Kettle type drying and rotary kiln sintering combined equipment

Abstract

The utility model relates to kettle type drying and rotary kiln sintering combined equipment which is provided with an operation table. A rotary kiln barrel is rotatably arranged on the top surface of the operation table; a feeding cover is arranged on one side of the rotary kiln barrel, and a discharging cover is arranged on the other side of the rotary kiln barrel; a discharge hole is formed in the bottom of the discharge cover; the drying system further comprises at least two pot type dryers and elephant trunks. The kettle type dryer is located above the feeding cover and used for drying materials to be sintered; one end of the elephant trunk is communicated with a discharge port of the pot type dryer, the other end of the elephant trunk penetrates through the feeding cover and extends into the rotary kiln cylinder, and materials to be sintered slide into the rotary kiln cylinder through the elephant trunk; the operation table is further provided with a heating device and a driving device. The heating device is used for heating the rotary kiln barrel; and the driving device is used for driving the rotary kiln barrel to rotate. The utility model has the advantages that the inner wall of the rotary kiln cylinder is prevented from adhering sediments, regular cleaning is not needed, the production efficiency is improved, and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal equipment, in particular to a combined device of pot-type drying and rotary kiln sintering. Background Art

[0002] As a common industrial equipment, rotary kiln is widely used in various industries due to its ability to achieve uniform heating and high production efficiency. However, in the sintering process of certain specific materials, such as the sintering of lithium battery positive electrode materials, the raw materials contain a large amount of moisture and impurities, resulting in the generation of impurities such as tar during the sintering process. These impurities will adhere to the inner wall of the rotary kiln cylinder. Over time, these deposits will continue to increase, causing the thickness of the inner wall of the rotary kiln cylinder to increase, thereby reducing production capacity, increasing energy consumption, and affecting the normal operation of the rotary kiln.

[0003] In order to solve this problem, the rotary kiln cylinder must be cleaned and maintained regularly. However, cleaning the inner wall of the rotary kiln cylinder is difficult, time-consuming and labor-intensive. During the cleaning process, production needs to be stopped, which affects production progress.

[0004] The existing kettle dryer is a low-speed stirring intermittent drying equipment with large processing capacity and high drying efficiency. It can stir the material when it is turned forward and can self-clean the bottom and inner wall of the kettle when it is turned reversely. Since the stirring paddle continuously stirs at a low speed, it can prevent the material from becoming hardened due to "agglomeration", and the material is heated evenly, which has a good drying effect; at the same time, the bottom and inner wall of the kettle can be self-cleaned when it is turned reversely, which reduces the difficulty of cleaning.

[0005] Therefore, how to use a pot dryer to first remove moisture and other impurities from the raw materials, improve the purity of the raw materials, and then sinter them is an effective solution to solve the technical problem that when the raw materials in the rotary kiln are sintered, impurities will adhere to the inner wall of the rotary kiln cylinder, resulting in the difficulty of cleaning the inner wall of the rotary kiln cylinder, which is time-consuming and labor-intensive, and the production needs to be stopped during the cleaning process, affecting the production progress. Utility Model Content

[0006] To this end, the utility model provides a combined equipment of pot-type drying and rotary kiln sintering, which mainly solves the technical problem of the prior art that the thickness of the inner wall of the rotary kiln cylinder increases due to sediment during rotary kiln sintering, which requires regular cleaning, resulting in time-consuming and labor-intensive cleaning and affecting production progress.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A combined equipment of pot-type drying and rotary kiln sintering, comprising an operating table; a rotary kiln cylinder is rotatably provided on the top surface of the operating table; a feed cover is provided on one side of the rotary kiln cylinder, and a discharge cover is provided on the other side; a discharge port is provided at the bottom of the discharge cover; and at least two pot-type dryers and a chute are also provided; the pot-type dryer is located above the feed cover and is used to dry the material to be sintered; one end of the chute is connected to the discharge port of the pot-type dryer, and the other end passes through the feed cover and extends into the rotary kiln cylinder, and the material to be sintered slides into the rotary kiln cylinder through the chute; the operating table is also provided with a heating device and a driving device; the heating device is used to heat the rotary kiln cylinder; the driving device is used to drive the rotary kiln cylinder to rotate.

