Material scattering device of cement decomposing furnace

Abstract

The invention provides a cement decomposing furnace material scattering device, and relates to the technical field of cement production equipment, the cement decomposing furnace material scattering device comprises an annular material scattering box fixedly arranged on the outer side of the upper portion of a decomposing furnace in a sleeving mode, an annular partition plate is fixedly arranged in the annular material scattering box, and the annular material scattering box is sequentially divided into a material arranging chamber and a material scattering chamber by the annular partition plate from top to bottom; a plurality of communicating holes distributed at equal intervals along the circumference are formed in the annular partition plate, the material arranging chamber is communicated with the material scattering chamber through the communicating holes, and at least one feeding pipe communicated with the material arranging chamber is arranged on the upper portion of the annular material scattering box. The rotary material distributing assembly and the material scattering assembly are matched for cooperative work, so that raw material powder is uniformly dispersed along the circumference of the decomposing furnace, bias flow and non-uniform distribution are avoided, and the contact area of materials and high-temperature flue gas is increased; meanwhile, an airflow field in the furnace is adapted, eddy current and airflow short circuit are inhibited, the material retention time is prolonged, the raw material decomposition rate and the heat exchange efficiency are improved, and energy consumption is reduced.

Description

Technical Field

[0001] This application relates to the field of cement production equipment technology, and more specifically, to a cement decomposition furnace feeding device. Background Technology

[0002] In the precalciner kiln system of cement production, the precalciner is the core equipment for achieving efficient decomposition of raw meal powder. Its working efficiency directly determines the energy consumption level, clinker quality, and environmental emission indicators of cement production. The decomposition effect of raw meal powder in the precalciner depends critically on the contact area, contact uniformity, and residence time between the material and the high-temperature flue gas. As a key transitional device connecting the preheater and the precalciner, the installation position and structural design of the spreading device play a decisive role in the material dispersion effect. Currently, the mainstream installation methods of spreading devices in the industry are mainly divided into two categories: one is to set the spreading device on one side of the upper part of the precalciner (side feeding mode), and the other is to set the spreading device in the middle of the top of the precalciner (top straight feeding mode). However, both of these existing installation methods and corresponding spreading devices have significant defects in practical applications.

[0003] For existing technologies that use a feeding device on one side of the top of the decomposition furnace, the core problems are concentrated in two aspects: insufficient uniformity of material dispersion and flow field interference. First, the feeding device is embedded in the side wall of the decomposition furnace. After being guided by the feeding structure, the material enters the furnace in an obliquely projectile state. Due to the impact of the rising airflow in the furnace and the influence of the material's own gravity, the phenomenon of "side wall deviation" is very likely to occur. The trajectory of the material is prone to deviate to the other side of the furnace, resulting in excessive accumulation of material in some areas, while the material distribution in the central area of ​​the furnace is sparse. This creates an unbalanced state of "local material enrichment and local heat excess", resulting in large fluctuations in the raw material decomposition rate. Some materials are not completely decomposed because they do not come into sufficient contact with the high-temperature flue gas.

[0004] The existing technology of setting up a feeding device in the middle of the top of the decomposition furnace has the main drawbacks of insufficient contact between the material and the flue gas, resulting in high energy consumption. The feeding device in the middle of the top adopts a straight feeding mode, in which the material falls vertically and contacts the rising high-temperature flue gas in the furnace in a co-current state. The relative velocity difference between the two is small (only the difference between the rising velocity of the airflow and the free fall velocity of the material), the contact path is short and the probability of collision is low, which easily forms the phenomenon of "material cluster falling". The material cannot be fully dispersed to various flow fields in the furnace, resulting in excessively high local material concentration and insufficient heat supply. The raw material decomposition rate is usually 8%-15% lower than that of the side feeding mode. To compensate for this defect, it is necessary to increase the combustion temperature in the furnace or extend the residence time of the material in the furnace, which indirectly increases fuel consumption and carbon emissions.

