An internal and external circulation segmented rotary cooling system

Abstract

The present invention discloses an internal and external circulation segmented rotary cooling system, comprising a cylinder, wherein a low-temperature cooling pipeline, a high-temperature cooling pipeline, and a distribution ring pipe are provided inside the cylinder, wherein the water inlet of the low-temperature cooling pipeline is connected to the distribution ring pipe, and the water outlet of the low-temperature cooling pipeline extends to the middle of the cylinder, and the high-temperature cooling pipeline comprises a first straight pipe section, a second straight pipe section, and a U-shaped bend section, wherein the water inlet of the first straight pipe section is connected to the distribution ring pipe, the water outlet of the first straight pipe section extends to the feed end of the cylinder and is connected to the water inlet of the second straight pipe section through the U-shaped bend section, and the water outlet of the second straight pipe section extends to the middle of the cylinder; a low-temperature ring pipe, a high-temperature ring pipe, and a spray pipe are provided outside the cylinder, wherein the low-temperature ring pipe is connected to the low-temperature cooling pipeline, the high-temperature ring pipe is connected to the second straight pipe section, and the spray pipe is connected to the low-temperature ring pipe and the high-temperature ring pipe; a water reservoir is provided below the cylinder, and the water reservoir is connected to the central pipe via a water pump. The present invention greatly improves the cooling efficiency of the cooling kiln and eliminates the cooling tower system.

Description

Technical Field

[0001] The invention relates to a rotary cooling kiln, in particular to an internal and external circulation segmented rotary cooling system. Background Art

[0002] Currently, national policies are vigorously supporting the development of new energy vehicles. As an anode material for new energy batteries, lithium carbonate has a promising market prospect. The raw materials used to prepare lithium carbonate are calcined at high temperatures reaching 800°C. To meet subsequent production and processing needs, the material needs to be rapidly cooled after calcination in a rotary kiln. Generally, companies use single-drum rotary cooling kilns for this purpose.

[0003] At present, most manufacturers use single-drum rotary cooling kilns, which generally adopt external water spray cooling. This cooling method has low cooling efficiency. A few companies have also tried to use the cooling method of arranging cooling water pipes inside the cooling kiln. This cooling method requires an additional cooling water tower system. Summary of the Invention

[0004] Purpose of the invention: The purpose of the present invention is to provide an internal and external circulation segmented rotary cooling system, which greatly improves the cooling efficiency of the cooling kiln, eliminates the external cooling tower system for circulating cooling water, reduces production costs, and improves production stability.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An internal and external circulation segmented rotary cooling system includes a cylinder, a transmission device, a support device, a feeding device, and a discharging device. The cylinder is tilted, the support device is used to support the cylinder, the transmission device is used to drive the cylinder to rotate around its own axis, the feeding device is arranged at the feeding end of the cylinder, and is used to feed high-temperature materials into the cylinder, and the discharging device is arranged at the discharging end of the cylinder, and is used to collect the cooled materials. The system is characterized by:

[0007] A low-temperature section cooling pipeline, a high-temperature section cooling pipeline, and a distribution ring pipe are respectively provided inside the cylinder. The distribution ring pipe is coaxially arranged at the discharge end of the cylinder. A central connecting pipe is provided in the center of the distribution ring pipe. The central connecting pipe and the distribution ring pipe are connected through a number of distribution branches. Several low-temperature section cooling pipelines and high-temperature section cooling pipelines are arranged axially along the cylinder. The water inlet end of the low-temperature section cooling pipeline is connected to the distribution ring pipe, and the water outlet end of the low-temperature section cooling pipeline extends to the middle part of the cylinder. The high-temperature section cooling pipeline includes a first straight pipe section, a second straight pipe section, and a U-shaped bend section. The water inlet end of the first straight pipe section is connected to the distribution ring pipe, the water outlet end of the first straight pipe section extends to the feed end of the cylinder and is connected to the water inlet end of the second straight pipe section through the U-shaped bend section, and the water outlet end of the second straight pipe section extends to the middle part of the cylinder.

