Coal quality activated carbon rotary kiln liner and its modular structure and assembly method

Abstract

This invention discloses a rotary kiln liner for coal-based activated carbon, its modular structure, and assembly method. It overcomes the shortcomings of existing rotary kiln liners, such as easy deformation and waste gas accumulation affecting activation. The rotary kiln liner is located within the rotary kiln body and includes: a central tube, multiple stirring blades, at least one connecting hoop, fasteners, and at least one exhaust port. This invention provides a modular structure for the rotary kiln liner, including stirring components and fastener components. The method for assembling the modular structure includes sequentially and spacedly connecting the fastener components and stirring components along the axial direction of the central tube. The assembled liner has at least one fastener component with a clamping clamp. This invention features a stable structure, long service life, smooth exhaust, and sufficient reaction. The modular design facilitates implementation and ensures reliable connection. The support plate and connecting strip strengthen the connection between the stirring blade tip and the connecting hoop, as well as between the stirring blade root and the central tube, making the entire liner structure more robust and durable.

Description

Technical Field

[0001] This invention relates to the field of activated carbon production equipment technology, specifically to a rotary kiln liner for coal-based activated carbon production, and particularly to a liner structure with enhanced stirring and stabilizing functions and its modular implementation scheme. Background Technology

[0002] Rotary kilns are key equipment in the production of coal-based activated carbon, used for heat treatment processes such as carbonization and activation of materials. To improve processing efficiency and product quality, an inner liner is usually installed inside the rotary kiln. The material is stirred by a stirring structure on the inner liner to ensure uniform heating.

[0003] Existing rotary kiln liner structures mostly employ a central shaft combined with stirring blades. However, in practical applications, this structure has several drawbacks: First, the relatively long stirring blades are prone to bending or deformation under the rotation of the rotary kiln and the impact of materials, leading to a decrease in stirring efficiency and even scraping against the kiln's inner wall; second, traditional liner structures are mostly integrally welded, making manufacturing, transportation, and installation extremely inconvenient, especially when the kiln body is long, making overall hoisting and positioning extremely difficult; third, waste gas generated during material handling tends to accumulate in the area between the stirring blades and the kiln wall, affecting the smooth progress of the activation reaction.

[0004] Therefore, there is an urgent need for a rotary kiln liner that is structurally sound, easy to manufacture and install, and can promptly discharge exhaust gases. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a rotary kiln liner for coal-based activated carbon that has a stable structure, good stirring effect, and convenient exhaust.

[0006] Another objective of this invention is to provide a modular structure for the rotary kiln liner described above, in order to solve the problems of difficulty in manufacturing, transporting and installing long-sized liners.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] In a first aspect, the present invention provides a rotary kiln liner for coal-based activated carbon, disposed within the rotary kiln body, comprising:

[0009] The central tube is arranged along the axial direction of the rotary kiln body;

[0010] Multiple stirring blades are arranged at intervals along the circumference and axial direction of the central tube on its outer wall;

[0011] At least one connecting hoop is fitted around the outer periphery of the plurality of stirring blades and connects the ends of the stirring blades into one piece;

[0012] Fasteners are inserted through holes provided on the connecting hoop to secure the connecting hoop to the inner wall of the rotary kiln body;

[0013] At least one exhaust port is provided on the wall of the central tube for discharging waste gas from the area between the stirring blades and the inner wall of the rotary kiln body.

[0014] Furthermore, a support plate is provided between the end of the stirring blade and the inner surface of the connecting hoop to enhance the support contact area and improve structural stability.

[0015] Furthermore, the insertion hole is a through hole, which is opened from the outer surface of the connecting hoop and extends through to the support plate, so that the fastener can lock the connecting hoop and the support plate at the same time, making the fixation more secure.

[0016] Furthermore, a connecting strip is provided between the stirring blade and the outer wall of the central tube to strengthen the connection at the root of the stirring blade and prevent it from falling off the central tube.