[0005] In summary, both existing mainstream material spreading devices have insurmountable technical defects and cannot simultaneously meet the operational requirements of cement decomposition furnaces, which demand uniform material dispersion and low energy consumption. Therefore, developing a material spreading device for cement decomposition furnaces that can circumvent the aforementioned technical defects has become an urgent technical problem to be solved in this field. Summary of the Invention

[0006] The purpose of this application is to provide a cement decomposition furnace feeding device that can solve the technical problems mentioned in the background art.

[0007] This application provides a cement decomposition furnace feeding device, including an annular feeding box fixedly sleeved on the upper outer side of the decomposition furnace. An annular partition plate is fixedly installed inside the annular feeding box, dividing it from top to bottom into a material handling chamber and a feeding chamber. Multiple connecting holes are evenly spaced along the circumference on the annular partition plate. The material handling chamber is connected to the feeding chamber through the connecting holes. At least one feed pipe connected to the material handling chamber is located at the upper part of the annular feeding box. A material distribution assembly is rotatably installed inside the material handling chamber. A drive assembly for driving the material distribution assembly to rotate is located on one side of the annular feeding box. A feeding assembly is installed inside the feeding chamber. Multiple feeding ports connected to the feeding chamber are evenly spaced along the periphery of the decomposition furnace.

[0008] Furthermore, the fabric assembly includes a fabric cover, an annular plate, and multiple connecting rods. The fabric cover and the annular plate are coaxially rotatably disposed in the material handling chamber, and the annular plate is coaxially surrounding the outer side of the fabric cover. The multiple connecting rods are divided into multiple groups along the circumference of the fabric cover, and the multiple groups of connecting rods are distributed in an annular shape with equal spacing. Each group of connecting rods is fixed between the fabric cover and the annular plate. Two adjacent groups of connecting rods, the outer side wall of the fabric cover, and the inner side wall of the annular plate together form multiple fabric cavities distributed in an annular shape with equal spacing. Each fabric cavity is correspondingly disposed with a connecting hole on the annular partition plate, and the connecting hole is located directly below the annular area between the fabric cover and the annular plate.

[0009] Furthermore, each set of connecting rods has multiple rods arranged at equal intervals along the axial direction of the fabric cover, and multiple breaking rods are fixed at equal intervals between two adjacent connecting rods, with the breaking rods between two adjacent connecting rods being staggered.

[0010] Furthermore, the top of the fabric cover is bent inward to form an annular connecting ring, and an annular support ring and an annular limiting ring are fixed on the inner side wall of the annular material dispensing box. An annular connecting groove is formed between the annular support ring and the inner top wall of the annular material dispensing box. The annular connecting ring is located in the annular connecting groove and is slidably connected to the annular connecting groove. The annular limiting ring is located on the outer side of the annular plate and is slidably connected to the outer side of the annular plate. The bottom of the fabric cover and the annular plate are both slidably connected to the top of the annular partition plate.

[0011] Furthermore, the drive assembly includes a mounting plate, a drive motor, a drive gear, and a ring gear. The drive motor is fixed to the outside of the annular material spreading box via the mounting plate. The drive gear is fixed to the output shaft of the drive motor. The ring gear is fixedly sleeved on the outer peripheral wall of the annular plate. The side wall of the annular material spreading box has a matching clearance opening corresponding to the position of the drive gear. Some teeth of the drive gear pass through the clearance opening and extend into the annular material spreading box, and mesh with the ring gear for transmission.

[0012] Furthermore, a protective cover is fixed to the side wall of the annular material spreading box corresponding to the avoidance opening, the drive motor and the drive gear are located inside the protective cover, and a sealing ring is provided between the bottom of the protective cover and the top of the mounting plate.

[0013] Furthermore, the material spreading assembly includes an inclined ring plate and at least one air inlet pipe. The inclined ring plate is coaxially fixed in the material spreading chamber, and the inner ring edge of the inclined ring plate is inclined downwards towards the inner side of the decomposition furnace at an inclination angle of 30°-60°. The inclined ring plate divides the material spreading chamber axially from top to bottom into a receiving chamber and an air chamber. The receiving chamber is connected to a connecting hole on the annular partition plate. Multiple air jet holes are evenly opened on the inclined ring plate and are horizontally arranged. One end of the air inlet pipe penetrates the side wall of the annular material spreading box and is connected to the air chamber. A flow regulating valve is provided on the air inlet pipe.