[0008] A low-temperature section ring pipe, a high-temperature section ring pipe, and a spray pipeline are provided on the outside of the cylinder. The low-temperature section ring pipe is coaxially arranged in the middle of the cylinder and at a position corresponding to the water outlet end of the low-temperature section cooling pipeline. The low-temperature section ring pipe and the water outlet end of the low-temperature section cooling pipeline are connected through a number of low-temperature section pipes. The high-temperature section ring pipe is coaxially arranged in the middle of the cylinder and at a position corresponding to the water outlet end of the second straight pipe section. The high-temperature section ring pipe and the water outlet end of the second straight pipe section are connected through a number of high-temperature section pipes. The low-temperature section of the spray pipeline is connected to the low-temperature section ring pipe, and the high-temperature section of the spray pipeline is connected to the high-temperature section ring pipe.

[0009] A water reservoir is provided under the cylinder, the water reservoir is provided with a water pump, the water pump is connected to a water inlet pipe, and the water inlet pipe is connected to the central pipe through a rotary joint.

[0010] Furthermore, the rotary joint includes shell one and shell two, shell one and shell two have a mounting hole one and a spherical cavity that are interconnected, mounting hole one is adapted to the center connecting pipe, a freely rotatable rotating sphere is provided in the spherical cavity, the rotating sphere is provided with a mounting hole two that is adapted to the water inlet pipe, and the center connecting pipe installed in the mounting hole one is interconnected with the water inlet pipe installed in the mounting hole two.

[0011] Furthermore, a sealing member is provided on the inner surface of the spherical cavity, and the sealing member abuts against the surface of the rotating sphere.

[0012] Furthermore, a plurality of spray pipelines are provided around the periphery of the cylinder, each spray pipeline is arranged along the axial direction of the cylinder, and a plurality of nozzles facing the outer surface of the cylinder are arranged at equal intervals on the spray pipeline.

[0013] Furthermore, a blowing nozzle is provided on the side of the cylinder, and the blowing nozzle is connected to the air cooler.

[0014] Furthermore, the support device is arranged on both sides of the spray pipeline, and the support device and the spray pipeline are spaced a certain distance apart. A water retaining ring is provided on the outer surface of the cylinder at the spacing position between the support device and the spray pipeline.

[0015] Furthermore, a spray protection cover is provided on the outside of the spray pipeline, and a water flow hole is opened at the bottom of the spray protection cover.

[0016] Furthermore, the discharging device includes a discharging cover outside the discharging end of the sleeve cylinder, a discharge port is provided at the bottom of the discharging cover, and a water inlet pipe mounting seat is provided on the side of the discharging cover.

[0017] Furthermore, a material lifting plate is provided on the inner wall of the cylinder.

[0018] Beneficial effects:

[0019] 1) The present invention adopts a segmented cooling method. Due to the long length of the single-drum cooling kiln, the material is cooled from high-temperature feed 800°C to 120°C discharge. According to the characteristics of the temperature difference bandwidth, high-temperature cooling pipelines and low-temperature cooling pipelines are set. The high-temperature cooling section quickly cools down, and the low-temperature cooling section meets the requirements of low-temperature discharge.

[0020] 2) The present invention adopts a method of cooling by water-cooling pipes inside the cylinder and external spray cooling. The internal water-cooling pipes are in direct contact with the material, and the cooling efficiency is high. The spray water of the external spray pipe is in full contact with the outside of the cylinder, and the cooling area is large. The principle of evaporation heat is used to quickly cool the cylinder. At the same time, an environmental fan can be set in the radial direction of the cylinder to enhance the spray cooling effect. After the spray water is cooled by the environment, it can enter the low-temperature section again to achieve circulating cooling. At the same time, it solves the problem of multiple cooling water pipes in the cylinder leading to multiple leakage points, large wear and maintenance, and increased equipment weight due to the increase in cooling water pipes;

[0021] 3) Compared with the existing rotary kiln built-in pipe cooling method, the present invention solves the problem of circulating water entering the cooling kiln from the low-temperature side, passing through the high-temperature side, and then returning to the low-temperature side, which reduces cooling efficiency. At the same time, it eliminates the need for an additional cooling tower system in the rotary kiln built-in pipe cooling method. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention.

[0023] Figure 2 Schematic diagram of the distribution ring pipe structure.

[0024] Figure 3 This is a structural diagram of the high-temperature section cooling pipeline.

[0025] Figure 4 This is a schematic diagram of the connection between the low-temperature section ring pipe and the low-temperature section cooling pipeline.

[0026] Figure 5 This is a schematic diagram of the connection between the high-temperature section ring pipe and the high-temperature section cooling pipeline.

[0027] Figure 6 It is a structural diagram of the rotary joint.

