Feeding device of heavy calcium carbonate calcining furnace

Abstract

The invention relates to the technical field of heavy calcium carbonate feeding, in particular to a feeding device of a heavy calcium carbonate calcining furnace. Comprising a base, a supporting frame is fixedly connected to the base, the supporting frame is fixedly connected with a fixing frame and a material injection shell, the material injection shell is rotationally connected and communicated with a material dispersing shell, the material dispersing shell is connected with a rotary furnace in an inserted mode, the material injection shell, the material dispersing shell and the rotary furnace are sequentially communicated, the material injection shell is rotationally connected with a rotating shaft, and the rotating shaft is fixedly connected with the rotating shaft. The rotating shaft is fixedly connected with a valve plate, and the material scattering shell is provided with a material spreading unit. The material spreading unit comprises a rotating frame, the rotating frame is rotationally connected into the material dispersing shell, the rotating frame is fixedly connected with a first telescopic rod, and a material spreading roller is arranged at the telescopic end of the first telescopic rod. The raw materials to be calcined are spread through the cooperation of the spreading roller and the dispersing shell, so that the raw materials enter the rotary furnace after being effectively dispersed, the possibility of caking of the raw materials is reduced, and the subsequent calcining effect of the raw materials is improved.

Description

Technical Field

[0001] The invention relates to the technical field of heavy calcium carbonate feeding, in particular to a feeding device for a heavy calcium carbonate calcining furnace. Background Art

[0002] The high-temperature calcination process for ground calcium carbonate (GCC) is a key preparation technology in the modern chemical industry. It is primarily used to convert GCC (characterized by a high-density, large-particle crystal structure, chemically formulated as CaCO₃) obtained through deep purification of natural calcite concentrate into highly reactive calcium oxide and its derivative functional materials. This thermochemical conversion process utilizes a precisely controlled rotary kiln system to controllably decompose the raw material within a specific thermal decomposition temperature range (typically 900-1200°C), prompting the following gas-solid phase reaction: CaCO₃(s) → CaO(s) + CO₂(g)↑, thereby achieving phase transition and reconfiguring surface properties.

[0003] In the feed control link of the calcium carbonate calcining process, the existing system's heavy calcium carbonate particle (hereinafter referred to as raw material) dispersion mechanism has significant room for optimization. The current process uses a pipeline to directly inject raw material particles into the feed bin at the rear end of the rotary kiln. Due to the lack of a pre-dispersion device, the raw material easily forms a pile under the action of gravity. Although the kiln body promotes axial migration of the raw material through the synergistic effect of a specific inclination angle and rotation speed, when the raw material contains agglomerates, relying solely on the shear force of the kiln rotation is difficult to achieve effective deagglomeration, resulting in the following process defects: 1. The accumulation of raw materials forms an insulating layer, which reduces the efficiency of heat gradient conduction from the kiln head to the kiln tail; 2. Uneven dispersion of raw materials blocks the CO2 escape channel, affecting the calcination reaction kinetics.

[0004] These problems ultimately lead to unstable quality phenomena such as fluctuations in the activity of the product calcium oxide and excessive free calcium oxide content, which significantly affect the quality of calcium oxide produced after calcining the raw materials. Summary of the Invention

[0005] In order to overcome the above-mentioned shortcomings, the present invention provides a charging device for a heavy calcium carbonate calcining furnace.

[0006] The technical solution of the present invention is: a feeding device for a heavy calcium carbonate calcining furnace, comprising a base, a support frame fixedly connected to the base, a fixed frame and a material injection shell fixedly connected to the support frame, the material injection shell rotatably connected and connected to a bulk material shell, the bulk material shell and the rotary kiln are plugged into each other, the material injection shell and the bulk material shell are sequentially connected to the rotary kiln, the material injection shell is rotatably connected to a rotating shaft, the rotating shaft is fixedly connected to a valve plate, the support frame is fixedly connected to a motor, the output shaft of the motor is fixedly connected to the rotating shaft, and the bulk material shell is provided with a material spreading unit; The material spreading unit includes a rotating frame, which is rotatably connected to the bulk material shell. The rotating frame is fixed with a first telescopic rod, and the telescopic end of the first telescopic rod is provided with a material spreading roller. The rotating shaft is provided with a flattening mechanism for gradually flattening the heavy calcium carbonate.