[0009] Optionally, the heating device includes a heating box shell arranged on the operating table; a heating box inner wall is arranged inside the heating box shell; the heating box inner wall is cylindrical and can be movably mounted on the outer side of the rotary kiln cylinder; a thermocouple is arranged at the lower part of the heating box inner wall; and insulation material is filled between the heating box shell and the heating box inner wall.

[0010] Preferably, it also includes a silo; a star-shaped discharge valve is provided at the bottom outlet of the silo; the end of the chute away from the rotary kiln cylinder is connected to the star-shaped discharge valve; the top of the silo is connected to the discharge port of the pot-type dryer, and is used to hold the material to be sintered dried by the pot-type dryer.

[0011] Preferably, it further comprises a drying rack; the kettle dryer is arranged on the drying rack; the drying rack is also provided with a discharge cylinder; the telescopic arm of the discharge cylinder is connected to the discharge valve of the kettle dryer to drive the discharge valve to open or close.

[0012] Preferably, the rotary kiln cylinder between the heating device and the discharge cover is provided with a cooling device for cooling the rotary kiln cylinder.

[0013] Optionally, the cooling device includes a cooling hood arranged on the operating table; the rotary kiln cylinder can move through the cooling hood; a cooling water pipe is provided on the top of the inner wall of the cooling hood; the cooling water pipe is provided with a plurality of nozzles for spraying water to cool the rotary kiln cylinder; a water inlet connected to the cooling water pipe is provided on the top of the cooling hood for injecting cooling water; a drain outlet is provided at the bottom of the cooling hood for discharging cooling water.

[0014] Preferably, an exhaust hole is provided on the top of the cooling cover for discharging water vapor during cooling.

[0015] Optionally, a second adjustment frame is hinged at the bottom of the operating table in the discharge cover area; a plurality of first adjustment frames are evenly distributed at the bottom of the operating table between the second adjustment frame and the feed cover; and the top surface of the first adjustment frame is threadedly connected to the bottom surface of the operating table through an adjusting screw.

[0016] The utility model has at least the following beneficial effects:

[0017] A rotary kiln cylinder is provided, a feed cover is provided on one side of the rotary kiln cylinder, a discharge cover is provided on the other side, at least two pot-type dryers and chute are provided, the pot-type dryer is located above the feed cover, one end of the chute is connected with the discharge port of the pot-type dryer, and the other end passes through the feed cover and extends into the rotary kiln cylinder, a heating device and a driving device are also provided, the heating device is used to heat the rotary kiln cylinder; the driving device is used to drive the rotary kiln cylinder to rotate.

[0018] 1. This application sets up two pot-type dryers, which can not only dry the materials to be sintered to remove moisture and tar before sintering, and avoid the accumulation of sediments on the inner wall of the rotary kiln cylinder caused by moisture and tar when the materials to be sintered are sintered in the rotary kiln cylinder, but also alternately perform drying and feeding operations, greatly improving the processing capacity and production efficiency.

[0019] 2. In this application, the material dried by the pot dryer directly enters the rotary kiln cylinder for sintering. The dried material has no cooling environment, which not only saves time and improves production efficiency, but also saves energy and has a high energy utilization rate.

[0020] It can be seen that the combined equipment of pot-type drying and rotary kiln sintering of the utility model has the advantages of avoiding the sticking of sediment on the inner wall of the rotary kiln cylinder, not requiring regular cleaning, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly explain the prior art and the present invention, the following briefly introduces the drawings required for describing the prior art and the present invention. Obviously, the drawings described below are only exemplary, and for ordinary technicians in this field, other drawings can be derived from the provided drawings without creative work.

