A plowshare type rotary kiln
By dividing the rotary kiln into a drying section, a combustion section, and a burnout section, and by setting up a spiral lifting and lifting structure, the problems of slender materials returning to the rotary kiln and incomplete combustion are solved, thus achieving complete combustion of materials and reducing dust.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG HUANXING MACHINERY
- Filing Date
- 2025-06-10
- Publication Date
- 2026-07-14
AI Technical Summary
Existing rotary kilns are prone to material backflow and incomplete combustion when processing slender materials, which affects the heating effect.
The kiln body is divided into a drying section, a combustion section, and a burnout section. Each section is equipped with a spiral lifting structure, a high-level lifting structure, and a low-level lifting structure. The spiral lifting structure guides the material, while the high-level and low-level lifting structures ensure complete combustion of the material.
This ensures complete combustion of materials, reduces material return, and lowers the amount of dust in the flue gas.
Smart Images
Figure CN224499042U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rotary kiln technology, specifically to a lifting rotary kiln. Background Technology
[0002] Rotary kilns are important industrial high-temperature processing equipment, widely used in many fields. They process materials under continuous high temperature by rotating a cylindrical kiln at an incline. The interior of a rotary kiln is usually hollow, and the material is dried and burned by the heat generated by auxiliary energy or by the combustion of the material itself.
[0003] In existing technologies, the material inside a rotary kiln is tumbled and burned solely by the rotation of the kiln itself, which can easily lead to incomplete combustion of the material.
[0004] Chinese Publication No. CN213932006U discloses a rotary kiln lining for zinc leaching slag with a lifting function. It includes a refractory lining layer composed of several refractory lining bricks arranged on the insulating lining of the rotary kiln; several lifting bricks are distributed in a ring at equal intervals on the refractory lining layer; the end face of the lifting brick protrudes from the inner surface of the refractory lining layer.
[0005] The rotary kiln disclosed above achieves the material lifting effect under the action of the lifting bricks. However, when treating slender materials at high temperatures, due to the small stacking angle of the slender materials, the slender materials are prone to backflow inside the rotary kiln, causing material leakage and other issues, which affect the heating effect of the rotary kiln. Utility Model Content
[0006] The present invention aims to overcome the defects in the prior art and provide a lifting rotary kiln with complete combustion and simple structure.
[0007] To achieve the above-mentioned utility model objectives, the present utility model adopts the following technical solution: a lifting rotary kiln, comprising a kiln body and a kiln cavity formed inside the kiln body; the kiln cavity is divided into a drying section, a combustion section, and a burnout section connected sequentially along the length of the kiln body; the drying section is provided with a spiral lifting structure for conveying materials toward the combustion section, the combustion section is provided with a high-level lifting structure for fully burning the materials, and the burnout section is provided with a low-level lifting structure for ensuring complete combustion of the materials; the spiral lifting structure, the high-level lifting structure, and the low-level lifting structure are all installed on the inner wall of the kiln body.
[0008] As a preferred embodiment of this utility model, the spiral lifting structure includes several spiral groups for guiding the material toward the combustion section, and the spiral groups are inclined along the radial direction of the kiln body.
[0009] As a preferred embodiment of this utility model, the spiral assembly is composed of several guide lifting plates arranged in sequence, with a feeding gap formed between adjacent guide lifting plates.
[0010] As a preferred embodiment of this utility model, the high-level material lifting structure includes several high-level strip groups arranged along the axial direction of the kiln body, and the several high-level strip groups are arranged in parallel along the radial direction of the kiln body.
[0011] As a preferred embodiment of this utility model, the high-level material lifting structure further includes several turning groups arranged along the axial direction of the kiln body, several high-level strip groups arranged in parallel along the radial direction of the kiln body, and the several turning groups and several high-level strip groups are alternately arranged along the radial direction of the kiln body.
[0012] As a preferred embodiment of this utility model, the high-position strip group is composed of several high-position lifting plates arranged in sequence, and the flipping group is composed of several flipping lifting plates arranged in sequence.
[0013] As a preferred embodiment of this utility model, the density of the high-level material lifting structure in the combustion section gradually decreases towards the burnout section.
[0014] As a preferred embodiment of this utility model, the low-position material lifting structure includes several low-position strip groups arranged along the axial direction of the kiln body, and the several low-position strip groups are arranged in parallel along the radial direction of the kiln body.
[0015] As a preferred embodiment of this utility model, the low-position strip group is composed of several low-position lifting plates arranged sequentially from end to end.
[0016] As a preferred embodiment of this utility model, positioning holes for installing the spiral lifting structure, the high-level lifting structure and the low-level lifting structure are formed on the inner wall of the kiln.