[0028] Figure 7 It is a structural diagram of the spray pipe and blowing nozzle.

[0029] In the figure: 1-feeding device, 2-cylinder, 3-high temperature section cooling pipeline, 3-1-first straight pipe section, 3-2-second straight pipe section, 3-3-U-shaped bend section, 4-support device, 5-water retaining ring, 6-high temperature section of spray pipeline; 7-high temperature section ring pipe, 8-low temperature section ring pipe, 9-low temperature section of spray pipeline, 10-low temperature section cooling pipeline, 11-transmission device, 12-drive motor, 13-distribution ring pipe, 14-discharging device, 15-rotating joint, 15-1-shell one, 15-2-shell two, 15-3-mounting hole one, 15-4-spherical cavity, 15-5-rotating sphere, 15-6-seal, 16-water reservoir, 17-water pump, 18-water inlet pipe, 19-center pipe, 20-distribution branch pipe, 21-low temperature section pipe; 22-high temperature section pipe; 23-air cooler; 24-blowing nozzle. DETAILED DESCRIPTION

[0030] The present invention will be further explained below with reference to the accompanying drawings.

[0031] like Figure 1 As shown, an internal and external circulation segmented rotary cooling system of the present invention includes a cylinder 2, a transmission device 11, a support device 4, a feeding device 1, and a discharging device 14. The cylinder 2 is tilted, and the support device 4 is used to support the cylinder 2. The support device 4 includes a bearing seat and a rotary support bearing installed on the bearing seat. The cylinder 2 is sleeved in the bearing hole of the rotary support bearing. The transmission device 11 is used to drive the cylinder 2 to rotate around its own axis. The transmission device 11 includes a drive motor 12. The drive motor 12 is connected to the cylinder 2 through a gear transmission structure or a belt transmission structure. The feeding device 1 is arranged at the feeding end of the cylinder. The feeding device 1 includes a feed hopper for feeding high-temperature materials into the cylinder. The discharging device 14 is arranged at the discharging end of the cylinder 2 for collecting cooled materials. The discharging device 14 includes a discharging hood mounted on the outside of the discharging end of the cylinder 2. The bottom of the hood is provided with a discharge port, and the side of the discharging hood is provided with a water inlet pipe mounting seat.

[0032] like Figure 2 and 3As shown, the cylinder 2 is provided with a low-temperature cooling pipeline 10, a high-temperature cooling pipeline 3, and a distribution ring pipe 13. The distribution ring pipe 13 is coaxially arranged at the discharge end of the cylinder 2. A central pipe 19 is provided at the center of the distribution ring pipe 13. The central pipe 19 is connected to the distribution ring pipe 13 through a number of distribution branches 20. Several low-temperature cooling pipelines 10 and high-temperature cooling pipelines 3 are arranged axially along the cylinder 2. The water inlet end of the low-temperature cooling pipeline 10 is connected to the distribution ring pipe 13. Pipe 13, the water outlet end of the low-temperature section cooling pipeline 10 extends to the middle of the cylinder 2, and the high-temperature section cooling pipeline 3 includes a first straight pipe section 3-1, a second straight pipe section 3-2, and a U-shaped bend section 3-3. The water inlet end of the first straight pipe section 3-1 is connected to the distribution ring pipe 13, and the water outlet end of the first straight pipe section 3-1 extends to the feed end of the cylinder 2 and is connected to the water inlet end of the second straight pipe section 3-2 through the U-shaped bend section 3-3. The water outlet end of the second straight pipe section 3-2 extends to the middle of the cylinder 2.

[0033] In the present invention, a material lifting plate (not shown in the figure) is provided on the inner wall of the cylinder 2 to help increase the contact area between the material, the cooling pipeline and the cylinder.

[0034] like Figure 4 and 5 As shown, a low-temperature section ring pipe 8, a high-temperature section ring pipe 7, and a spray pipeline are provided on the outside of the cylinder. The low-temperature section ring pipe 8 is coaxially arranged in the middle of the cylinder 2 and at a position corresponding to the water outlet end of the low-temperature section cooling pipeline 10. The low-temperature section ring pipe 8 is connected to the water outlet end of the low-temperature section cooling pipeline 10 through a number of low-temperature section pipes 21. The high-temperature section ring pipe 7 is coaxially arranged in the middle of the cylinder 2 and at a position corresponding to the water outlet end of the second straight pipe section 3-2. The high-temperature section ring pipe 7 is connected to the water outlet end of the second straight pipe section 3-2 through a number of high-temperature section pipes 22. The low-temperature section 9 of the spray pipeline is connected to the low-temperature section ring pipe 8, and the high-temperature section 6 of the spray pipeline is connected to the high-temperature section ring pipe 7.