[0022] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them. They are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportion or adjustment of size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0023] Figure 1It is a front view of a combined device of pot-type drying and rotary kiln sintering of the utility model;

[0024] Figure 2 It is a front cross-sectional view of a combined device of pot-type drying and rotary kiln sintering of the utility model;

[0025] Figure 3 It is a top view of a combined equipment of pot type drying and rotary kiln sintering of the utility model;

[0026] Figure 4 It is a left view of a combined device of pot-type drying and rotary kiln sintering of the utility model;

[0027] Figure 5 It is a side view of a driving device of a combined equipment of pot-type drying and rotary kiln sintering of the utility model;

[0028] Description of reference numerals:

[0029] 1. Operation table; 2. Rotary kiln cylinder; 3. Pot dryer; 4. Heating device; 401. Heating box shell; 402. Heating box inner wall; 403. Insulation material; 404. Thermocouple; 5. Cooling device; 501. Cooling cover; 502. Water inlet; 503. Cooling water pipe; 504. Nozzle; 505. Exhaust hole; 506. Drainage outlet; 6. Feed cover; 7. Discharge cover; 8. Discharge outlet; 9. Driving device; 901 , cylinder sprocket; 902, driving sprocket; 903, motor; 904, chain; 10, first adjusting frame; 11, adjusting screw; 12, second adjusting frame; 13, silo; 14, star-shaped unloading valve; 15, rotating connecting device; 1501, rolling ring; 1502, supporting wheel; 1503, blocking wheel; 1504, dust hood; 16, sealing device; 17, drying rack; 18, slide pipe; 19, hood slide rail; 20, unloading cylinder. DETAILED DESCRIPTION

[0030] The present application is further described below in detail through specific embodiments in conjunction with the accompanying drawings.

[0031] In the description of this application: unless otherwise specified, the meaning of "plurality" is two or more. The terms "first", "second", "third", etc. in this application are intended to distinguish the objects referred to, and do not have special meanings in terms of technical connotations (for example, they should not be understood as emphasizing the importance or order, etc.). Expressions such as "including", "comprising", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).

[0032] The terms such as "upper", "lower", "left", "right", "middle", etc. used in this application are usually used to facilitate intuitive understanding by comparing with the accompanying drawings, and are not absolute limitations on the positional relationship in the actual product. Without departing from the technical concept disclosed in this application, changes in these relative positional relationships should also be regarded as the scope of this application.

