Shaft kiln feeding device with particle size screening and partitioned material supplementing functions

Abstract

The invention relates to the technical field of coal gangue treatment, and particularly discloses a shaft kiln feeding device with particle size screening and partition material supplementing functions, which comprises a kiln body and a sealing cover arranged at the top end of the kiln body, an outer ring cylinder is concentrically fixed in the kiln body positioned below the sealing cover, and a conical material guide ring is arranged at the lower end of the outer ring cylinder; a vertical shaft concentrically extending into the outer ring cylinder is fixed to the center of the sealing cover, a hollow connecting shaft is rotationally arranged on the vertical shaft, a rotating transmission mechanism is connected to the hollow connecting shaft, the lower end of the hollow connecting shaft is connected with a centrifugal rotating disc extending into the outer ring cylinder, and screening holes are formed in the centrifugal rotating disc; a partition material supplementing mechanism is arranged in the outer ring cylinder located under the sieve holes, and a feeding hopper for feeding materials to the center of the centrifugal rotating disc is arranged on the sealing cover; through screening and stacking of crushed coal gangue, it can be guaranteed that the ventilation resistance of materials in the whole kiln body is more consistent, and then the product quality after subsequent coal gangue decarburization sintering is effectively guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal gangue treatment, and particularly discloses a vertical kiln feeding device with particle size screening and partitioned feeding. BACKGROUND

[0002] Decarburization calcination of coal gangue is an important way to realize resource utilization. The existing decarburization calcination of coal gangue mainly has two ways: vertical kiln calcination and belt sintering machine calcination. At present, the vertical kiln used for coal gangue calcination is basically improved based on the cement kiln. Although it has the basic function of coal gangue decarburization calcination, the feeding device is only simply fed from the top of the kiln, and cannot perform special feeding according to the sintering characteristics of coal gangue, resulting in some problems in the subsequent coal gangue sintering process.

[0003] The utility model patent with the application number 202121928957.4 discloses a lime vertical kiln feeding distributor, which comprises a distributor support, a feeding hopper installed on the top of the distributor support, an upper feeding pipe provided through the bottom end of the feeding hopper, a gravity flap valve provided at the end of the upper feeding pipe, a sleeve installed on the outer surface of the upper feeding pipe, a lower feeding pipe provided below the sleeve, a first bevel gear provided on the outer surface of the lower feeding pipe, and a second bevel gear meshed with one side of the first bevel gear. The lime vertical kiln feeding distributor disclosed in the utility model patent can change the orientation of the feeding basket by rotating the bevel gears during operation, so that the material can be rotated and adjusted along the kiln surface at 360°, and the material can be uniformly distributed on every part of the kiln surface. However, when it is used for coal gangue decarburization calcination, it cannot guarantee uniform decarburization calcination of coal gangue, because the particle sizes of the coal gangue fragments are not uniform, and after the coal gangue is added into the vertical kiln, the four corners of the kiln body cannot be effectively filled due to the proximity of the coal gangue to the kiln wall, resulting in that the material ventilation resistance of the four corners of the kiln body is much lower than that of the center. Therefore, the ventilation effect of the material at the four corners is better during the sintering process, and the decarburization calcination speed of the coal gangue at the four corners is higher than that of the coal gangue at the center, which further leads to excessive calcination of the coal gangue at the four corners and incomplete calcination of the coal gangue at the center, seriously affecting the product quality after sintering. Based on this, the present application proposes a vertical kiln feeding device with particle size screening and partitioned feeding, which screens and discharges the coal gangue during the feeding process and then performs partitioned feeding, so as to try to keep the ventilation effect consistent during the decarburization calcination of the material pile, and thus improve the product quality after sintering. SUMMARY

[0004] The purpose of the present application is to provide a vertical kiln feeding device with particle size screening and partitioned feeding, so as to solve the technical problems and deficiencies existing in the lime kiln feeding distributor during the use for coal gangue decarburization calcination.

