Carbonization incinerator for activated carbon production

Abstract

The carbonization incinerator for activated carbon production comprises a U-shaped shell, the inner wall of the U-shaped shell is a U-shaped groove in continuous arc transition, and an open notch is formed in the top of the U-shaped shell; the coaxial reverse double-spiral conveying mechanism comprises two conveying shafts arranged in parallel and different-direction spiral blades installed on the shafts, and gaps are kept between the outer edges of the spiral blades and the inner wall of the U-shaped shell. According to the carbonization incinerator for activated carbon production, by arranging the U-shaped groove and the coaxial reverse double-spiral conveying mechanism, raw materials for carbonization are overturned and stirred while being conveyed, and the problems that in the prior art, activated carbon raw materials (such as coconut shells and wood chips) are prone to being stacked in a bin to form dead corners, local carbonization is insufficient, and the service life of the raw materials is prolonged are solved. And the product quality is unstable.

Description

Technical Field

[0001] This utility model relates to the technical field of carbonization incinerators, and more particularly to a carbonization incinerator for activated carbon production. Background Technology

[0002] Carbonization incinerators are the core equipment in activated carbon production. They are mainly used to pyrolyze carbon-containing raw materials (such as wood chips and straw) at high temperatures in the absence of air. This equipment is characterized by continuous operation.

[0003] A utility model patent, titled "A Carbonization Furnace for Activated Carbon Production," with publication number CN220502961U, is disclosed. It includes a combustion chamber, with a rotating shaft mounted on one edge of the discharge chute, and a sealed chamber door mounted on the other side of the rotating shaft. This carbonization furnace for activated carbon production can form a connected structure through the combustion chamber, feed chute, auger, carbonization chamber, and discharge chute, enabling efficient and continuous carbonization operations.

[0004] However, the carbonization chamber described in the patent application is a fixed cylindrical shape and lacks an internal stirring structure. It relies solely on the auger and the rotation of the chamber to achieve mixing, which leads to the accumulation of activated carbon raw materials (such as coconut shells and wood chips) in the chamber, forming dead corners, resulting in insufficient local carbonization and unstable product quality (large differences in ash content). Utility Model Content

[0005] The purpose of this utility model is to solve the problem in the existing technology that activated carbon raw materials (such as coconut shells and wood chips) tend to accumulate in the silo, forming dead corners, resulting in insufficient local carbonization and unstable product quality.

[0006] To achieve the above objectives, this application proposes a carbonization incinerator for activated carbon production, comprising: a U-shaped outer shell, wherein the inner wall of the U-shaped outer shell is a U-shaped groove with a continuous arc transition and an open slot at the top; and a coaxial reverse double helical conveying mechanism, comprising: two parallel conveying shafts and opposite helical blades mounted on the shafts, wherein the outer edge of the helical blades maintains a gap with the inner wall of the U-shaped outer shell.

[0007] The carbonization incinerator for activated carbon production disclosed in this application, by setting up a U-shaped trough and a coaxial reverse double spiral conveying mechanism, simultaneously conveys the raw materials for carbonization and turns and agitates them, thus solving the problem in the prior art where activated carbon raw materials (such as coconut shells and wood chips) easily accumulate in the chamber, forming dead corners, resulting in insufficient local carbonization and unstable product quality.

[0008] Furthermore, in order to realize the reverse rotation and speed regulation functions of the double helix conveying mechanism, the conveying shaft of the double helix conveying mechanism is reversed through a planetary gearbox, and the output shaft of the planetary gearbox is rigidly connected to the two conveying shafts respectively.

[0009] Furthermore, in order to guide the raw materials to flow along a preset trajectory, the bottom of the U-shaped outer shell is provided with a flow-guiding protrusion that matches the rotation direction of the spiral blades.

[0010] Furthermore, to facilitate the maintenance of the incinerator, the carbonization incinerator for activated carbon production also includes: a detachable top plate assembly covering the open slot of the U-shaped outer shell, the detachable top plate assembly including a cover plate hinged to the side wall of the U-shaped outer shell, a dovetail slider disposed at the free end of the cover plate, and a dovetail groove disposed on the inner wall of the U-shaped outer shell where the dovetail slider and the dovetail slider meet.

[0011] Furthermore, to facilitate the disassembly and repair of the cover plate, the dovetail groove is provided on two opposing inner walls perpendicular to the conveying direction of the coaxial reverse double helix conveying mechanism.

