A screw cooling conveyor for a high temperature rotary kiln

Abstract

The utility model discloses a spiral cooling conveyor of high temperature rotary kiln relates to powder heat treatment equipment technical field, including cooling casing and spiral axis, the cooling casing is double -walled jacket structure, and the wall body forms the outside interlayer pipe cooling water space in it, the spiral axis is across in the inside of cooling casing, the spiral axis is composed by hollow shaft and continuous spiral blade, and the hollow shaft inside forms the screw rod inside cooling water space, and is equipped with the screw rod inside cooling water inlet and screw rod inside cooling water outlet who communicates with this space, the cooling casing still is equipped with feed inlet and discharge gate, the spiral blade and cooling casing inner wall surround and form the material space. The utility model discloses through setting up cooling casing jacket cooling water space and spiral axis inside cooling water channel combination, form inside and outside double -deck cooling system, has enhanced the cooling efficiency and heat exchange area significantly, can reduce the temperature of high temperature material from rotary kiln discharge fast, prevents equipment overheating damage.

Description

Technical Field

[0001] This utility model relates to the technical field of powder heat treatment equipment, specifically to a spiral cooling conveyor for a high-temperature rotary kiln. Background Technology

[0002] In the production processes of industries such as metallurgy, chemicals, and building materials, high-temperature rotary kilns are an important heat treatment equipment used for high-temperature processing such as roasting and calcination of materials. After being treated at high temperatures in the rotary kiln, the temperature of the materials exiting the kiln is usually as high as 300-800℃. They need to be cooled before they can be processed or packaged and stored. The cooling process of high-temperature powder is an important production link, which not only affects product quality but also directly affects production energy consumption and equipment operating costs.

[0003] Traditional natural cooling methods are inefficient, require a large area, and are prone to dust pollution. While water cooling is more efficient, it can cause powder to clump together, affecting product quality. In addition, it consumes a lot of water and creates wastewater treatment problems.

[0004] Currently, common powder cooling equipment on the market includes vibratory coolers, drum coolers, and fluidized bed coolers. However, these devices all have certain limitations. Vibratory coolers are prone to grading when processing powders, affecting the uniformity of the material. Drum coolers are bulky and occupy a large area. Fluidized bed coolers have high energy consumption and strict requirements on the particle size of the material. Especially in the fields of chemical engineering and new materials, many powdery materials have strict requirements for temperature control during the cooling process to avoid the impact of overheating or uneven cooling on product performance. In addition, the increasing environmental protection requirements have made dust control an important factor that must be considered when designing cooling equipment.

[0005] Therefore, it is necessary to invent a spiral cooling conveyor for a high-temperature rotary kiln to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a spiral cooling conveyor for a high-temperature rotary kiln to solve the problems mentioned above.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a spiral cooling conveyor for a high-temperature rotary kiln, comprising a cooling shell and a spiral shaft. The cooling shell has a double-layer jacketed structure, with an external jacketed cooling water space formed within its wall. The cooling shell is provided with an external jacketed cooling water inlet and an external jacketed cooling water outlet communicating with this space. The spiral shaft passes through the interior of the cooling shell and is composed of a hollow shaft and continuous spiral blades. An internal cooling water space for a screw is formed inside the hollow shaft, and an internal cooling water inlet and an internal cooling water outlet for a screw communicating with this space, thus forming a dual cooling system combining jacketed cooling and hollow shaft cooling. The cooling shell is also provided with a feed inlet and a discharge outlet, and the spiral blades and the inner wall of the cooling shell enclose a material conveying space.

[0008] Preferably, the cooling shell adopts a double-layer heterogeneous structure, with the inner layer being a wear-resistant layer made of wear-resistant material and the outer layer being a structural support layer made of high-strength steel, and the two layers are fixed together by welding.

[0009] Preferably, a drive device and a transmission sprocket are installed on the outside of the cooling housing. The drive device includes a motor and a reducer. The transmission sprocket consists of two chain wheels and a tension chain. One chain wheel is fixed to the end of the helical shaft, and the other is fixed to the output shaft of the reducer. Power is transmitted through the chain.