[0005] The present application is realized by the following technical solutions: The utility model provides a kind of vertical kiln feeding device with particle size screening and zoned feeding, including kiln body and the cover being set in the top of kiln body, concentrically fixed in the kiln body below the cover outer ring cylinder, the lower end of outer ring cylinder is provided with the taper guide ring that is inverted circular platform and is contracted to middle, the center of the cover is fixed with vertical shaft that extends into outer ring cylinder, hollow connecting shaft is rotatably arranged on vertical shaft, rotating transmission mechanism is connected on hollow connecting shaft, the lower end of hollow connecting shaft is connected with centrifugal disc that extends into outer ring cylinder, and sieve hole is opened on centrifugal disc, zoned feeding mechanism is arranged in outer ring cylinder directly below the sieve hole, cover is provided with feeding hopper that feeds to the center of centrifugal disc. The zoned feeding mechanism includes inner ring cylinder and sleeve concentrically arranged in outer ring cylinder, the sleeve is fixed on the outer circular surface of vertical shaft, and a plurality of right trapezoidal partition plates are uniformly arranged between the inner ring cylinder and the sleeve, the lower end of each adjacent two partition plates is rotatably connected with a sector-shaped bottom plate, the vertical shaft is provided with a driving mechanism capable of independently driving the sector-shaped bottom plate to rotate, thereby opening or sealing the bottom of the sector-shaped temporary storage area formed between two partition plates.

[0006] As a further arrangement of the above scheme, vertical sliding holes radially aligned with each sector-shaped temporary storage area are uniformly opened on the vertical shaft, and an axial slot communicating with the bottom of each vertical sliding hole is opened at the lower end of the vertical shaft, the driving mechanism includes a lifting bar slidingly arranged in each vertical sliding hole, the lower end of each lifting bar is rotatably connected with a movable connecting rod extending out of the axial slot and connected with the corresponding sector-shaped bottom plate, and the top end of each lifting bar extending out of the vertical sliding hole is connected with a telescopic device fixed on the upper surface of the cover.

[0007] As a further arrangement of the above scheme, the radially inner ends of the sector-shaped bottom plates are rotatably connected between two adjacent partition plates by a pin shaft.

[0008] As a further arrangement of the above scheme, the rotating transmission mechanism includes a rotating transmission assembly composed of a worm gear and a worm arranged on the hollow connecting shaft, and the outer end of the worm in the rotating transmission assembly is connected with a rotating motor.

[0009] As a further arrangement of the above scheme, the outer circular surface of the outer ring cylinder is connected with a plurality of radial links, and the outer ends of the radial links are collectively connected with a ring frame fixed on the inner wall of the kiln body.

[0010] As a further arrangement of the above scheme, the diameter of the sieve hole opened on the centrifugal disc is set to be between 10-30 mm, and a dredging mechanism is arranged on the outer ring cylinder, which can move radially and dredge the sieve hole on the centrifugal disc online.

[0011] As a further arrangement of the above-mentioned scheme, the dredging mechanism comprises a radial slot hole arm connected with the outer ring cylinder and arranged outside the kiln body, a moving strip is slidingly arranged in the radial slot hole arm, a tooth surface is arranged on the lower surface of the radial outer half of the moving strip, and a steel brush wire is arranged on the lower surface of the radial inner half of the moving strip, an adjusting motor is installed on the radial slot hole arm outside the kiln body, and a gear meshing with the tooth surface is arranged on the adjusting motor.

[0012] As a further arrangement of the above-mentioned scheme, two feeding hoppers are arranged, the two feeding hoppers are arranged in mirror symmetry, and the lower end of each feeding hopper is arranged inclined towards the center of the centrifugal disc.

[0013] The disclosed vertical kiln feeding device is used in the coal gangue decarburization sintering process, coal gangue fragments are fed to the center of the centrifugal disc through the feeding hopper, the centrifugal force of the rotating centrifugal disc pushes the coal gangue fragments gathered at the center to the periphery, the coal gangue fragments are separated into coarse and fine materials through the sieve hole during the movement, the coal gangue fine material directly falls into the partitioned feeding mechanism through the sieve hole, and the coal gangue coarse material is thrown from the periphery of the centrifugal disc, then is blocked by the outer ring cylinder and guided by the conical guide ring, so that the falling coal gangue coarse material is discharged to the center of the vertical kiln, and a material pile with high middle and low periphery is formed on the kiln surface.