[0012] Furthermore, in order to reduce the amount of large particles entering the carbonization incinerator, the carbonization incinerator for activated carbon production also includes: a crushing and grading device installed at the top of the feed end of the U-shaped shell, the crushing and grading device including: an inclined filter screen, a crushing gear set located above the inclined filter screen, and a negative pressure recovery unit with the air inlet located between the inclined filter screen and the crushing gear set.

[0013] Furthermore, in order to recover large particles of raw material screened out on the filter screen, the negative pressure recovery unit includes: a flat suction nozzle connected to the lowest end of the inclined filter screen; a negative pressure recovery pipe connected to the flat suction nozzle; and a fan connected to the negative pressure recovery pipe.

[0014] Furthermore, in order to better recover large particles of raw material located at the end of the inclined filter screen, the lowest end of the inclined filter screen extends to the flat suction nozzle, the suction port of the flat suction nozzle is directly opposite the end of the inclined filter screen, and the width of the suction port matches the width of the end of the inclined filter screen.

[0015] Furthermore, the crushing gear set includes alternating driving gears and driven gears.

[0016] 1. The carbonization incinerator for activated carbon production of this application, by setting up a U-shaped trough and a coaxial reverse double spiral conveying mechanism, simultaneously conveys the raw materials for carbonization and turns and stirs them, which solves the problem in the prior art that activated carbon raw materials (such as coconut shells and wood chips) are prone to accumulate in the bin and form dead corners, resulting in insufficient local carbonization and unstable product quality.

[0017] 2. This application provides a removable cover plate at the top of the U-shaped outer shell. When a blockage occurs inside the incinerator, the cover plate can be quickly removed to clear the blocked material.

[0018] 3. The carbonization incinerator of this application is equipped with a crushing and grading device at the feed inlet. While pre-crushing the raw materials, large particles are removed by screening through the screen of the negative pressure recovery unit, which further reduces the risk of blockage inside the carbonization incinerator. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a carbonization incinerator for activated carbon production in an embodiment of this application;

[0021] Figure 2 This is a cross-sectional view of a carbonization incinerator for activated carbon production according to an embodiment of this application;

[0022] Figure 3 for Figure 2 Enlarged view of point a in the middle.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. U-shaped outer shell; 11. Airflow guiding protrusion;

[0025] 2. Coaxial reverse double helix conveyor mechanism; 21. Conveyor shaft; 22. Opposite helical blades; 23. Planetary gearbox;

[0026] 3. Detachable top plate assembly; 31. Cover plate; 32. Dovetail slider; 33. Dovetail groove;

[0027] 4. Crushing and grading device; 41. Inclined filter screen; 42. Crushing gear set; 42a. Driving gear; 42b. Driven gear; 43. Negative pressure recovery unit; 431. Flat suction nozzle; 432. Negative pressure recovery pipe; 433. Fan; 43a. Suction inlet. Detailed Implementation

[0028] The following will be combined with the appendix Figures 1-3 The embodiments of the technical solutions of this application are described in detail below. The following embodiments are only used to more clearly illustrate the technical solutions of this application, and are therefore merely examples and should not be used to limit the scope of protection of this application. Furthermore, the technical features involved in the various embodiments of this application described below can be combined with each other as long as they do not conflict with each other. Example

[0029] like Figures 1-2As shown, the carbonization incinerator for activated carbon production in this application effectively solves the problem of dead corners formed by the accumulation of activated carbon raw materials in the silo by setting a U-shaped outer shell 1 and a coaxial reverse double spiral conveying mechanism 2.

[0030] Specifically, the inner wall of the U-shaped outer shell 1 is a U-shaped channel with a continuous arc transition. This design has several advantages. The continuous arc transition structure reduces the resistance of raw materials during transportation, allowing them to flow more smoothly within the U-shaped channel. The open slot design at the top not only facilitates the input of raw materials but also makes it easier to observe and maintain the interior. For example, when it is necessary to check the operation of internal components or clean up residual raw materials, the open slot provides convenient operating space.

[0031] Meanwhile, the coaxial counter-rotating double helical conveying mechanism 2, housed within the U-shaped outer casing 1, includes two parallel conveying shafts 21 and counter-rotating helical blades 22 mounted on the shafts. The outer edge of the helical blades 22 maintains a certain gap with the inner wall of the U-shaped outer casing 1; this gap is crucial. On one hand, it ensures that the raw material is agitated by the helical blades 22 during conveying, causing the material to continuously tumble and mix within the U-shaped trough; on the other hand, it avoids direct friction between the helical blades 22 and the inner wall of the U-shaped outer casing 1, reducing component wear and extending the equipment's service life.