[0014] Furthermore, it also includes multiple partition plates evenly distributed along the circumference of the annular feeding box. The partition plates are vertically fixed in the air cavity. The multiple partition plates divide the air cavity into multiple independent air chambers along the circumferential direction, and each air chamber is distributed in a one-to-one correspondence with the feeding port of the decomposition furnace. The number of air inlet pipes is the same as the number of air chambers, and the air inlet pipes correspond one-to-one with the air chambers.

[0015] Furthermore, each of the material dispensing ports is provided with a set of material dispensing components. The material dispensing components include a material dispensing grid and a fixing plate. The material dispensing grid is fixed on the fixing plate, and a set of mounting through holes are symmetrically opened on the fixing plate. The bottom of the annular material dispensing box is provided with an insertion interface adapted to the material dispensing grid and a threaded hole corresponding to the mounting through hole, corresponding to the position of each material dispensing port. The material dispensing grid is inserted into the material dispensing port from bottom to top. The material dispensing components are threadedly fastened to the threaded holes at the bottom of the annular material dispensing box by bolts passing through the mounting through holes of the fixing plate.

[0016] Furthermore, there are four feed pipes, which are arranged at equal intervals.

[0017] The beneficial effects of this invention are:

[0018] This invention utilizes an annular feeding box with circumferentially spaced connecting holes and feeding ports, combined with the synergistic effect of a rotating feeding assembly and a feeding assembly. This allows raw meal powder to be evenly dispersed into the furnace along the circumference of the decomposition furnace, effectively avoiding the material deviation and uneven distribution problems caused by existing side-feeding or top-feeding methods. It also effectively increases the contact area between the raw meal powder and the high-temperature flue gas, promoting full contact between them. At the same time, the annular feeding box and multiple feeding ports are designed to adapt to the upward airflow distribution within the decomposition furnace, suppressing eddies and airflow short-circuiting, extending material residence time, improving raw meal decomposition rate and heat exchange efficiency, and reducing energy loss. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 These are schematic diagrams of the structures in some embodiments of this application;

[0021] Figure 2 These are cross-sectional views of some embodiments of this application;

[0022] Figure 3 This is a schematic diagram of the structure of the fabric assembly in some embodiments of this application;

[0023] Figure 4 This is a schematic diagram of the structure of the bulk material assembly in some embodiments of this application;

[0024] The reference numerals in the attached figures are as follows:

[0025] 1. Decomposition furnace; 2. Annular feeding box; 21. Material handling chamber; 22. Feeding chamber; 23. Annular support ring; 24. Annular limiting ring; 25. Clearance opening; 3. Annular partition plate; 31. Connecting hole; 4. Feed pipe; 5. Material distribution assembly; 51. Material distribution cover; 511. Annular connecting ring; 52. Annular plate; 53. Connecting rod; 6. Drive assembly; 61. Mounting plate; 62. Drive motor; 63. Drive gear; 64. Annular gear ring; 7. Feeding assembly; 71. Inclined ring plate; 711. Jet nozzle; 72. Air inlet pipe; 8. Feeding port; 9. Crushing rod; 10. Protective cover; 11. Receiving chamber; 12. Air chamber; 13. Isolation plate; 14. Bulk material assembly; 141. Bulk material grid; 142. Fixing plate; 15. Mounting through hole. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing 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, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0031] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Specific Implementation