[0017] Furthermore, a clamping clamp is provided between the connecting hoops, and a gap is provided between the clamping clamp and the rotary kiln body. The clamping clamp locks and fixes the ends of the plurality of stirring blades through a locking mechanism. This structure allows the clamping clamp to contract to a certain extent when locking, thereby tightly clamping the ends of all the stirring blades.

[0018] Secondly, the present invention provides a modular structure for the rotary kiln liner described above, wherein the rotary kiln liner is assembled from multiple prefabricated modules. The prefabricated modules include two types:

[0019] The stirring assembly includes a central tube section and several stirring blades disposed on the outer periphery of the central tube section;

[0020] The clamping assembly includes a central tube section, several stirring blades disposed on the outer periphery of the central tube section, and a connecting clamp sleeved on the ends of the stirring blades and fixed to the inner wall of the rotary kiln body by fasteners.

[0021] Furthermore, the stirring assembly and the clamping assembly are alternately connected along the axial direction of the central tube, thereby forming multiple stable support points along the entire length of the inner liner.

[0022] Furthermore, in both the stirring assembly and the clamping assembly, a connecting strip can be provided between the stirring blade and the outer wall of the central tube to uniformly strengthen the root strength of all stirring blades.

[0023] Furthermore, in the clamping assembly, a support plate is provided between the end of the stirring blade and the connecting clamp.

[0024] Thirdly, the present invention provides a method for assembling the above-mentioned modular structure, comprising the following steps:

[0025] a. Connect the clamping assembly and the stirring assembly sequentially and at intervals along the axial direction of the central tube;

[0026] b. Adjust the number of stirring components and / or the length of the central tube according to the actual depth of the rotary kiln body;

[0027] c. Ensure that the assembled inner liner has at least one clamping assembly with a clamping clamp.

[0028] Beneficial effects

[0029] Compared with the prior art, the present invention has the following significant advantages:

[0030] 1. Sturdy structure and long service life: The dispersed mixing blade ends are connected into a whole by connecting hoops (especially clamping hoops) and fixed to the inner wall of the kiln by fasteners, which greatly enhances the overall rigidity and anti-deformation ability of the inner liner, effectively prevents the mixing blades from bending and shaking, and extends the service life of the equipment.

[0031] 2. Smooth exhaust and full reaction: The exhaust hole on the central tube can promptly discharge the waste gas accumulated between the stirring blade and the kiln wall, improve the kiln atmosphere, facilitate the full carbonization and activation reaction, and improve the quality of activated carbon products.

[0032] 3. Modular design for easy implementation: The long inner liner is broken down into standardized mixing and clamping components, enabling modular production. This results in higher manufacturing precision, lower transportation costs, and more flexible and faster on-site installation. It can easily adapt to rotary kilns of different lengths, significantly reducing manufacturing and maintenance costs.

[0033] 4. Reliable connection: By setting up a support plate and connecting strip, the connection strength between the end of the stirring blade and the connecting hoop, and between the root of the stirring blade and the central tube are strengthened respectively, making the entire inner tank structure more robust and durable. Attached Figure Description

[0034] Figure 1 This is a three-dimensional structural schematic diagram of Embodiment 1 of the rotary kiln liner of the present invention;

[0035] Figure 2 This is a front view schematic diagram of the rotary kiln inner liner of Embodiment 1 of the present invention;

[0036] Figure 3 This is a schematic diagram of the left side of the rotary kiln inner liner of Embodiment 1 of the present invention;

[0037] Figure 4 This is a three-dimensional structural schematic diagram of the modular stirring assembly of Embodiment 1 of the rotary kiln inner liner of the present invention;

[0038] Figure 5This is a front view schematic diagram of the modular structure stirring assembly of Embodiment 1 of the rotary kiln inner liner of the present invention;

[0039] Figure 6 This is a side view of the modular structure stirring assembly of Embodiment 1 of the rotary kiln liner of the present invention;