[0033] The utility model is a combined equipment of pot type drying and rotary kiln sintering, such as Figures 1 to 5As shown, an operating table 1 is provided, and a rotary kiln cylinder 2 is rotatably provided on the top surface of the operating table 1. Specifically, the rotatable connection can adopt a rotary connection device 15 of a rotary kiln in the prior art, that is, a rolling ring 1501 is sleeved on the outer wall of the rotary kiln cylinder 2. A pair of freely rotatable supporting wheels 1502 are arranged on the operating table 1 at the position corresponding to the rolling ring 1501. The pair of supporting wheels 1502 are respectively located at the front and rear positions of the rotating direction of the rolling ring 1501. The pair of supporting wheels 1502 support the rolling ring 1501, and the rolling ring 1501 can roll and rotate on the supporting wheels 1502. At the same time, a blocking wheel 1504 is arranged on one side of the supporting wheel 1502 to block when the rotary kiln cylinder 2 is tilted to prevent the rotary kiln cylinder 2 from shifting. Under normal circumstances, in order to protect the rotating connection device 15 and prevent dust, a dust cover 1504 is also covered outside the rolling ring 1501, the supporting wheel 1502, and the blocking wheel 1503. This is a prior art well known to those skilled in the art and will not be described in detail here. A feed cover 6 is arranged on one side of the rotary kiln cylinder 2, and a discharge cover 7 is arranged on the other side. The feed cover 6 and the discharge cover 7 also adopt the feed and discharge covers of the rotary kiln in the prior art. Its structure is well known to those skilled in the art and will not be described in detail here. In addition, in order to seal the feed cover 6 and the discharge cover 7, a sealing device 16 is installed between the feed cover 6 and the rotary kiln cylinder 2, and between the discharge cover 7 and the rotary kiln cylinder 2. The sealing device 16 also adopts the sealing device of the feed cover and the discharge cover of the current rotary kiln, and its structure is also well known to those skilled in the art, and will not be described in detail here. A discharge port 8 is provided at the bottom of the discharge cover 7, and the sintered material is discharged from the discharge port 8. Before sintering the material to be sintered, in order to dry the material to be sintered to remove moisture therein and prevent impurities such as tar generated during the sintering process from adhering to the inner wall of the rotary kiln cylinder, a drying device is also provided to dry the material to be sintered. The drying device may be a pot-type dryer currently available on the market. The embodiment of the present application selects a pot-type vacuum dryer, which comprises a pot-shaped pot body, the side wall of the pot body being composed of an outer wall and an inner wall, the outer wall and the inner wall being filled with heating oil to heat the material in the pot body, a stirring paddle is provided in the pot body, and the stirring paddle can rotate slowly in the forward direction under the drive of a stirring motor outside the pot body to stir the material so that the material is heated evenly, and at the same time, the stirring paddle can rotate in the reverse direction at a high speed to scrape off the material sticking to the inner wall of the pot body and clean up the sticky material in time. The pot-type dryer is a prior art product, and its detailed structure and working principle are not described here. The present application sets at least two pot-type dryers 3, one of which can be used for feeding after drying, while the other one is used for drying, so that the present application equipment can perform sintering without stopping, greatly improving production efficiency; at the same time, when one pot-type dryer 3 is overhauled, it will not affect the normal operation of the present application equipment. Both pot-type dryers 3 are located above the discharge cover 7.A chute 18 is also provided, one end of which is connected to the discharge port of the pot-type dryer 3. Specifically, a hose can be used to connect the discharge port of the pot-type dryer 3 and the chute 18. The other end of the chute 18 passes through the feed cover 6 and extends into the rotary kiln cylinder 2. The sintered material slides into the rotary kiln cylinder 2 through the chute 18. The operating table 1 is also provided with a heating device 4 and a driving device 9. The heating device 4 is used to heat the rotary kiln cylinder 2. The driving device 9 is used to drive the rotary kiln cylinder 2 to rotate. The driving device 9 can use the rotary driving device of the rotary kiln in the prior art, that is, a cylinder sprocket 901 is sleeved on the outer wall of the rotary kiln cylinder 2, and a motor 903 is provided on the operating table 1. A driving sprocket 902 is provided on the output shaft of the motor 903. The driving sprocket 902 is connected to the cylinder sprocket 901 through a chain 904. The cylinder sprocket 901 is driven to rotate, driving the rotary kiln cylinder 2 to rotate.

[0034] Optionally, the embodiment of the present application provides a preferred implementation of the heating device, specifically: the heating device 4 includes a heating box shell 401 arranged on the operating table 1, and a heating box inner wall 402 is provided in the heating box shell 401. The heating box inner wall 402 is cylindrical and can be movably mounted on the outer side of the rotary kiln cylinder 2. A thermocouple 404 is provided at the lower part of the heating box inner wall 402, and a heat-insulating material 403 is filled between the heating box shell 401 and the heating box inner wall 402.

[0035] Preferably, in order to further improve production efficiency and the processing capacity of the kettle dryer 3, a silo 13 is also included. After the dried material to be sintered by the kettle dryer 3 is discharged into the silo 13, the next round of drying operation can be carried out. A star-shaped discharge valve 14 is provided at the bottom outlet of the silo 13. The end of the chute 18 away from the rotary kiln cylinder 2 is connected to the star-shaped discharge valve 14, and they can be connected by a hose. The top of the silo 13 is connected to the discharge port of the kettle dryer 3, and they can also be connected by a hose.