[0007] Furthermore, the flattening mechanism includes a first cylinder, which is fixed to the rotating shaft. The telescopic end of the first cylinder is rotatably connected to a rotating block, and the rotating block is fixed to a variable diameter roller. The variable diameter roller is frustum-shaped, and its maximum diameter is equal to the diameter of the spreading roller. The diameter of the variable diameter roller gradually increases from the side close to the injection shell to the side away from the injection shell, and the variable diameter roller is fixed to the spreading roller.

[0008] Furthermore, the variable diameter roller is provided with grooves distributed at intervals.

[0009] Furthermore, the width of the grooves distributed at intervals on the variable diameter roller decreases in sequence from the side away from the spreading roller to the side close to the spreading roller.

[0010] Furthermore, it also includes an anti-sticking mechanism for dispersing heavy calcium carbonate, the anti-sticking mechanism is arranged on the rotating shaft, the anti-sticking mechanism includes a first power member with a mirror distribution, the first power members with a mirror distribution are all arranged on the rotating shaft, and the first power members with a mirror distribution are commonly fixed with an anti-sticking plate through a mounting rod.

[0011] Furthermore, the thickness of the anti-sticking plate gradually decreases from a side close to the injection shell to a side away from the injection shell.

[0012] Furthermore, it also includes a second power member, which is arranged on the rotating shaft. The second power member is fixedly connected to a second telescopic rod, and a material retention roller is arranged on the second telescopic rod.

[0013] Furthermore, the rotating shaft is rotatably connected to a second cylinder, and a telescopic end of the second cylinder is rotatably connected to the material retention roller.

[0014] Furthermore, it also includes a preheating mechanism for step-by-step heating of heavy calcium carbonate, the preheating mechanism is arranged on the fixed frame, the preheating mechanism includes an air pump, the air pump is fixed to the fixed frame through a mounting frame, a gas mixing chamber is provided in the side wall of the bulk shell, the support frame is fixed with spaced-apart transfer shells, one of the transfer shells is located outside the rotary kiln, and the other transfer shells are located outside the bulk shell, the air inlet of the air pump is connected to the transfer shell located outside the rotary kiln through a pipe, the air outlet of the air pump is connected to the transfer shell located outside the bulk shell and close to the fixed frame through a pipe, the transfer shell is rotatably connected with a rotating ring, and the spaced-apart rotating rings are respectively connected to the rotary kiln and the gas mixing chamber through pipes.

[0015] Furthermore, an air injection cavity is provided on the injection shell, and the air injection cavity is connected to an external air supply system through a pipeline, and the air injection cavity is connected to the gas mixing cavity through evenly distributed through holes.

[0016] The beneficial effects of the present invention are as follows: the present invention spreads the raw materials to be calcined by cooperating with the spreading roller and the bulk material shell, so that the raw materials are effectively dispersed and enter the rotary kiln, reducing the possibility of the raw materials agglomerating, thereby improving the subsequent calcination effect of the raw materials; by cooperating with the reducing roller and the groove, the raw materials are intermittently relaxed when they are spread, thereby reducing the probability of the raw materials agglomerating during the spreading process; by cooperating with the anti-sticking plate and the bulk material shell, the raw materials are turned over during the spreading process, further reducing the probability of the raw materials agglomerating during the spreading process, thereby improving the dispersion of the raw materials and improving the subsequent calcination effect; by performing gas mixing in the mixing chamber, the temperature of the bulk material shell changes in a step-by-step manner, that is, the raw materials will be preheated and heated synchronously during the movement in the bulk material shell, so as to reduce the moisture content of the raw materials during calcination, thereby improving the subsequent calcination effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the internal structure of the bulk shell of the present invention; Figure 3 This is a sectional view of the three-dimensional structure of the injection shell and the bulk shell of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the rotating frame and the first telescopic rod of the present invention; Figure 5 This is a schematic diagram of the three-dimensional structure of the material retention roller and the second cylinder of the present invention; Figure 6 Schematic diagram of the three-dimensional structure of the second power member and the second telescopic rod of the present invention; Figure 7 Exploded view of the spreading roller and the anti-sticking plate of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the bulk material shell and the valve plate of the present invention.