[0010] Preferably, the feed inlet of the cooling shell is located on the top surface away from the drive device. The feed inlet is located near the discharge end of the rotary kiln and adopts a flange connection structure. The flange end face of the feed inlet has an annular sealing groove, and a high-temperature resistant asbestos gasket is embedded in the sealing groove. Several bolt holes are evenly arranged on the flange along the circumference, and the flange is fastened to the flange at the discharge end of the rotary kiln by bolts.

[0011] Preferably, the top surface of the cooling housing is also provided with a glass observation window, and the glass observation window is located on the side of the top surface close to the driving device. The glass observation window is made of double-layer high-temperature resistant quartz glass, and the space between the two layers of glass is vacuumed. The edge of the glass is sealed with a silicone rubber gasket.

[0012] Preferably, material temperature measuring ports are provided on the left and right sides of the top surface of the cooling shell.

[0013] Preferably, the top surface of the discharge end of the cooling shell is provided with an inspection port, which is equipped with a sealing cover plate, and the cover plate is detachably connected to the cooling shell by bolts.

[0014] Preferably, the internal cooling water inlet of the screw and the external jacketed tube cooling water inlet are both located at the end of the cooling housing near the drive device, and the internal cooling water outlet of the screw and the external jacketed tube cooling water outlet are both located at the discharge end of the cooling housing, so as to realize the reverse flow of cooling water and material.

[0015] The technical effects and advantages provided by this utility model in the above technical solution are as follows: 1. This utility model combines the cooling water space of the cooling shell jacket with the cooling water channel inside the spiral shaft to form a dual cooling system, which can simultaneously dissipate heat evenly to the material radially (jacket) and centrally axially (shaft cooling), significantly enhancing cooling efficiency and heat exchange area. It can quickly reduce the temperature of the high-temperature material discharged from the rotary kiln and prevent the equipment from overheating and being damaged. 2. This utility model effectively solves the sealing and visibility problems under high temperature and high dust conditions by optimizing the inlet flange sealing structure and adopting a double-layer vacuum-resistant high-temperature quartz glass observation window, thereby improving the reliability of equipment operation and the convenience of maintenance. 3. By centrally setting the cooling water inlet at the drive end and the outlet at the discharge end, this utility model achieves the reverse flow of the cooling water and the material flow direction, thereby maximizing the logarithmic mean temperature difference of the cooling system and enhancing the cooling effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a top view of the overall structure of this utility model; Figure 3 This is a three-dimensional cross-sectional view of the cooling shell of this utility model; Figure 4 This is a front view of the cross-sectional structure of the cooling shell of this utility model; Figure 5 This is a schematic diagram of the three-dimensional structure of the spiral shaft of this utility model.

[0017] Explanation of reference numerals in the attached figures: 1. Cooling shell; 2. Glass observation window; 3. Screw shaft; 301. Hollow shaft; 302. Spiral blades; 303. Internal cooling water space of the screw; 4. Feed inlet; 5. Drive unit; 6. Transmission sprocket; 7. Material temperature measuring port; 8. Inspection port; 9. Discharge port; 10. Internal cooling water inlet of the screw; 11. Internal cooling water outlet of the screw; 12. Cooling water inlet of the external jacketed tube; 13. Cooling water outlet of the external jacketed tube; 14. Material conveying space; 15. Cooling water space of the external jacketed tube. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0019] This utility model provides, for example Figure 1-5 The spiral cooling conveyor for a high-temperature rotary kiln shown includes a cooling shell 1 and a spiral shaft 3. The cooling shell 1 has a double-layer jacketed structure, with an external jacketed cooling water space 15 formed in its wall. The cooling shell 1 adopts a double-layer heterogeneous structure, with an inner layer made of wear-resistant material and an outer layer made of high-strength steel structural support layer. The two layers are fixed together by welding. The cooling shell 1 is provided with an external jacketed cooling water inlet 12 and an external jacketed cooling water outlet 13 that communicate with the space. The internal cooling water inlet 10 of the screw and the external jacketed cooling water inlet 12 are both located at the end of the cooling shell 1 near the drive device 5. The internal cooling water outlet 11 of the screw and the external jacketed cooling water outlet 13 are both located at the discharge end of the cooling shell 1, realizing the counter-flow of cooling water and material.

[0020] In this embodiment, the jacket structure of the cooling shell 1 increases the heat exchange area and improves the cooling efficiency. The double-layer heterogeneous structure ensures both wear resistance and structural strength, making it suitable for high-temperature and high-wear conditions. Furthermore, the counter-current flow of cooling water and materials enhances the heat transfer temperature difference, further improving the cooling effect.