[0036] Preferably, a drying rack 17 is further included, and the kettle dryer 3 is arranged on the drying rack 17. Since the discharge valve of the kettle dryer 3 is a baffle arranged at the discharge port of the kettle dryer 3, the discharge port of the kettle dryer 3 is opened or closed by pulling the baffle, therefore, a discharge cylinder 20 is also provided on the drying rack 17, and the telescopic arm of the discharge cylinder 20 is connected to the discharge valve of the kettle dryer 3, that is, connected to the baffle, to drive the discharge valve to be opened or closed.

[0037] Preferably, for materials that need to be discharged at room temperature after sintering, they need to be cooled after sintering. It takes time to cool down the high-temperature materials after sintering, which will also affect the production efficiency. For this reason, a cooling device 5 is provided on the rotary kiln cylinder 2 between the heating device 4 and the discharge cover 7, which is used to cool the rotary kiln cylinder 2, so that the high-temperature materials after sintering can be quickly cooled and discharged.

[0038] Optionally, the embodiment of the present application provides a preferred implementation of the cooling device 5, specifically: the cooling device 5 includes a cooling hood 501 arranged on the operating table 1, the rotary kiln cylinder 2 can move through the cooling hood 501, a cooling water pipe 503 is provided on the top of the inner wall of the cooling hood 501, the cooling water pipe 503 is provided with a plurality of nozzles 504, which are used to spray water to cool the rotary kiln cylinder 2, and a water inlet 502 connected to the cooling water pipe 503 is provided on the top of the cooling hood 501 for injecting cooling water; a drain outlet 506 is provided at the bottom of the cooling hood 501 for discharging cooling water.

[0039] Preferably, in order to facilitate the discharge of water vapor during spray cooling from the cooling cover 501, an exhaust hole 505 is provided on the top of the cooling cover 501 for discharging water vapor during cooling.

[0040] Optionally, in order to enable the material to automatically move forward for continuous production when the rotary kiln cylinder 2 rotates, the rotary kiln cylinder 2 is generally arranged to be inclined. For this purpose, a second adjusting frame 12 is hinged at the bottom of the operating table 1 in the discharge cover 7 area, and a plurality of first adjusting frames 10 are evenly distributed at the bottom of the operating table 1 between the second adjusting frame 12 and the feed cover 6. The top surface of the first adjusting frame 10 is threadedly connected to the bottom surface of the operating table 1 through an adjusting screw 11. In this way, the inclination of the operating table 1 is adjusted by rotating the adjusting screw 11 to tilt the rotary kiln cylinder 2.

[0041] The working principle of the rotary kiln equipment in this application is:

[0042] The pot dryer dries the material to be sintered and removes moisture and tar substances; the discharge cylinder is started, the discharge valve is opened, the dried material flows into the silo, and the pot dryer performs the next round of drying; the star-shaped discharge valve is opened, and the dried material falls into the rotary kiln cylinder through the chute; the material to be sintered is sintered under the heating of the heating device; the material to be sintered slides forward on the inner wall of the rotary kiln cylinder under the rotation of the inclined rotary kiln cylinder to complete the sintering; the sintered material enters the cooling device section of the rotary kiln cylinder, and the nozzle sprays water to cool the rotary kiln cylinder. The high-temperature sintered material in the rotary kiln cylinder is quickly cooled down and then discharged from the discharge port.

[0043] The above is a relatively specific and detailed description of the present application through general description and specific embodiments. It should be understood that, based on the technical concept of the present application, several conventional adjustments or further innovations can be made to these specific embodiments; however, as long as they do not deviate from the technical concept of the present application, the technical solutions obtained by these conventional adjustments or further innovations also fall within the scope of protection of the claims of the present application.