[0032] like Figure 1-3As shown, this application provides a cement decomposition furnace feeding device, including an annular feeding box 2 fixedly sleeved on the upper outer side of the decomposition furnace 1. An annular partition plate 3 is fixedly provided inside the annular feeding box 2, dividing the annular feeding box 2 from top to bottom into a material handling chamber 21 and a feeding chamber 22. The annular partition plate 3 has a plurality of connecting holes 31 evenly distributed along the circumference. The material handling chamber 21 is connected to the feeding chamber 22 through the connecting holes 31. The upper part of the annular feeding box 2 is provided with at least one material handling chamber. The feeding chamber 21 is connected to the feed pipe 4. A rotatable feeding assembly 5 is installed inside the feeding chamber 21. A drive assembly 6 for driving the feeding assembly 5 to rotate is located on one side of the annular feeding box 2. A feeding assembly 7 is installed inside the feeding chamber 22. Multiple feeding ports 8, connected to the feeding chamber 22, are evenly spaced around the periphery of the decomposition furnace 1. In use, the raw material powder conveyed by the preheater enters the feeding chamber 21 of the annular feeding box 2 through the feed pipe 4. The drive assembly 6 drives the feeding assembly 5 to rotate, causing the concentrated raw material powder to move along the feeding chamber 21. The raw material powder is distributed circumferentially, falling through the connecting holes 31 on the annular partition plate 3 into the lower spreading chamber 22. The spreading component 7 inside the spreading chamber 22 guides and disperses the falling raw material powder, which is then conveyed into the decomposition furnace 1 through multiple spreading ports 8 evenly spaced around its perimeter, achieving omnidirectional spreading of the raw material powder along the circumference of the decomposition furnace 1. This is achieved through the annular spreading box 2, the circumferentially spaced connecting holes 31 and spreading ports 8, and the combination of the rotating spreading component 5 and the spreading component 7. Through synergistic effects, the raw meal powder can be evenly dispersed into the furnace along the circumference of the decomposition furnace 1, effectively avoiding the problems of material deviation and uneven distribution caused by existing side single feeding or top feeding. It effectively increases the contact area between the raw meal powder and the high-temperature flue gas, promoting full contact between the raw meal powder and the high-temperature flue gas. At the same time, the design of the annular feeding box 2 and the multiple feeding ports 8 is adapted to the upward airflow field distribution in the decomposition furnace 1, which can suppress eddies and airflow short circuits, extend the material residence time, improve the raw meal decomposition rate and heat exchange efficiency, and reduce energy consumption loss.

[0033] like Figure 2 and Figure 3As shown, the fabric assembly 5 includes a fabric cover 51, an annular plate 52, and multiple connecting rods 53. The fabric cover 51 and the annular plate 52 are coaxially rotatably disposed within the material handling chamber 21, and the annular plate 52 is coaxially arranged around the outer side of the fabric cover 51. The multiple connecting rods 53 are arranged in multiple groups along the circumference of the fabric cover 51, and the multiple groups of connecting rods 53 are distributed in an annular shape with equal spacing. Each group of connecting rods 53 is fixed between the fabric cover 51 and the annular plate 52. Two adjacent groups of connecting rods 53, the outer wall of the fabric cover 51, and the inner wall of the annular plate 52 together form multiple fabric cavities distributed in an annular shape with equal spacing. Each fabric cavity is connected to the annular partition plate 3. Holes 31 are set one-to-one, and the connecting hole 31 is located directly below the annular area between the fabric cover 51 and the annular plate 52. When the fabric cover 51 and the annular plate 52 of the fabric assembly 5 rotate coaxially in the material handling chamber 21, the raw material powder entering the material handling chamber 21 through the feed pipe 4 is guided into the fabric cavity by the rotating connecting rod 53. Through the guiding effect of the fabric cavity, the raw material powder falls down to the corresponding connecting hole 31 on the annular partition plate 3, realizing the circumferential uniform distribution and directional falling of the raw material powder in the material handling chamber 21, effectively avoiding the accumulation or deviation of the raw material powder in the material handling chamber 21, and improving the uniformity of the distribution of the raw material powder along the circumference of the annular spreading box 2.

[0034] like Figure 2 and Figure 3 As shown, each set of connecting rods 53 has multiple rods arranged at equal intervals along the axial direction of the fabric cover 51. Multiple crushing rods 9 are fixed at equal intervals between two adjacent connecting rods 53. The crushing rods 9 between two adjacent connecting rods 53 are staggered. When the fabric assembly 5 drives the connecting rods 53 and the crushing rods 9 to rotate synchronously, the raw material powder will collide and cut with the multi-layer staggered crushing rods 9 during the falling process in the fabric cavity, breaking the agglomerated state. This lays the foundation for the subsequent directional dropping of material in the fabric cavity and the uniform spreading of material by the spreading assembly 7, further increasing the contact area between the raw material powder and the high-temperature flue gas, and helping to improve the raw material decomposition efficiency.