[0021] The spiral shaft 3 runs through the interior of the cooling housing 1. The spiral shaft 3 is composed of a hollow shaft 301 and continuous spiral blades 302. The interior of the hollow shaft 301 forms a screw internal cooling water space 303, and is equipped with a screw internal cooling water inlet 10 and a screw internal cooling water outlet 11 that communicate with the space, forming a dual cooling system that combines jacket cooling and hollow shaft 301 cooling. The cooling housing 1 is also provided with a feed inlet 4 and a discharge outlet 9. The spiral blades 302 and the inner wall of the cooling housing 1 enclose a material flow space 14.

[0022] In this embodiment, the dual cooling system effectively improves the overall heat dissipation capacity, prevents high-temperature materials from causing equipment deformation or damage, and the continuous spiral blades 302 push the material forward evenly, avoiding blockage and material accumulation, realizing the integration of cooling and conveying functions, which is suitable for continuous processing of high-temperature materials.

[0023] The cooling shell 1 is equipped with a drive unit 5 and a transmission sprocket 6. The drive unit 5 includes a motor and a reducer. The transmission sprocket 6 consists of two chain wheels and a tension chain. One chain wheel is fixed to the end of the screw shaft 3, and the other is fixed to the output shaft of the reducer. Power is transmitted through the chain. The feed inlet 4 of the cooling shell 1 is located on the top surface away from the drive unit 5. The feed inlet 4 is located near the discharge end of the rotary kiln. The feed inlet 4 adopts a flange connection structure. The flange end face of the feed inlet 4 has an annular sealing groove. A high-temperature resistant asbestos gasket is embedded in the sealing groove. Several bolt holes are evenly arranged around the flange. The flange is fastened to the flange at the discharge end of the rotary kiln by bolts.

[0024] In this embodiment, the chain drive structure provides smooth transmission and strong load-bearing capacity, making it suitable for high-temperature and heavy-load environments. Furthermore, the 4-flange sealing structure at the feed inlet ensures sealing performance under high temperature and high dust conditions, preventing material leakage and heat loss.

[0025] The top surface of the cooling housing 1 is also provided with a glass observation window 2, which is located on the side of the top surface close to the drive device 5. The glass observation window 2 is made of double-layer high-temperature resistant quartz glass, and the two layers of glass are vacuum-treated. The glass edge is sealed with a silicone rubber gasket between it and the cooling housing 1. Material temperature measuring ports 7 are provided on the left and right sides of the top surface of the cooling housing 1. The top surface of the discharge end of the cooling housing 1 is provided with an inspection port 8, which is equipped with a sealing cover plate. The cover plate is detachably connected to the cooling housing 1 by bolts and is provided with a sealing ring.

[0026] In this embodiment, the double-layered vacuum glass observation window 2 is resistant to high temperature and prevents condensation, facilitating real-time observation of the internal material status. A temperature sensor is installed inside the material temperature measuring port 7, and the temperature sensor probe extends into the material conveying space 14 to measure the temperature of the material in a non-contact manner. The dual measuring points can simultaneously monitor the temperature distribution and change trend of the material during the conveying process, making it easy to grasp the cooling effect. The temperature measuring port is also equipped with a sealed interface to prevent dust from escaping or cold air from leaking, ensuring the sealing of the equipment under negative pressure or normal pressure environments.