Claims

1. A combined equipment of pot drying and rotary kiln sintering, comprising an operating table (1); a rotary kiln cylinder (2) is rotatably provided on the top surface of the operating table (1); a feed cover (6) is provided on one side of the rotary kiln cylinder (2), and a discharge cover (7) is provided on the other side; a discharge port (8) is provided at the bottom of the discharge cover (7), characterized in that: It also includes at least two pot-type dryers (3) and a chute (18); the pot-type dryer (3) is located above the feed cover (6) and is used to dry the material to be sintered; one end of the chute (18) is connected to the discharge port of the pot-type dryer (3), and the other end passes through the feed cover (6) and extends into the rotary kiln cylinder (2), and the material to be sintered slides into the rotary kiln cylinder (2) through the chute (18); the operating table (1) is also provided with a heating device (4) and a driving device (9); the heating device (4) is used to heat the rotary kiln cylinder (2); the driving device (9) is used to drive the rotary kiln cylinder (2) to rotate.

2. A combined equipment of pot drying and rotary kiln sintering according to claim 1, characterized in that: The heating device (4) comprises a heating box shell (401) arranged on the operating table (1); a heating box inner wall (402) is arranged inside the heating box shell (401); the heating box inner wall (402) is cylindrical and can be movably mounted on the outer side of the rotary kiln cylinder (2); a thermocouple (404) is arranged at the lower part of the heating box inner wall (402); and a heat-insulating material (403) is filled between the heating box shell (401) and the heating box inner wall (402).

3. The combined equipment of pot drying and rotary kiln sintering according to claim 1, characterized in that: It also includes a silo (13); a star-shaped discharge valve (14) is provided at the bottom outlet of the silo (13); the end of the chute (18) away from the rotary kiln cylinder (2) is connected to the star-shaped discharge valve (14); the top of the silo (13) is connected to the discharge port of the pot-type dryer (3) for containing the material to be sintered that has been dried by the pot-type dryer (3).

4. A combined equipment of pot drying and rotary kiln sintering according to claim 3, characterized in that: It also comprises a drying rack (17); the pot-type dryer (3) is arranged on the drying rack (17); the drying rack (17) is also provided with a discharge cylinder (20); the telescopic arm of the discharge cylinder (20) is connected to the discharge valve of the pot-type dryer (3) to drive the discharge valve to open or close.

5. A combined equipment of pot drying and rotary kiln sintering according to any one of claims 1 to 4, characterized in that: The rotary kiln cylinder (2) between the heating device (4) and the discharge cover (7) is provided with a cooling device (5) for cooling the rotary kiln cylinder (2).

6. A combined equipment of pot drying and rotary kiln sintering according to claim 5, characterized in that: The cooling device (5) comprises a cooling hood (501) arranged on the operating table (1); the rotary kiln shell (2) can movably pass through the cooling hood (501); a cooling water pipe (503) is provided at the top of the inner wall of the cooling hood (501); the cooling water pipe (503) is provided with a plurality of nozzles (504) for spraying water on the rotary kiln shell (2) for cooling; a water inlet (502) connected to the cooling water pipe (503) is provided at the top of the cooling hood (501) for injecting cooling water; and a drain outlet (506) is provided at the bottom of the cooling hood (501) for discharging cooling water.

7. A combined equipment of pot drying and rotary kiln sintering according to claim 6, characterized in that: The top of the cooling cover (501) is provided with an exhaust hole (505) for exhausting water vapor during cooling.

8. According to the combined equipment of pot-type drying and rotary kiln sintering as described in claim 6, the bottom of the operating table (1) in the discharge cover (7) area is hinged with a second adjustment frame (12); a plurality of first adjustment frames (10) are evenly distributed on the bottom of the operating table (1) between the second adjustment frame (12) and the feed cover (6); the top surface of the first adjustment frame (10) is threadedly connected to the bottom surface of the operating table (1) through an adjusting screw (11).

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