[0035] like Figure 2 and Figure 3 As shown, the top of the fabric cover 51 is bent inward to form an annular connecting ring 511. An annular support ring 23 and an annular limiting ring 24 are fixed on the inner side wall of the annular material dispensing box 2. An annular connecting groove is formed between the annular support ring 23 and the inner top wall of the annular material dispensing box 2. The annular connecting ring 511 is located in the annular connecting groove and is slidably connected to the annular connecting groove. The annular limiting ring 24 is located on the outer side of the annular plate 52 and is slidably connected to the outer side of the annular plate 52. The bottom of the fabric cover 51 and the annular plate 52 are both slidably connected to the top of the annular partition plate 3. Through the setting of the annular connecting groove, the annular connecting ring 511, and the annular limiting ring 24, the fabric assembly 5 is stable when rotating, and eccentricity is avoided during rotation.

[0036] like Figure 2As shown, the drive assembly 6 includes a mounting plate 61, a drive motor 62, a drive gear 63, and an annular gear ring 64. The drive motor 62 is fixed to the outside of the annular material spreading box 2 via the mounting plate 61. The drive gear 63 is fixed to the output shaft of the drive motor 62. The annular gear ring 64 is fixedly sleeved on the outer peripheral wall of the annular plate 52. The side wall of the annular material spreading box 2 has a suitable clearance opening 25 corresponding to the position of the drive gear 63. Some teeth of the drive gear 63 pass through the clearance opening 25 and extend into the annular material spreading box 2, and mesh with the annular gear ring 64 for transmission. The drive motor 62 drives the drive gear 63 to rotate, and the drive gear 63 drives the annular gear ring 64, so that the annular plate 52, together with the fabric cover 51 and the connecting rod 53, rotates stably along the axis of the annular material spreading box 2.

[0037] like Figure 2 As shown, a protective cover 10 is fixed on the side wall of the annular material spreading box 2 at the avoidance opening 25. The drive motor 62 and the drive gear 63 are located inside the protective cover 10. A sealing ring (not shown in the figure) is provided between the bottom of the protective cover 10 and the top of the mounting plate 61. The protective cover 10 is configured to provide protection for the drive motor 62 and the drive gear 63, and to prevent external rainwater from damaging the drive motor 62.

[0038] like Figure 2 As shown, the material spreading assembly 7 includes an inclined ring plate 71 and at least one air inlet pipe 72. The inclined ring plate 71 is coaxially fixed in the material spreading chamber 22, and the inner ring edge of the inclined ring plate 71 is inclined downward towards the inner side of the decomposition furnace 1 at an angle of 30°-60°. The inclined ring plate 71 divides the material spreading chamber 22 axially from top to bottom into a receiving chamber 11 and an air chamber 12. The receiving chamber 11 is connected to the connecting hole 31 on the annular partition plate 3. A plurality of air jet holes 711 are evenly opened on the inclined ring plate 71. The air jet holes 711 are horizontally arranged. One end of the air inlet pipe 72 penetrates the side wall of the annular material spreading box 2 and is connected to the air chamber 12. The device is equipped with a flow regulating valve (not shown in the figure). Specifically, the inclined ring plate 71 has an inclination angle of 35°. The air inlet pipe 72 is connected to a high-pressure air source. After the raw material powder falling through the connecting hole 31 enters the receiving chamber 11, it flows towards the spreading port 8 under the guidance of the inclined ring plate 71. The external high-pressure gas is introduced into the air chamber 12 through the air inlet pipe 72 with the flow regulating valve, and is sprayed out through the horizontal jet holes 711 evenly distributed on the inclined ring plate 71 to form a horizontal airflow, which sweeps and disperses the raw material powder to achieve spreading. The horizontal jet holes 711 and the air chamber 12 cooperate to form a uniform airflow field, which can further break up material agglomeration and improve the uniformity of material dispersion.