[0014] After the coal gangue fragments added in the feeding head reach the set amount, the feeding is stopped, then all the telescopic devices in the driving mechanism are controlled to be synchronously elongated, so that all the lifting strips are synchronously pulled upward, then all the sector bottom plates at the bottom of the partitioned feeding mechanism are opened through the action of the movable connecting rod, the previously collected coal gangue fragments slide along the upper surface of the sector bottom plate to the periphery after the opening, and finally fall on the periphery of the kiln surface material pile to form a mixed material of coal gangue coarse material in the middle and coarse material + fine material in the periphery, the mixed material increases the material ventilation resistance of the kiln wall, so that the ventilation resistance of the coal gangue material in the periphery of the kiln wall and the ventilation resistance of the coal gangue material in the center of the kiln body are as consistent as possible, and the uniformity of the subsequent coal gangue decarburization calcination is ensured.

[0015] In addition, during the subsequent coal gangue decarburization sintering process, when the coal gangue in one or more directions collapses due to too fast sintering speed and needs to be replenished, the corresponding telescopic device can be controlled to be elongated by the operator, so that the bottom of the corresponding sector temporary storage area is opened, so that the coal gangue fine material is timely supplemented to the corresponding position, and the sector temporary storage area is sealed after the supplement is completed, so that the dynamic partitioned feeding is completed.

[0016] Finally, after the kiln is operated for a period of time and then stopped, the adjusting motor is actively controlled to run, and then the moving strip is moved radially inward along the radial slot arm under the meshing transmission of the gear and the tooth surface, so that one end of the steel brush wire is moved to the top of the centrifugal disc and is in contact with the centrifugal disc, and then the rotating transmission mechanism is started to make the centrifugal disc run idly. In the rotating process, the steel brush wire can dredge the originally blocked sieve holes, so that the long-term stable material screening effect of the centrifugal disc is ensured.

[0017] Compared with the prior art, the present application has the following beneficial effects: The vertical kiln feeding device disclosed by the present application can make the coal gangue fragments move from the center of the centrifugal disc to the periphery through centrifugal force in the feeding process, and the coal gangue coarse and fine materials are screened through the sieve holes in the movement process. The fine materials screened fall into the partitioned feeding mechanism for temporary storage, and the coarse materials screened fall directly to the center of the vertical kiln to form a material pile, and then the partitioned feeding mechanism is opened to spread the fine materials to the periphery for feeding. The screening and stacking of the coal gangue fragments can ensure that the ventilation resistance of the material in the entire kiln body is more consistent, thereby effectively ensuring the product quality after the subsequent coal gangue decarbonization and sintering.

[0018] The partitioned feeding mechanism in the present application can also open the fan-shaped bottom plate at the bottom of the corresponding orientation fan-shaped temporary storage area according to the real-time calcination condition in the vertical kiln during the subsequent decarbonization and sintering process, so as to timely supplement the coal gangue fine materials stored in the fan-shaped temporary storage area to some positions that appear to be collapsed or sunken, thereby further ensuring the consistency of the coal gangue material layer during the decarbonization and sintering process of the coal gangue. The structure design is simple and practical, and can quickly and effectively solve the problems existing in the current decarbonization and sintering process of the coal gangue. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0020] Figure 1 It is an external three-dimensional structure diagram of the present application. Figure 2 It is an internal planar structure diagram of the present application. Figure 3 It is a three-dimensional structure diagram of the outer ring cylinder, centrifugal disc, feeding hopper and the like in the present application. Figure 4 It is a partial cross-sectional structure diagram of the partitioned feeding mechanism in the present application. Figure 5 It is a schematic diagram of the three-dimensional structure of the transmission assembly, centrifugal rotating disc and the like in the application; Figure 6 It is a schematic diagram of the three-dimensional structure of the partitioned feeding mechanism in the application; Figure 7 It is a schematic diagram of the internal structure of the vertical shaft cross section in the application; Figure 8 It is a schematic diagram of the three-dimensional structure of the moving strip, adjusting motor, gear and the like in the application. DETAILED DESCRIPTION