[0035] like Figure 7 As shown, in the present invention, a plurality of spray pipes are arranged around the periphery of the cylinder 2, each of which is arranged axially along the cylinder. Multiple nozzles facing the outer surface of the cylinder 2 are arranged at equal intervals on the spray pipes. To enhance the spray cooling effect, a blowing nozzle 24 is provided on the outside of the cylinder. The blowing nozzle 24 is connected to the air cooler 23, and a cooling air flow is sprayed toward the cylinder through the blowing nozzle 24, accelerating the cooling of the cylinder and the spray water.

[0036] The support device 4 is arranged on both sides of the spray pipeline, and the support device 4 is spaced a certain distance from the spray pipeline. A water retaining ring 5 is provided on the outer surface of the cylinder 2 at the spacing position between the support device and the spray pipeline.

[0037] In addition, according to environmental requirements, a spray protection cover is provided on the outside of the spray pipe, and a water flow hole is opened at the bottom of the spray protection cover.

[0038] A water reservoir 16 is provided below the cylinder 2 , and the water reservoir 16 is provided with a water pump 17 . The water pump 17 is connected to a water inlet pipe 18 , and the water inlet pipe 18 is connected to a central pipe 19 through a rotary joint 15 .

[0039] like Figure 6 As shown, the rotary joint 15 includes a shell 15-1 and a shell 2 15-2. The shell 15-1 and the shell 2 15-2 have a mounting hole 15-3 and a spherical cavity 15-4 that are interconnected. The mounting hole 15-1 is adapted to the center pipe 19. A freely rotatable rotating sphere 15-5 is provided in the spherical cavity 15-4. The rotating sphere 15-5 is provided with a mounting hole 2 that is adapted to the water inlet pipe 18. The center pipe 19 installed in the mounting hole 15-3 is interconnected with the water inlet pipe 18 installed in the mounting hole 2. In order to ensure the sealing effect of the rotary joint 15, a seal 15-6 is provided on the inner surface of the spherical cavity 15-4, and the seal 15-6 abuts against the surface of the rotating sphere 15-5. The rotary joint uses the principle of 360° rotation of the sphere to effectively separate the rotary motion of the cylinder from the static state of the water inlet pipe. The good sealing of the spherical surface effectively solves the problem of sealing failure caused by the jumping and swinging of the rotating cylinder.

[0040] When the internal and external circulation segmented rotary cooling system of the present invention is working, the water in the water reservoir is pumped out by the water pump, enters the interior of the cylinder through the rotary joint, and is distributed to the high-temperature cooling pipeline and the low-temperature cooling pipeline through the distribution ring pipe. Heat exchange is achieved with the material inside the cylinder through the high-temperature cooling pipeline and the low-temperature cooling pipeline, and then passes into the low-temperature ring pipe and the high-temperature ring pipe to enter the spray pipeline, and then is sprayed to the surface of the cylinder and finally falls into the water reservoir.

[0041] The cooling water system of this invention is a relatively closed-loop cooling system. Water from the reservoir is pumped into the cooling kiln for internal cooling and external spraying, after which the cooling water returns to the reservoir. Internal and external cooling pipes rotate with the kiln, allowing for multi-point external spraying.

[0042] Compared to existing rotary kiln external spray cooling methods, this invention utilizes cooling water pipes to first contact the high-temperature material inside before spraying it down, significantly improving cooling efficiency. Furthermore, due to limitations in the kiln's transmission and support systems, the existing spray cooling section is located between the kiln's two support sections, resulting in a relatively short cooling length for the kiln's cylinder. This invention utilizes internal cooling pipes to significantly increase this cooling length, achieving rapid cooling of the high-temperature section and effective cooling of the low-temperature section.