[0039] like Figure 2As shown, the cement decomposition furnace 1 feeding device of this application also includes multiple isolation plates 13 evenly distributed along the circumference of the annular feeding box 2. The isolation plates 13 are vertically fixed in the air chamber 12. The multiple isolation plates 13 divide the air chamber 12 into multiple independent air chambers along the circumferential direction, and each air chamber is distributed in a one-to-one correspondence with the feeding port 8 of the decomposition furnace 1. The number of air inlet pipes 72 is the same as the number of air chambers, and the air inlet pipes 72 correspond one-to-one with the air chambers. External high-pressure gas is introduced into the corresponding air chamber through each air inlet pipe 72, and then directionally ejected through the jet holes 711 in the corresponding area on the inclined ring plate 71, so as to realize the independent airflow purging and dispersion of the material at each feeding port 8. The setting of the isolation plates 13 ensures that there is no airflow interference between the air chambers, and ensures the independence and stability of airflow control in each area.

[0040] like Figure 2 and Figure 4 As shown, each feeding port 8 is equipped with a set of material dispersing components 14. The material dispersing components 14 include a material dispersing grid 141 and a fixing plate 142. The material dispersing grid 141 is fixed on the fixing plate 142. A set of mounting through holes 15 are symmetrically opened on the fixing plate 142. The bottom of the annular feeding box 2, corresponding to the position of each feeding port 8, is provided with an insertion interface adapted to the material dispersing grid 141 and a threaded hole corresponding to the mounting through hole 15. The material dispersing grid 141 is inserted into the feeding port 8 from bottom to top. The material dispersing components 14 are bolted through the mounting through holes 15 of the fixing plate 142 and then threadedly fastened to the threaded holes at the bottom of the annular feeding box 2. When the material falls through the feeding port 8, it will be further cut and diverted by the material dispersing grid 141 in the feeding port 8 to complete the end dispersion and further improve the uniformity of material distribution along the circumference of the decomposition furnace 1. The material dispersing components 14 are set by insertion and bolt fastening. The worn material dispersing grid 141 can be disassembled and replaced separately in the later stage, which is convenient for maintenance.

[0041] like Figure 1 As shown, there are four feed pipes 4, which are equally spaced to avoid the material from being concentrated and piled up in the material handling chamber 21 due to a single feed pipe 4. This significantly reduces the material load and the risk of flow deviation of the material handling assembly 5, and further improves the initial uniformity of the raw material powder distribution in the material handling chamber 21, laying the initial material distribution foundation for the subsequent uniform circumferential material handling of the material handling assembly 5.

[0042] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A feeding device for a cement decomposition furnace, characterized in that: The device includes an annular feeding box fixedly fitted onto the outer side of the upper part of the decomposition furnace. An annular partition plate is fixedly installed inside the feeding box, dividing it from top to bottom into a material handling chamber and a feeding chamber. Multiple connecting holes are evenly spaced along the circumference on the partition plate. The material handling chamber is connected to the feeding chamber through these connecting holes. At least one feed pipe connected to the material handling chamber is located at the upper part of the annular feeding box. A material distribution assembly is rotatably mounted inside the material handling chamber. A drive assembly for rotating the material distribution assembly is located on one side of the annular feeding box. A feeding assembly is located inside the feeding chamber. Multiple feeding ports connected to the feeding chamber are evenly spaced along the periphery of the decomposition furnace.

2. The cement decomposition furnace feeding device according to claim 1, characterized in that: The fabric assembly includes a fabric cover, an annular plate, and multiple connecting rods. The fabric cover and the annular plate are coaxially rotatably disposed in the material handling chamber, and the annular plate is coaxially surrounding the outer side of the fabric cover. The multiple connecting rods are divided into multiple groups along the circumference of the fabric cover, and the multiple groups of connecting rods are distributed in an annular shape with equal spacing. Each group of connecting rods is fixed between the fabric cover and the annular plate. Two adjacent groups of connecting rods, the outer side wall of the fabric cover, and the inner side wall of the annular plate together form multiple fabric cavities distributed in an annular shape with equal spacing. Each fabric cavity is corresponding to a connecting hole on the annular partition plate, and the connecting hole is located directly below the annular area between the fabric cover and the annular plate.