[0017] Compared with existing technologies, by dividing the kiln body into sequentially connected drying, combustion, and burnout sections, and guiding the material under the action of the spiral lifting structure to prevent material backflow, and by lifting the material under the action of the high-level and low-level lifting structures to ensure complete combustion, the material is lifted in sequence through the high-level and low-level lifting structures, thereby reducing the degree of material lifting and reducing the amount of dust carried in the flue gas when the material is discharged. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the kiln body unfolding.
[0019] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;
[0020] Figure 3 yes Figure 1 A magnified view of a section at point B in the middle;
[0021] Figure 4 This is a cross-sectional schematic diagram of the combustion section;
[0022] Figure 5 This is a schematic diagram of the drying section.
[0023] Figure 6 This is a schematic diagram of the positioning hole installation;
[0024] Reference numerals: 1. Kiln body; 2. Drying section; 21. Spiral lifting structure; 22. Spiral line group; 23. Guide lifting plate; 24. Feed gap; 3. Combustion section; 31. High-level lifting structure; 32. High-level strip group; 33. Tilting group; 34. Tilting lifting plate; 35. High-level lifting plate; 4. Burnout section; 41. Low-level lifting structure; 42. Low-level strip group; 43. Low-level lifting plate; 5. Positioning hole. Detailed Implementation
[0025] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.
[0026] like Figures 1-6 As shown, a type of rotary kiln with lifting mechanism includes a kiln body 1 and a kiln cavity formed inside the kiln body 1. The kiln cavity is divided into a drying section 2, a combustion section 3, and a burnout section 4 that are connected sequentially along the length of the kiln body 1. The drying section 2 is provided with a spiral lifting structure 21 for conveying materials toward the combustion section 3. The combustion section 3 is provided with a high-level lifting structure 31 for fully burning the materials. The burnout section 4 is provided with a low-level lifting structure 41 for ensuring that the materials are completely burned. The spiral lifting structure 21, the high-level lifting structure 31, and the low-level lifting structure 41 are all installed on the inner wall of the kiln body 1.
[0027] Combustion section 3 is located between drying section 2 and burnout section 4. When the material is burning in the kiln body 1, it passes through drying section 2, combustion section 3 and burnout section 4 in sequence. Under the action of spiral lifting structure 21, the material is guided into combustion section 3 to prevent material backflow. Under the action of high-level lifting structure 31 and low-level lifting structure 41, the material is lifted, thereby achieving material tumbling and ensuring complete combustion of the material.
[0028] The spiral lifting structure 21 includes several spiral groups 22 for guiding the material toward the combustion section 3. The spiral groups 22 are inclined along the radial direction of the kiln body 1. Under the action of multiple spiral groups 22, they are combined to form a spiral lifting structure 21 with a spiral structure, thereby realizing the guiding effect of the material under the combined action of multiple spiral groups 22.
[0029] The spiral assembly 22 is composed of several guide lifting plates 23 arranged in sequence. A feeding gap 24 is formed between adjacent guide lifting plates 23. As the kiln body 1 rotates, the spiral assembly 22 generates synchronous spiral rotation. Under the action of the guide lifting plates 23 contacting the material, the material is guided to move towards the combustion section 3. During the guiding process, the material can move between adjacent spiral assemblies 22 through the feeding gap 24 until the material moves into the combustion section 3.
[0030] The high-level material lifting structure 31 includes several high-level strip groups 32 arranged along the axial direction of the kiln body 1, and the several high-level strip groups 32 are arranged in parallel along the radial direction of the kiln body 1.
[0031] The high-level material lifting structure 31 also includes several tilting groups 33 arranged along the axial direction of the kiln body 1, and several high-level strip groups 32 arranged in parallel along the radial direction of the kiln body 1, and the several tilting groups 33 and the several high-level strip groups 32 are alternately arranged along the radial direction of the kiln body 1.
[0032] Under the action of the high-position strip group 32 and the flipping group 33, the material is lifted to ensure complete combustion.
[0033] The high-position strip group 32 consists of several high-position lifting plates 35 arranged in sequence, and the tilting group 33 consists of several tilting lifting plates 34 arranged in sequence.
[0034] The high-level lifting plate 35 is a long strip structure and is set along the axial direction of the kiln body 1. The tilting lifting plate 34 is an L-shaped structure and is also set along the axial direction of the kiln body 1. The tilting lifting plate 34 is bent along the radial direction of the kiln body 1 to form a tilting structure.