[0032] Simultaneously, the two conveyor shafts 21 rotate in opposite directions via a planetary gearbox 23. As a key component for power distribution and transmission, the planetary gearbox 23's output shafts are rigidly connected to the two conveyor shafts 21, ensuring stable and synchronous counter-rotation. When the conveyor shafts 21 rotate in opposite directions, the opposing helical blades 22 work collaboratively within the U-shaped groove. Specifically, while one helical blade 22 pushes the raw material forward, the other helical blade 22 exerts a force in the opposite direction on the material, causing it to be continuously tumbled and agitated during transport. This tumbling and agitating action ensures uniform distribution of the raw material within the U-shaped groove, preventing accumulation and dead zones, effectively solving the problem of insufficient local carbonization, and improving the stability and consistency of product quality.

[0033] Furthermore, the bottom of the U-shaped outer shell 1 is provided with a guide protrusion 11 that matches the rotation direction of the spiral blade 22. The guide protrusion 11 can guide the raw material to flow along a preset trajectory, further enhancing the flowability and mixing effect of the raw material in the U-shaped groove. When the spiral blade 22 rotates, the guide protrusion 11 can guide the raw material to a specific area, allowing the raw material to interact better with the spiral blade 22, thereby improving the efficiency of conveying and mixing. Example

[0034] Please refer to Figure 2 and Figure 3In order to facilitate the removal of the cover plate for quick maintenance and to clear the blocked material in the incinerator, this application provides a detachable top plate assembly 3 on the top of the U-shaped outer shell 1.

[0035] Specifically, the detachable top plate assembly 3 includes a cover plate 31 hinged to the side wall of the U-shaped housing 1, a dovetail slider 32 disposed at the free end of the cover plate 31, and a dovetail groove 33 disposed on the inner wall of the U-shaped housing 1 where it meets the dovetail slider 32. The cover plate 31 is connected to the U-shaped housing 1 by hinge, which allows the cover plate 31 to rotate around the hinge point for easy opening and closing. The mating design of the dovetail slider 32 and the dovetail groove 33 is the core of this assembly. The dovetail groove 33 has a specific shape that allows it to fit tightly with the dovetail slider 32, providing a stable sliding track.

[0036] When blockage occurs inside the incinerator or maintenance is required, the operator can easily slide the dovetail slider 32 on the cover plate 31, allowing it to move along the dovetail groove 33 on the inner wall of the U-shaped outer shell 1. Since the dovetail groove 33 is located on two opposing inner walls perpendicular to the conveying direction of the coaxial reverse double helix conveying mechanism 2, this design not only facilitates the disassembly and installation of the cover plate but also ensures a tight fit between the cover plate and the U-shaped outer shell 1 when closed. When the cover plate 31 is closed, the dovetail slider 32 fits tightly within the dovetail groove 33, effectively preventing raw materials from leaking out of the open opening, ensuring normal equipment operation and a clean working environment. Example

[0037] Please refer to Figure 2 and Figure 3 In order to further reduce the risk of blockage inside the carbonization incinerator, this application provides a crushing and grading device 4 at the top of the feed end of the U-shaped shell 1.

[0038] Specifically, the crushing and grading device 4 includes an inclined filter screen 41, a crushing gear set 42 located above the inclined filter screen 41, and a negative pressure recovery unit 43 with the air inlet end located between the inclined filter screen 41 and the crushing gear set 42.

[0039] Simultaneously, an inclined filter screen 41 is provided. When the raw material falls from above, the inclined surface of the filter screen allows the raw material to slide naturally downwards under the action of gravity, increasing the contact area and time between the raw material and the filter screen, thus improving screening efficiency. Fine particles of raw material can pass smoothly through the pores of the filter screen, while large particles are intercepted. Meanwhile, the crushing gear set 42 includes a staggered drive gear 42a and a driven gear 42b. The drive gear 42a rotates under the drive of the power source, driving the driven gear 42b to rotate in the opposite direction. The staggered gear structure allows the raw material to be subjected to extrusion and shearing forces in multiple directions when entering the crushing gear set 42, thereby achieving effective crushing of the raw material. The crushed raw material particles are finer and more evenly distributed, providing better conditions for the subsequent carbonization process.