3. The cement decomposition furnace feeding device according to claim 2, characterized in that: Each set of connecting rods has multiple rods arranged at equal intervals along the axial direction of the fabric cover. Multiple crushing rods are fixed at equal intervals between two adjacent connecting rods, and the crushing rods between two adjacent connecting rods are staggered.

4. The cement decomposition furnace feeding device according to claim 2, characterized in that: The top of the fabric cover is bent inward to form an annular connecting ring. An annular support ring and an annular limiting ring are fixed on the inner side wall of the annular material dispensing box. An annular connecting groove is formed between the annular support ring and the inner top wall of the annular material dispensing box. The annular connecting ring is located in the annular connecting groove and is slidably connected to the annular connecting groove. The annular limiting ring is located on the outer side of the annular plate and is slidably connected to the outer side of the annular plate. The bottom of the fabric cover and the annular plate are both slidably connected to the top of the annular partition plate.

5. A cement decomposition furnace feeding device according to claim 2, characterized in that: The drive assembly includes a mounting plate, a drive motor, a drive gear, and a ring gear. The drive motor is fixed to the outside of the annular material spreading box via the mounting plate. The drive gear is fixed to the output shaft of the drive motor. The ring gear is fixedly sleeved on the outer peripheral wall of the annular plate. The side wall of the annular material spreading box has a suitable clearance opening corresponding to the position of the drive gear. Some teeth of the drive gear pass through the clearance opening and extend into the annular material spreading box, and mesh with the ring gear for transmission.

6. The cement decomposition furnace feeding device according to claim 5, characterized in that: A protective cover is fixed to the side wall of the annular material spreading box corresponding to the avoidance opening. The drive motor and the drive gear are located inside the protective cover. A sealing ring is provided between the bottom of the protective cover and the top of the mounting plate.

7. The cement decomposition furnace feeding device according to claim 1, characterized in that: The material spreading assembly includes an inclined ring plate and at least one air inlet pipe. The inclined ring plate is coaxially fixed in the material spreading chamber, and the inner ring edge of the inclined ring plate is inclined downward towards the inner side of the decomposition furnace at an angle of 30°-60°. The inclined ring plate divides the material spreading chamber axially from top to bottom into a receiving chamber and an air chamber. The receiving chamber is connected to a connecting hole on the annular partition plate. Multiple air jet holes are evenly opened on the inclined ring plate and are horizontally arranged. One end of the air inlet pipe penetrates the side wall of the annular material spreading box and is connected to the air chamber. A flow regulating valve is provided on the air inlet pipe.

8. A cement decomposition furnace feeding device according to claim 7, characterized in that: It also includes multiple partition plates evenly distributed along the circumference of the annular feeding box. The partition plates are vertically fixed in the air cavity. The multiple partition plates divide the air cavity into multiple independent air chambers along the circumferential direction. Each air chamber is distributed in a one-to-one correspondence with the feeding port of the decomposition furnace. The number of air inlet pipes is the same as the number of air chambers. The air inlet pipes correspond one-to-one with the air chambers.

9. A cement decomposition furnace feeding device according to claim 1, characterized in that: Each of the aforementioned dispensing ports is provided with a set of dispensing components. The dispensing components include a dispensing grid and a fixing plate. The dispensing grid is fixed on the fixing plate, and a set of mounting through holes are symmetrically opened on the fixing plate. The bottom of the annular dispensing box, corresponding to the position of each dispensing port, is provided with an insertion interface adapted to the dispensing grid and a threaded hole corresponding to each of the mounting through holes. The dispensing grid is inserted into the dispensing port from bottom to top. The dispensing components are threadedly fastened to the threaded holes at the bottom of the annular dispensing box by bolts passing through the mounting through holes of the fixing plate.

10. A cement decomposition furnace feeding device according to claim 1, characterized in that: There are four feed pipes, which are arranged at equal intervals.

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