[0035] The arrangement density of the high-level lifting structure 31 in the combustion section 3 gradually decreases towards the burnout section 4. As the high-level lifting structure 31 causes a large amount of dust to be carried in the flue gas in the kiln body 1, the gradually decreasing arrangement density of the high-level lifting structure 31 ensures the full combustion of the material while gradually reducing the tumbling of the material, thereby minimizing the amount of dust in the flue gas exiting the kiln body 1.
[0036] The low-position lifting structure 41 includes several low-position strip groups 42 arranged along the axial direction of the kiln body 1. The several low-position strip groups 42 are arranged in parallel along the radial direction of the kiln body 1. The low-position strip groups 42 are composed of several low-position lifting plates 43 arranged end to end.
[0037] The height of the low-position lifting plate 43 is less than the height of the high-position lifting plate 35. Under the action of the low-position lifting plate 43, the overturning of the material is further gradually reduced, thereby minimizing the amount of dust in the flue gas exiting the kiln body 1.
[0038] The inner wall of the kiln body 1 has positioning holes 5 for installing the spiral lifting structure 21, the high-level lifting structure 31 and the low-level lifting structure 41. The spiral lifting structure 21, the high-level lifting structure 31 and the low-level lifting structure 41 are fixed to various lifting plates by bolts, and each lifting plate is provided with two positioning holes 5 to prevent the lifting plate from rotating.
[0039] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
[0040] Although this document frequently uses reference numerals from the accompanying drawings, such as kiln body 1, drying section 2, spiral lifting structure 21, spiral line group 22, guide lifting plate 23, feeding gap 24, combustion section 3, high-level lifting structure 31, high-level strip group 32, tilting group 33, tilting lifting plate 34, high-level lifting plate 35, burnout section 4, low-level lifting structure 41, low-level strip group 42, low-level lifting plate 43, and positioning hole 5, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.
Claims
1. A rotary kiln with lifting mechanism, comprising a kiln body (1) and a kiln cavity formed inside the kiln body (1); characterized in that, The kiln cavity is divided into a drying section (2), a combustion section (3) and a burnout section (4) connected in sequence along the length of the kiln body (1); the drying section (2) is provided with a spiral lifting structure (21) for conveying materials toward the combustion section (3), the combustion section (3) is provided with a high-level lifting structure (31) for fully burning materials, and the burnout section (4) is provided with a low-level lifting structure (41) for ensuring that materials are burned out; the spiral lifting structure (21), the high-level lifting structure (31) and the low-level lifting structure (41) are all installed on the inner wall of the kiln body (1).
2. The lifting rotary kiln according to claim 1, characterized in that, The spiral lifting structure (21) includes several spiral groups (22) for guiding the material toward the combustion section (3), and the spiral groups (22) are inclined along the radial direction of the kiln body (1).
3. A lifting rotary kiln according to claim 2, characterized in that, The spiral assembly (22) is composed of several guide lifting plates (23) arranged in sequence, with a feeding gap (24) formed between adjacent guide lifting plates (23).
4. A lifting rotary kiln according to claim 1, characterized in that, The high-level material lifting structure (31) includes several high-level strip groups (32) arranged along the axial direction of the kiln body (1), and the several high-level strip groups (32) are arranged in parallel along the radial direction of the kiln body (1).
5. A lifting rotary kiln according to claim 4, characterized in that, The high-level material lifting structure (31) also includes several flipping groups (33) arranged along the axial direction of the kiln body (1), several high-level strip groups (32) arranged in parallel along the radial direction of the kiln body (1), and several flipping groups (33) and several high-level strip groups (32) are alternately arranged along the radial direction of the kiln body (1).
6. A lifting rotary kiln according to claim 5, characterized in that, The high-position strip group (32) consists of several high-position lifting plates (35) arranged in sequence from head to tail, and the flipping group (33) consists of several flipping lifting plates (34) arranged in sequence from head to tail.
7. A lifting rotary kiln according to claim 5, characterized in that, The density of the high-level lifting structure (31) in the combustion section (3) gradually decreases towards the burnout section (4).
8. A lifting rotary kiln according to claim 1, characterized in that, The low-position lifting structure (41) includes several low-position strip groups (42) arranged along the axial direction of the kiln body (1), and the several low-position strip groups (42) are arranged in parallel along the radial direction of the kiln body (1).
9. A lifting rotary kiln according to claim 8, characterized in that, The low-position strip group (42) is composed of several low-position lifting plates (43) arranged in sequence.
10. A lifting rotary kiln according to claim 1, characterized in that, The inner wall of the kiln body (1) has positioning holes (5) for installing the spiral lifting structure (21), the high-level lifting structure (31) and the low-level lifting structure (41).