[0021] In order to enable personnel in the technical field to better understand the scheme of the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0022] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described below with reference to the accompanying drawings and in combination with the embodiments. Figures 1-8 The present application will be described in detail below. Embodiment 1

[0023] Embodiment 1 discloses a vertical kiln feeding device with particle size screening and partitioned feeding. The following will be described in combination with the entire vertical kiln. Referring to FIG. 1, the vertical kiln comprises a kiln body 1, a cover 2 is arranged at the top end of the kiln body 1, a ring frame 3 is fixed to the inner wall of the kiln body 1 below the cover 2, an outer ring cylinder 5 is fixedly connected to the inner circle of the ring frame 3 through a plurality of radial connecting rods 4, and a tapered guide ring 6 in the shape of an inverted circular truncated cone is arranged at the lower end of the outer ring cylinder 5. Figures 1-2 Referring to FIG. 2, the cover 2 is fixedly provided with a vertical shaft 7 extending into the inside of the outer ring cylinder 5, a hollow connecting shaft 8 is rotatably connected to the vertical shaft 7 below the cover 2, the lower end of the hollow connecting shaft 8 is provided with a centrifugal rotating disc 9 extending into the upper end of the inner cavity of the outer ring cylinder 5, and a rotary transmission assembly 10 is further connected to the upper end of the hollow connecting shaft 8. The rotary transmission assembly 10 adopts a transmission mode of a worm and a gear, and a rotary motor 11 is connected to the outer end of the worm in the rotary transmission assembly 10. In addition, a certain distance is left between the centrifugal rotating disc 9 and the inner wall of the outer ring cylinder 5, so that the coal gangue coarse material falling from the upper surface of the centrifugal rotating disc 9 can fall through the annular gap between the two, and then be guided by the tapered guide ring 6, so that the coal gangue coarse material can be accumulated to the center line at the bottom of the kiln body 1.

[0024] Figures 3-5 Referring to FIG. 3, the cover 2 is fixedly provided with a vertical shaft 7 extending into the inside of the outer ring cylinder 5, a hollow connecting shaft 8 is rotatably connected to the vertical shaft 7 below the cover 2, the lower end of the hollow connecting shaft 8 is provided with a centrifugal rotating disc 9 extending into the upper end of the inner cavity of the outer ring cylinder 5, and a rotary transmission assembly 10 is further connected to the upper end of the hollow connecting shaft 8. The rotary transmission assembly 10 adopts a transmission mode of a worm and a gear, and a rotary motor 11 is connected to the outer end of the worm in the rotary transmission assembly 10. In addition, a certain distance is left between the centrifugal rotating disc 9 and the inner wall of the outer ring cylinder 5, so that the coal gangue coarse material falling from the upper surface of the centrifugal rotating disc 9 can fall through the annular gap between the two, and then be guided by the tapered guide ring 6, so that the coal gangue coarse material can be accumulated to the center line at the bottom of the kiln body 1.