[0040] Figure 7 This is a three-dimensional structural schematic diagram of the modular structure clamping assembly of Embodiment 1 of the rotary kiln liner of the present invention;

[0041] Figure 8 This is a side view of the modular structure clamping assembly of Embodiment 1 of the rotary kiln liner of the present invention;

[0042] Figure 9 This is a front view schematic diagram of the modular structure clamping assembly of Embodiment 1 of the rotary kiln liner of the present invention; Figure 10 This is a three-dimensional structural schematic diagram of the central tube of Embodiment 1 of the rotary kiln liner of the present invention;

[0043] Figure 11 This is a three-dimensional structural schematic diagram of the rotary kiln liner of embodiment 2 of the present invention;

[0044] Figure 12 This is a front view schematic diagram of the rotary kiln inner liner of embodiment 2 of the present invention;

[0045] The following are the labels in the diagram: 1. Central tube; 2. Agitator blade; 3. Connecting hoop; 4. Support plate; 5. Connecting strip; 6. Insertion hole; 7. Clamp; 8. Vent hole; 9. Agitator assembly; 10. Tightening assembly. Detailed Implementation

[0046] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0047] like Figures 1-10 The diagram shown is a schematic representation of an embodiment 1 of the rotary kiln liner for coal-based activated carbon according to the present invention. The rotary kiln liner is disposed inside the rotary kiln body (not shown in the figure). The core of the liner includes a central tube 1 extending along the axis of the rotary kiln. On the outer wall of the central tube 1, a plurality of stirring blades 2 are welded at uniform intervals along its circumference and axial direction for turning the material when the rotary kiln rotates.

[0048] To enhance the stability of the overall structure, one or more connecting hoops 3 are fitted onto the ends of the stirring blades 2. In this embodiment 1, in addition to the connecting hoops 3, a clamping hoop 7 without insertion holes 6 is also provided. It tightly clamps the ends of all surrounding stirring blades 2 through its own locking mechanism (such as bolts), forming a sturdy external frame. A support plate 4 is also welded between the end of the stirring blade 2 and the inner surface of the connecting hoops 3 to increase the stress-bearing area. Fasteners (such as anchor bolts) are inserted from the outer wall of the rotary kiln body into the insertion holes 6 on the connecting hoops 3. The insertion holes 6 are preferably through holes that extend to the support plate 4. The fasteners abut against the support plate 4, thereby firmly fixing the connecting hoops 3 and the support plate 4 together to the rotary kiln body.

[0049] In addition, a rectangular connecting strip 5 is welded between the root of the stirring blade 2 and the outer wall of the central tube 1 to reinforce the root of the stirring blade 2 and prevent it from cracking due to long-term stress. Several exhaust holes 8 are provided on the wall of the central tube 1 to guide the waste gas generated by the material reaction from the area between the stirring blade 2 and the kiln wall to the inside or outside of the central tube 1, ensuring a stable atmosphere inside the kiln.

[0050] like Figures 4-9 As shown, to achieve modularity, the entire inner liner is designed to be assembled from two prefabricated modules: a stirring assembly 9 and a clamping assembly 10. The stirring assembly 9 ( Figures 4-6 It consists of a short central tube 1 connected by a connecting strip 5 and a stirring blade 2 thereon. The clamping assembly 10 ( Figures 7-9 It also consists of a short central tube 1 connected by a connecting strip 5 and a stirring blade 2, but it also includes a connecting clamp 3, a support plate 4 and other fixing structures. The ends of the central tube 1 of each module can be designed as flanges or sleeve plug-in structures to facilitate quick docking on site.

[0051] During assembly, multiple agitator components 9 and clamping components 10 are arranged and connected alternately along the axial direction according to the length of the rotary kiln (for example, in the order of "clamping component - agitator component - clamping component - agitator component - ... center tube - center tube"). By adjusting the number of agitator components 9, different kiln lengths can be flexibly accommodated. Finally, ensure that at least one clamping component 10 is fixed to the inner wall of the kiln with fasteners to complete the installation of the entire inner liner.