[0040] Furthermore, the negative pressure recovery unit 43 includes a flat suction nozzle 431 connected to the lowest end of the inclined filter 41, a negative pressure recovery pipe 432 connected to the flat suction nozzle 431, and a blower 433 connected to the negative pressure recovery pipe 432. The lowest end of the inclined filter 41 extends to the flat suction nozzle 431, and the suction port 43a of the flat suction nozzle 431 faces the end of the inclined filter 41, with the width of the suction port 43a matching the width of the end of the inclined filter 41. This design ensures that large particles can be efficiently recovered.

[0041] Before entering the U-shaped outer shell 1, the raw materials undergo pre-crushing treatment by the crushing gear set 42, reducing the presence of large pieces. Subsequently, the raw materials are graded by an inclined filter screen 41. Fine particles pass smoothly through the filter screen into the U-shaped outer shell 1 for carbonization, while larger particles are trapped by the filter screen and slide down to the lowest end along the inclined filter screen 41. At this time, the blower 433 starts, generating negative pressure in the negative pressure recovery pipe 432 and the flat suction nozzle 431. Because the suction inlet 43a of the flat suction nozzle 431 is directly opposite the end of the inclined filter screen 41 and their widths match, large particles are drawn into the flat suction nozzle 431 under the action of negative pressure and then recovered through the negative pressure recovery pipe 432. This design effectively reduces the amount of large particles entering the carbonization incinerator, further reducing the risk of blockage inside the carbonization incinerator.

[0042] In the description of the embodiments of this application, the technical terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0043] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "set," "equipped with," "connected," and "installed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A carbonization incinerator for activated carbon production, characterized in that, include: U-shaped shell (1), the inner wall of the U-shaped shell (1) is a U-shaped groove with a continuous arc transition, and the top is provided with an open slot; The coaxial reverse double helix conveying mechanism (2) includes: two parallel conveying shafts (21) and opposite helical blades (22) mounted on the shafts, wherein the outer edge of the helical blades (22) maintains a gap with the inner wall of the U-shaped outer shell (1).

2. The carbonization incinerator for active carbon production according to claim 1, characterized in that, The conveying shaft (21) of the double helix conveying mechanism (2) is rotated in the opposite direction through the planetary gearbox (23), and the output shaft of the planetary gearbox (23) is rigidly connected to the two conveying shafts (21) respectively.

3. The carbonization incinerator for activated carbon production according to claim 1, characterized in that, The bottom of the U-shaped outer shell (1) is provided with a flow guide protrusion (11) that matches the rotation direction of the spiral blade (22).

4. The carbonization incinerator for producing activated carbon according to claim 1, characterized by It also includes: a removable top plate assembly (3) covering the open slot of the U-shaped shell (1), the removable top plate assembly (3) including a cover plate (31) hinged to the side wall of the U-shaped shell (1), a dovetail slider (32) disposed at the free end of the cover plate (31) and a dovetail groove (33) disposed on the inner wall of the U-shaped shell (1) where it connects with the dovetail slider (32).

5. The carbonization incinerator for producing activated carbon according to claim 4, characterized in that, The dovetail groove (33) is set on two opposing inner walls that are perpendicular to the conveying direction of the coaxial reverse double helix conveying mechanism (2).

6. The carbonization incinerator for producing activated carbon according to claim 1, characterized by Also includes: The crushing and grading device (4) is set at the top of the feed end of the U-shaped shell (1). The crushing and grading device (4) includes: an inclined filter screen (41), a crushing gear set (42) located above the inclined filter screen (41), and a negative pressure recovery unit (43) with the air inlet set between the inclined filter screen (41) and the crushing gear set (42).

7. The carbonization incinerator for producing activated carbon according to claim 6, characterized by The negative pressure recovery unit (43) includes: a flat suction nozzle (431) connected to the lowest end of the inclined filter (41); a negative pressure recovery pipe (432) connected to the flat suction nozzle (431); and a fan (433) connected to the negative pressure recovery pipe (432).

8. The carbonization incinerator for producing activated carbon according to claim 7, characterized by The lowest end of the inclined filter (41) extends to the flat nozzle (431), the suction port (43a) of the flat nozzle (431) is directly opposite the end of the inclined filter (41), and the width of the suction port (43a) matches the width of the end of the inclined filter (41).

9. The carbonization incinerator for producing activated carbon according to claim 6, characterized by The crushing gear set (42) includes a driving gear (42a) and a driven gear (42b) arranged in an alternating manner.

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