[0025] ​The partition feeding mechanism 12 is fixedly connected to the vertical shaft 7 below the centrifugal turntable 9 and is located inside the outer ring cylinder 5. A large number of sieve holes 901 are arranged on the centrifugal turntable 9 directly above the partition feeding mechanism 12, and the diameter of the sieve holes 901 is set to be between 10-30 mm. Two mirror-symmetrically arranged feeding hoppers 13 are installed on the cover 2, and the lower end of each feeding hopper 13 is inclined towards the center of the centrifugal turntable 9, so that the crushed coal gangue materials are respectively fed into the two sides of the center of the upper surface of the centrifugal turntable 9 from the two feeding hoppers 13, and then the centrifugal turntable 9 is driven to rotate at a set speed by the rotary transmission assembly 10 and the rotary motor 11. During the rotation of the centrifugal turntable 9, the centrifugal force can make the coal gangue materials move outward on the upper surface of the centrifugal turntable 9. During the movement of the coal gangue materials on the upper surface of the centrifugal turntable 9, some small-particle-size coal gangue fines can directly fall into the inside of the partition feeding mechanism 12 through the sieve holes 901, and large-particle-size coal gangue coarse materials that are not sieved are thrown from the upper surface of the centrifugal turntable 9, and then, through the joint action of the outer ring cylinder 5 and the conical guide ring 6, the coal gangue coarse materials can be accumulated to the center line at the bottom of the kiln body 1.

[0026] Reference is made to the accompanying drawings Figure 4 and the accompanying drawings Figure 6 The partition feeding mechanism 12 includes an inner ring cylinder 121 concentrically arranged in the outer ring cylinder 5, a sleeve 122 fixedly welded to the vertical shaft 7 at the center of the inner ring cylinder 121, and a plurality of right trapezoidal partition plates 123 uniformly welded between the inner ring cylinder 121 and the sleeve 122 in the circumferential direction, so that the inner cavity of the inner ring cylinder 121 is divided into a plurality of fan-shaped temporary storage areas 120 under the action of the partition plates 123. A fan-shaped bottom plate 124 adapted to each two adjacent partition plates 123 is arranged between the lower ends of the two adjacent partition plates 123, and the radial inner ends of the fan-shaped bottom plate 124 are rotatably connected to the two adjacent partition plates 123 through pin shafts, so that the partition plates 123 can open or seal the bottom of the corresponding fan-shaped temporary storage area 120.

[0027] Reference is made to the accompanying drawings Figure 4 and the accompanying drawings Figure 7 A vertical sliding hole 701 radially aligned with each fan-shaped temporary storage area 120 is arranged in an annular array on the vertical shaft 7, and an axial slot 702 communicating with the bottom of each vertical sliding hole 701 is uniformly arranged on the outer circumferential surface of the lower end of the vertical shaft 7. An elevating bar 703 with the top extending out of the vertical shaft 7 is slidably inserted into each vertical sliding hole 701, and a movable connecting rod 704 connected to the corresponding fan-shaped bottom plate 124 is rotatably connected to the lower end of each elevating bar 703.

[0028] Meanwhile, a radial outward extending protrusion 705 is connected to the top of each lifting bar 703, and a plurality of telescopic devices 13 are uniformly arranged on the upper surface of the cover 2 surrounding the vertical shaft 7, and the telescopic ends of the telescopic devices 13 are connected to the corresponding protrusions 705. The telescopic device 13 can be a pneumatic cylinder or a hydraulic cylinder. When the material is added in the partition, the corresponding telescopic device 13 can be controlled to extend or shorten, so that the corresponding lifting bar 703 moves upward or downward along the vertical sliding hole 701, and then the corresponding sector-shaped bottom plate 124 is rotated around the radial inner end pin shaft through the action of the movable connecting rod 704, so that the bottom of the sector-shaped temporary storage area is opened, and the opened sector-shaped bottom plate 124 is in a radial outward inclined state, thereby playing a guiding role and guiding the material in the corresponding sector-shaped temporary storage area 120 to the circumferential outside of the corresponding direction, so as to compensate for the area of the material kiln surface in the middle and lower parts of the vertical kiln 1.