[0052] like Figures 11-12The diagram shows a schematic representation of an embodiment 2 of the rotary kiln liner for coal-based activated carbon according to the present invention. The rotary kiln liner is disposed inside the rotary kiln body (not shown in the figure). The core of the liner includes a central tube 1 extending along the axis of the rotary kiln. On the outer wall of the central tube 1, a plurality of stirring blades 2 are welded at uniform intervals along its circumference and axial direction for turning the material when the rotary kiln rotates. Unlike the embodiment, when the stirring assembly 9 and the clamping assembly 10 are connected, polygonal connecting blocks are provided on the central tube 1 and the stirring blades 2 to increase the connection length and meshing pairs, so that the connection between each section is tight. The length of the central tube 1 is longer than that of embodiment 1.

[0053] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A coal-based activated carbon rotary kiln liner, which is arranged in a rotary kiln body, characterized in that, The utility model relates to a rotary kiln inner shell, comprising: a central pipe (1) arranged along the axial direction of the rotary kiln body; a plurality of stirring blades (2) arranged on the outer wall of the central pipe (1) in the circumferential and axial directions; at least one connecting hoop (3) sleeved on the outer periphery of the plurality of stirring blades (2) and connecting the end portions of the stirring blades (2) into one body; a fastener passing through a hole (6) provided on the connecting hoop (3) to fix the connecting hoop (3) to the inner wall of the rotary kiln body; at least one exhaust hole (8) provided on the pipe wall of the central pipe (1) for discharging exhaust gas from the area between the stirring blades (2) and the inner wall of the rotary kiln body; a supporting plate (4) is further arranged between the end portion of the stirring blade (2) and the inner surface of the connecting hoop (3), and the hole (6) is a through hole opening from the outer surface of the connecting hoop (3) and penetrating to the supporting plate (4); a hoop (7) is further arranged between the connecting hoops (3), and a gap is provided between the hoop (7) and the rotary kiln body, and the end portions of the plurality of stirring blades (2) are locked and fixed by a locking mechanism.

2. The rotary kiln liner of claim 1, wherein, A connecting strip (5) is further arranged between the stirring blade (2) and the outer wall of the central pipe (1).

3. A modular construction of a rotary kiln liner according to claim 1 or 2, characterized in that, The rotary kiln inner shell is assembled by a plurality of prefabricated modules, and the prefabricated module comprises: a stirring assembly (9) comprising a section of central pipe (1) and a plurality of stirring blades (2) arranged on the outer periphery of the section of central pipe (1); a tight hoop assembly (10) comprising a section of central pipe (1), a plurality of stirring blades (2) arranged on the outer periphery of the section of central pipe (1), and a connecting hoop (3) sleeved on the end portions of the stirring blades (2) and fixed to the inner wall of the rotary kiln body by a fastener.

4. The modular structure of claim 3, wherein, The stirring assembly (9) and the tight hoop assembly (10) are alternately connected in the axial direction of the central pipe (1).

5. The modular structure of claim 3, wherein, A connecting strip (5) is further arranged between the stirring blade (2) and the outer wall of the central pipe (1).

6. The modular structure of claim 3, wherein, In the tight hoop assembly (10), a supporting plate (4) is arranged between the end portion of the stirring blade (2) and the connecting hoop (3).

7. A method of assembling a modular structure as claimed in any one of claims 3-6, characterized in that, The utility model relates to a rotary kiln inner shell, comprising: a. sequentially and spacedly connecting the tight hoop assemblies (10) and the stirring assemblies (9) in the axial direction of the central pipe (1); b. adjusting the number of stirring assemblies (9) used and / or the length of the central pipe (1) according to the actual depth of the rotary kiln body; c. ensuring that the assembled inner shell has at least one tight hoop assembly (10) with a hoop (7) distributed thereon.

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