[0027] Working principle of this utility model: Refer to the instruction manual appendix Figure 1-5 When using this utility model, firstly, the discharge end of the rotary kiln is sealed and connected to the inlet 4 of the cooling conveyor of this utility model through a flange. The external cooling water source pipe is connected to the internal cooling water inlet 10 of the screw and the external jacketed pipe cooling water inlet 12 through a water pump. The corresponding water outlet pipes are connected to the internal cooling water outlet 11 of the screw and the external jacketed pipe cooling water outlet 13 of the screw. The cooling water pump is turned on first, so that the cooling water enters the internal cooling water space 303 of the screw and the external jacketed pipe cooling water space 15 respectively. The cooling water flows from the feed end of the drive end to the discharge end, which is opposite to the flow direction of the subsequent material, forming a reverse heat exchange. Then, the drive unit 5 is started, and the motor drives the spiral shaft 3 to rotate at a constant speed through the reducer and the transmission sprocket 6. Subsequently, the high-temperature material enters the material flow space 14 inside the cooling shell 1 from the rotary kiln through the feed port 4. Under the push of the continuous spiral blades 302, the high-temperature material moves along the material flow space 14 towards the discharge port 9. During this process, the material is simultaneously subjected to the dual heat exchange effect of internal cooling of the spiral shaft 3 and cooling of the shell jacket, and the temperature gradually decreases. The cooled material is discharged through the discharge port 9 and enters the next process.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A spiral cooling conveyor for a high-temperature rotary kiln, comprising a cooling shell (1) and a spiral shaft (3), characterized in that: The cooling shell (1) is a double-layer jacketed structure, and an external jacketed tube cooling water space (15) is formed in its wall. The cooling shell (1) is provided with an external jacketed tube cooling water inlet (12) and an external jacketed tube cooling water outlet (13) communicating with the space. The spiral shaft (3) runs through the interior of the cooling shell (1). The spiral shaft (3) is composed of a hollow shaft (301) and continuous spiral blades (302). The hollow shaft (301) forms a screw internal cooling water space (303), and is provided with a screw internal cooling water inlet (10) and a screw internal cooling water outlet (11) communicating with the space, thus forming a dual cooling system combining jacketed cooling and hollow shaft (301) cooling. The cooling shell (1) is also provided with a feed inlet (4) and a discharge outlet (9). The spiral blades (302) and the inner wall of the cooling shell (1) enclose a material flow space (14).

2. The spiral cooling conveyor for a high-temperature rotary kiln according to claim 1, characterized in that: The cooling shell (1) adopts a double-layer heterogeneous structure. The inner layer is a wear-resistant layer made of wear-resistant material, and the outer layer is a structural support layer made of high-strength steel. The two layers are fixed by welding.

3. The spiral cooling conveyor for a high-temperature rotary kiln according to claim 2, characterized in that: The cooling housing (1) is equipped with a drive device (5) and a transmission sprocket (6). The drive device (5) includes a motor and a reducer. The transmission sprocket (6) consists of two chain wheels and a tension chain. One chain wheel is fixed to the end of the spiral shaft (3), and the other is fixed to the output shaft of the reducer. Power is transmitted through the chain.

4. The spiral cooling conveyor for a high-temperature rotary kiln according to claim 1, characterized in that: The feed inlet (4) of the cooling shell (1) is located on the top surface away from the drive device (5). The feed inlet (4) is located near the discharge end of the rotary kiln. The feed inlet (4) adopts a flange connection structure. The flange end face of the feed inlet (4) is provided with an annular sealing groove. A high-temperature resistant asbestos gasket is embedded in the sealing groove. Several bolt holes are evenly arranged on the flange along the circumference. The flange is fastened to the flange at the discharge end of the rotary kiln by bolts.

5. The spiral cooling conveyor for a high-temperature rotary kiln according to claim 4, characterized in that: The top surface of the cooling housing (1) is also provided with a glass observation window (2), and the glass observation window (2) is located on the side of the top surface close to the drive device (5). The glass observation window (2) is made of double-layer high-temperature resistant quartz glass, and the two layers of glass are vacuumed. The glass edge and the cooling housing (1) are sealed with a silicone rubber gasket.

6. The spiral cooling conveyor for a high-temperature rotary kiln according to claim 5, characterized in that: Material temperature measuring ports (7) are provided on the left and right sides of the top surface of the cooling shell (1).

7. The spiral cooling conveyor for a high-temperature rotary kiln according to claim 6, characterized in that: The top surface of the discharge end of the cooling shell (1) is provided with an inspection port (8), which is equipped with a sealing cover plate. The cover plate is detachably connected to the cooling shell (1) by bolts and is provided with a sealing ring.

8. The spiral cooling conveyor for a high-temperature rotary kiln according to claim 1, characterized in that: The internal cooling water inlet (10) of the screw and the external jacketed tube cooling water inlet (12) are both located at one end of the cooling shell (1) near the drive device (5). The internal cooling water outlet (11) of the screw and the external jacketed tube cooling water outlet (13) are both located at the discharge end of the cooling shell (1), so as to realize the reverse flow of cooling water and material.

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