includes a variable diameter disc 19, a fixed rod 12, and a spring 22, and all of them are located in the hollow chamber 18, as shown in FIG. Figure 3 As shown, the third rotating shaft 9 is a tubular structure, the fixing rod 12 is sleeved in the third rotating shaft 9, the fixing rod 12 passes through the turntable 10 and the third rotating shaft 9, and is rotatably connected to the turntable 10 and the third rotating shaft 9 respectively, and the fixing rod 12 is fixedly connected to the side of the oil storage tank 8.

[0035] The fixed rod 12 passes through the reducing disk 19 and is fixedly connected to the reducing disk 19. The end of the piston rod 20 is sleeved with a fixing plate 21 and is welded to the fixing plate 21. The spring 22 is sleeved on the piston rod 20, and the ends of the spring 22 squeeze the fixing plate 21 and the inner wall of the hollow chamber 18 respectively. The end of the piston rod 20 pushes the arc surface of the reducing disk 19 under the squeezing of the spring 22.

[0036] like Figure 4As shown, the variable diameter disk 19 is composed of a first sector 23, a second sector 24, and a third sector 25. The radius of the first sector 23 is equal, the radius of the second sector 24 gradually decreases relative to the radius of the first sector 23, and the radius of the third sector 25 gradually increases relative to the minimum radius of the second sector 24 to be equal to the radius of the first sector 23. The first sector 23 and the second sector 24 are located below the lower variable diameter disk 19 and are separated by the scraper 11. The radius of the first sector 23 is the largest, and the first sector 23 pushes the piston. The piston rod 20 is used to block the oil inlet hole 15 to prevent the oil storage chamber 14 from taking in oil in the sedimentation area. The second sector 24 gradually shrinks under the radius of the first sector 23. Under the action of the spring 22, the piston rod 20 is pushed to move, so that the oil storage chamber 14 absorbs oil in the supernatant area. The third sector 25 gradually increases under the radius of the second sector 24 and is the same as the radius of the first sector 23, so that the piston rod 20 gradually squeezes out the oil in the oil storage chamber 14 and flows to the surface of the turntable 10, thereby increasing the oil content on the surface of the turntable and improving the dust removal effect.

[0037] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A discharging device for a drum dryer for metallurgical materials, characterized in that: It includes a material guiding cover (1), a flue gas passage (2), rollers (4), a first rotating shaft (5), a second rotating shaft (6), a spiral blade (7), and a dust removal mechanism. A first discharge port (3) is provided at the lower part of the material guiding cover (1). The flue gas passage (2) is in a U-shape. The inlet of the flue gas passage (2) is horizontally connected to the first discharge port (3), and the outlet of the flue gas passage (2) is connected to the upper part of the material guiding cover (1). The first rotating shaft (5) and the second rotating shaft (6) form an L-shaped structure and are connected by meshing bevel gears. The roller (4) is fixed on the first rotating shaft (5), and the roller (4) is used for frictionally rolling connection with the discharge port of the drum dryer. The spiral blade (7) is fixed on the second rotating shaft (6) and is located in the flue gas passage (2) together with the second rotating shaft (6). A second discharge port (26) and a dust removal mechanism are sequentially arranged at the inlet of the flue gas passage (2). The dust removal mechanism uses an oil film to adsorb the soot in the flue gas passage (2).

2. The discharging device for a drum dryer for metallurgical materials according to claim 1, characterized in that: The dust removal mechanism includes an oil storage tank (8), a third rotating shaft (9), and a turntable (10). The first rotating shaft (5), the second rotating shaft (6), and the third rotating shaft (9) form a U-shape and are connected by meshing bevel gears. The third rotating shaft (9) is located above the oil storage tank (8). The turntable (10) is coaxially and fixedly connected to the third rotating shaft (9), and a part of the turntable (10) is immersed in the oil storage tank (8).

3. The discharging device for a drum dryer for metallurgical materials according to claim 2, characterized in that: A scraper (11) is arranged in the oil storage tank (8). The scraper (11) rotatably passes through the disk surface of the turntable (10), and the scraper (11) divides the oil in the oil storage tank (8) into a U-shape.

4. The discharging device for a drum dryer for metallurgical materials according to claim 3, characterized in that: There are multiple turntables (10). Multiple air holes (13) are provided on the turntable (10). The multiple turntables (10) are arranged across the flue gas passage (2), and the air holes (13) on adjacent two turntables (10) are arranged in a staggered manner.

5. The discharging device for a drum dryer for metallurgical materials according to claim 4, characterized in that: Multiple oil storage cavities (14) are arranged at the edge of the turntable (10). The multiple oil storage cavities (14) are annularly and spacedly distributed. The oil storage cavity (14) is provided with an oil inlet hole (15).

6. The discharging device for a drum dryer for metallurgical materials according to claim 5, characterized in that: The oil storage cavity (14) is in a cuboid structure. The oil storage cavity (14) is also provided with a first oil outlet hole (16) and a second oil outlet hole (17). The oil inlet hole (15) is located at the edge of the turntable (10). The first oil outlet hole (16) and the second oil outlet hole (17) are close to the center of the turntable (10). The first oil outlet hole (16) and the second oil outlet hole (17) are relatively located at the corners of the oil storage cavity (14).

7. The discharging device for a drum dryer for metallurgical materials according to claim 5, characterized in that: A piston rod (20) is arranged in the oil storage cavity (14). A driving mechanism is arranged on the turntable (10), and the driving mechanism is used to push the piston rod (20) to reciprocate in the oil storage cavity (14).

8. The discharging device for a drum dryer for metallurgical materials according to claim 7, characterized in that: A hollow chamber (18) is arranged at the center of the rotating disk (10); the driving mechanism comprises a diameter reducing disk (19), a fixing rod (12), and a spring (22), all of which are located in the hollow chamber (18); the third rotating shaft (9) is a tubular structure; the fixing rod (12) is arranged in the third rotating shaft (9); the fixing rod (12) passes through the rotating disk (10) and the third rotating shaft (9), and is respectively connected to the rotating disk (10) and the third rotating shaft (9). 9) is rotatably connected, the fixed rod (12) passes through the reducing disk (19) and is fixedly connected to the reducing disk (19), the end of the piston rod (20) is provided with a fixing plate (21), the spring (22) is sleeved on the piston rod (20), and the end of the spring (22) respectively presses the fixing plate (21) and the inner wall of the hollow chamber (18), and the end of the piston rod (20) pushes the arc surface of the reducing disk (19).

9. The discharging device for a drum dryer for metallurgical materials according to claim 8, characterized in that: The variable diameter disk (19) comprises a first sector (23), a second sector (24), and a third sector (25); the radius of the first sector (23) is equal, the radius of the second sector (24) gradually decreases relative to the radius of the first sector (23), and the radius of the third sector (25) gradually increases relative to the radius of the second sector (24); the first sector (23) and the second sector (24) are located below the variable diameter disk (19) and are separated by the scraper (11).

Images