[0043] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An internal and external circulation segmented rotary cooling system, comprising a cylinder, a transmission device, a support device, a feeding device, and a discharging device. The cylinder is arranged at an angle, the support device is used to support the cylinder, the transmission device is used to drive the cylinder to rotate around its own axis, the feeding device is arranged at the feeding end of the cylinder, and is used to feed high-temperature materials into the cylinder, and the discharging device is arranged at the discharging end of the cylinder, and is used to collect the cooled materials. The system is characterized by: A low-temperature section cooling pipeline, a high-temperature section cooling pipeline, and a distribution ring pipe are respectively provided inside the cylinder. The distribution ring pipe is coaxially arranged at the discharge end of the cylinder. A central connecting pipe is provided in the center of the distribution ring pipe. The central connecting pipe and the distribution ring pipe are connected through a number of distribution branches. Several low-temperature section cooling pipelines and high-temperature section cooling pipelines are arranged axially along the cylinder. The water inlet end of the low-temperature section cooling pipeline is connected to the distribution ring pipe, and the water outlet end of the low-temperature section cooling pipeline extends to the middle part of the cylinder. The high-temperature section cooling pipeline includes a first straight pipe section, a second straight pipe section, and a U-shaped bend section. The water inlet end of the first straight pipe section is connected to the distribution ring pipe, the water outlet end of the first straight pipe section extends to the feed end of the cylinder and is connected to the water inlet end of the second straight pipe section through the U-shaped bend section, and the water outlet end of the second straight pipe section extends to the middle part of the cylinder. A low-temperature section ring pipe, a high-temperature section ring pipe, and a spray pipeline are provided on the outside of the cylinder. The low-temperature section ring pipe is coaxially arranged in the middle of the cylinder and at a position corresponding to the water outlet end of the low-temperature section cooling pipeline. The low-temperature section ring pipe and the water outlet end of the low-temperature section cooling pipeline are connected through a number of low-temperature section pipes. The high-temperature section ring pipe is coaxially arranged in the middle of the cylinder and at a position corresponding to the water outlet end of the second straight pipe section. The high-temperature section ring pipe and the water outlet end of the second straight pipe section are connected through a number of high-temperature section pipes. The low-temperature section of the spray pipeline is connected to the low-temperature section ring pipe, and the high-temperature section of the spray pipeline is connected to the high-temperature section ring pipe. A water reservoir is provided under the cylinder, the water reservoir is provided with a water pump, the water pump is connected to a water inlet pipe, and the water inlet pipe is connected to the central pipe through a rotary joint.

2. The internal and external circulation segmented rotary cooling system according to claim 1, characterized in that: The rotary joint includes a shell 1 and a shell 2. The shell 1 and the shell 2 have a mounting hole 1 and a spherical cavity that are connected to each other. The mounting hole 1 is adapted to the center pipe. A freely rotatable rotating sphere is provided in the spherical cavity. The rotating sphere is provided with a mounting hole 2 that is adapted to the water inlet pipe. The center pipe installed in the mounting hole 1 is connected to the water inlet pipe installed in the mounting hole 2.

3. The internal and external circulation segmented rotary cooling system according to claim 2, characterized in that: A sealing member is provided on the inner surface of the spherical cavity, and the sealing member abuts against the surface of the rotating sphere.

4. The internal and external circulation segmented rotary cooling system according to claim 1, characterized in that: A plurality of spray pipelines are arranged around the periphery of the cylinder, each spray pipeline is arranged along the axial direction of the cylinder, and a plurality of nozzles facing the outer surface of the cylinder are arranged at equal intervals on the spray pipeline.

5. The internal and external circulation segmented rotary cooling system according to claim 1, characterized in that: An air blowing nozzle is arranged on the outside of the cylinder, and the air blowing nozzle is connected to an air cooler.

6. The internal and external circulation segmented rotary cooling system according to claim 5, characterized in that: The support device is arranged on both sides of the spray pipeline, and the support device and the spray pipeline are spaced a certain distance apart. A water retaining ring is provided on the outer surface of the cylinder at the spacing position between the support device and the spray pipeline.

7. The internal and external circulation segmented rotary cooling system according to claim 6, characterized in that: A spray protection cover is provided on the outside of the spray pipeline, and a water flow hole is opened at the bottom of the spray protection cover.

8. The internal and external circulation segmented rotary cooling system according to claim 1, characterized in that: The discharging device comprises a discharging cover outside the discharging end of the sleeve cylinder, a discharge port is provided at the bottom of the cover, and a water inlet pipe mounting seat is provided on the side of the discharging cover.

9. The internal and external circulation segmented rotary cooling system according to claim 1, characterized in that: The inner wall of the cylinder is provided with a material lifting plate.

Images