[0029] In the operation process of the vertical kiln feeding device disclosed in Embodiment 1, the crushed coal gangue material is simultaneously added from both sides to the center of the centrifugal disc 9 through the two feeding hoppers 13, and the centrifugal disc 9 rotates around the vertical shaft 7 at a set speed under the action of the rotating transmission assembly 10 and the rotating motor 11. In the rotating process, the coal gangue material at the center moves to the periphery, and then some coal gangue fine materials with a particle size smaller than the hole diameter of the sieve hole 901 fall into the partition material supplementing mechanism 12 at the bottom through the sieve hole, while the coal gangue coarse materials with a particle size greater than the hole diameter of the sieve hole 901 are thrown from the periphery of the centrifugal disc 9, and after being thrown, they are jointly acted on by the outer ring cylinder 5 and the conical material guiding ring 6, so that the coal gangue coarse materials are accumulated to the center line at the bottom of the kiln body 1, and due to the accumulation characteristics of the bulk materials, the materials inside the kiln body are accumulated in a shape of high in the middle and low at the periphery.

[0030] When the coal gangue fine materials received in the partition material supplementing mechanism 12 are almost filled, all the telescopic devices 13 are started to move the lifting bars 703 upward, and then the sector-shaped bottom plates 124 at the bottom of all the sector-shaped temporary storage areas 120 are opened through the pulling action of the movable connecting rod 704. After being opened, the coal gangue fine materials are guided by the sector-shaped bottom plates 124 and are put into the periphery of the material pile inside the kiln body, so as to fill and flatten the pores between the coal gangue coarse materials and the kiln wall, and ensure that the ventilation effect of the entire material layer in the subsequent calcination process is as same as possible.

[0031] During the subsequent calcination process, the material collapse situation inside the kiln body 1 can be obtained in real time by using an infrared thermometer or camera installed on the top of the kiln body 1. When the material in a certain position collapses due to excessive calcination, the corresponding telescopic device 13 can be independently controlled to open the bottom of the fan-shaped temporary storage area 120 corresponding to that position, so as to replenish the fine coal gangue material to the corresponding position in a timely manner. After replenishment, the bottom of the fan-shaped temporary storage area 120 is sealed, and then the fine coal gangue material in the inner ring cylinder 121 above the fan-shaped temporary storage area 120 can fall into it in a timely manner for replenishment, ensuring that the partitioned feeding mechanism 12 can effectively feed different areas inside the kiln body 1, and ensuring that the material layer thickness and ventilation effect are kept as consistent as possible. Example 2

[0032] Example 2 discloses a vertical kiln feeding device that is further improved based on the technical solution in Example 1. The similarities between it and Example 1 will not be described again.

[0033] Reference Appendix Figure 1 Appendix Figure 3 and attached Figure 8 A radially extending radial slotted arm 14 is connected to the outer ring cylinder 5 located above the centrifugal turntable 9. A movable bar 15 is slidably positioned in the radial slotted arm 14. A toothed surface 151 is provided on the lower surface of the radially outer half of the movable bar 15, and a large number of steel brush bristles 152 are provided on the lower surface of the radially inner half of the movable bar 15.

[0034] In addition, an adjusting motor 16 is installed on the radial slot arm 14 on the outer side of the kiln body 1. A gear 161 meshing with the tooth surface 151 is provided on the motor shaft of the adjusting motor 16. By controlling the forward and reverse rotation of the adjusting motor 16, and under the meshing transmission of the gear 161 and the tooth surface 151, the moving bar 15 can move radially along the radial slot arm 14. When the moving bar 15 moves radially inward to the innermost end, the steel brush 152 on its lower surface can act on the upper surface of the centrifugal turntable 9. Then, the centrifugal turntable 9 is driven to rotate idling by the rotary transmission assembly 10 and the rotary motor 11. During its idling, the steel brush 152 can be used to unclog and clean the screen holes 901 opened on the upper surface of the centrifugal turntable 9, ensuring the long-term screening effect of the centrifugal turntable 9 on coal gangue materials. When the moving bar 15 moves radially outward to its outermost end, the steel brush bristles 152 can be completely retracted into the radial slot arm 14, thus avoiding obstruction of the coarse coal gangue material centrifugally ejected.

[0035] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vertical kiln feeding device with particle size screening and zoned feeding, comprising a kiln body and a cover arranged at the top end of the kiln body, characterized in that, The outer ring cylinder is fixed concentrically in the kiln body below the cover, the lower end of the outer ring cylinder is provided with a tapered material guiding ring which is tapered and in the shape of an inverted circular truncated cone, a vertical shaft is fixed concentrically in the cover and extends into the outer ring cylinder, a hollow connecting shaft is rotatably arranged on the vertical shaft, a rotary transmission mechanism is connected to the hollow connecting shaft, a centrifugal rotating disc extends into the outer ring cylinder from the lower end of the hollow connecting shaft, and sieve holes are formed in the centrifugal rotating disc, a partitioned material supplementing mechanism is arranged in the outer ring cylinder directly below the sieve holes, and a feeding hopper is arranged on the cover and used for feeding materials to the center of the centrifugal rotating disc. The partitioned material supplementing mechanism comprises an inner ring cylinder and a sleeve which are arranged concentrically in the outer ring cylinder, the sleeve is fixed to the outer circumferential surface of the vertical shaft, a plurality of straight trapezoidal partition plates are arranged circumferentially and uniformly between the inner ring cylinder and the sleeve, the lower end of each two adjacent partition plates is rotatably connected to a sector-shaped bottom plate, and a driving mechanism is arranged on the vertical shaft and used for independently driving the sector-shaped bottom plate to rotate so as to open or seal the bottom of the sector-shaped temporary storage area formed between the two partition plates.

2. The vertical kiln feeding device with particle size screening and zoned feeding according to claim 1, characterized in that, Vertical sliding holes are uniformly formed in the vertical shaft and radially aligned with each sector-shaped temporary storage area, an axial slot is formed in the lower end of the vertical shaft and communicates with the bottom of each vertical sliding hole, the driving mechanism comprises a lifting strip which is slidably arranged in each vertical sliding hole, the lower end of each lifting strip is rotatably connected to a movable connecting rod which extends out of the axial slot and is connected to the corresponding sector-shaped bottom plate, and the top end of each lifting strip extending out of the vertical sliding hole is connected to an expansion device which is fixed to the upper surface of the cover.

3. The raw meal feeding device for vertical kiln with particle size screening and zoning feeding according to claim 2, characterized in that, The radially inner ends of the sector-shaped bottom plate are rotatably connected to two adjacent partition plates through a pin.

4. The vertical kiln charging device with particle size screening and zoned feeding according to claim 1, characterized in that, The rotary transmission mechanism comprises a rotary transmission assembly which is arranged on the hollow connecting shaft and comprises a worm and a worm wheel, and the outer end of the worm is connected to a rotary motor.

5. The vertical kiln feeding device with particle size screening and zoned feeding according to claim 1, characterized in that, The outer circumferential surface of the outer ring cylinder is connected to a plurality of radial connecting rods, the outer ends of the radial connecting rods are jointly connected to a ring frame which is fixed to the inner wall of the kiln body.

6. The vertical kiln charging device with particle size screening and zoned feeding according to claim 1, characterized in that, The sieve holes formed in the centrifugal rotating disc have a diameter of 10-30 mm, and a dredging mechanism is arranged on the outer ring cylinder and used for moving radially and dredging the sieve holes on the centrifugal rotating disc.

7. The feeding device for vertical kiln with particle size screening and zoned feeding according to claim 6, characterized in that, The dredging mechanism comprises a radial slot hole arm which is connected to the outer ring cylinder and extends out of the kiln body, a moving strip is slidably arranged in the radial slot hole arm, the radially outer half of the moving strip is provided with a tooth surface on the lower surface, the radially inner half of the moving strip is provided with a steel brush wire on the lower surface, an adjusting motor is arranged on the radial slot hole arm outside the kiln body, and the adjusting motor is provided with a gear which is engaged with the tooth surface.

8. The vertical kiln charging device with particle size screening and zoned feeding according to claim 1, characterized in that, Two feeding hoppers are arranged, the two feeding hoppers are arranged in mirror symmetry, and the lower end of each feeding hopper is arranged to be inclined towards the center of the centrifugal rotating disc.

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