[0018] In the accompanying drawings: 1-base, 2-support frame, 3-rotary kiln, 4-fixed frame, 5-injection shell, 6-bulk material shell, 7-rotating shaft, 8-valve plate, 9-motor, 10-rotating frame, 11-first telescopic rod, 12-material spreading roller, 13-first cylinder, 14-rotating block, 15-groove, 16-diameter-changing roller, 17-first power member, 18-anti-sticking plate, 19-second power member, 20-second telescopic rod, 21-material retention roller, 22-second cylinder, 23-air pump, 24-gas mixing chamber, 25-transfer shell, 26-rotating ring, 27-gas injection chamber. DETAILED DESCRIPTION

[0019] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Example 1

[0020] This embodiment discloses a feeding device for a heavy calcium carbonate calcining furnace, which is used to assist in feeding heavy calcium carbonate.

[0021] like Figure 1-Figure 5As shown, the feeding device includes a base 1, which is made of reinforced cement, a support frame 2 is fixed on the base 1, a fixed frame 4 and a charging shell 5 are fixed on the support frame 2, a rotary kiln 3 is arranged on the support frame 2, and the rotary kiln 3 is an existing rotary kiln, which will not be described in detail here, and the rotary kiln 3 is tilted on the base 1, with the left side higher and the right side lower, the right side of the charging shell 5 is rotatably connected and connected to the bulk shell 6, the left rear side of the charging shell 5 is connected to the feeding pipe, the charging shell 5, the bulk shell 6 and the charging shell 5 are connected to the feeding pipe. The material shell 6 and the inner diameter of the rotary kiln 3 are the same. A plurality of plug connectors are provided on the right side of the bulk material shell 6, and a plurality of plug slots are provided on the left side of the cylinder of the rotary kiln 3. The two are plugged into each other. The injection shell 5, the bulk material shell 6 and the rotary kiln 3 are connected in sequence, so that when the cylinder of the rotary kiln 3 rotates, the bulk material shell 6 is driven to rotate together. The injection shell 5 is rotatably connected to the rotating shaft 7, and the rotating shaft 7 is fixed with a valve plate 8. A fan-shaped through hole is formed between the valve plate 8 and the inner wall of the bulk material shell 6, that is, the position of the valve plate 8 is used to control the bulk material shell 6. The material shell 6 and the feeding state (connecting position) of the rotary kiln 3 cylinder are fixedly connected to the support frame 2 with a motor 9, the output shaft of the motor 9 is fixedly connected to the rotating shaft 7, and the bulk material shell 6 is provided with a spreading unit; the spreading unit includes a rotating frame 10, which is an annular frame. The rotating frame 10 is rotatably connected to the bulk material shell 6, and the rotating frame 10 is fixedly connected to a first telescopic rod 11. The telescopic end of the first telescopic rod 11 is provided with a spreading roller 12, and the spreading roller 12 does not contact the inner wall of the bulk material shell 6. The distance between the bulk material shell 6 and the spreading roller 12 can be adjusted according to the thickness of the raw material required to be spread. An electric rotating shaft is provided on the telescopic end of the first telescopic rod 11, and the spreading roller 12 is sleeved on the electric rotating shaft for driving the spreading roller 12 to actively rotate, and the rotation direction of the spreading roller 12 is opposite to the rotation direction of the bulk material shell 6, thereby spreading the heavy calcium carbonate particles (hereinafter referred to as raw materials) to ensure the looseness of the raw materials. A flattening mechanism for gradually flattening the heavy calcium carbonate is provided on the rotating shaft 7.

[0022] like Figure 3-Figure 5 As shown, the flattening mechanism includes a first cylinder 13, which is fixed to the rotating shaft 7. The telescopic end of the first cylinder 13 is rotatably connected to the rotating block 14, and the rotating block 14 is fixed to the variable diameter roller 16. The variable diameter roller 16 is truncated, and its maximum diameter is equal to the diameter of the spreading roller 12, that is, the distance between the variable diameter roller 16 and the bulk material shell 6 gradually decreases from left to right, and is used to gradually flatten the accumulated material. The variable diameter roller 16 is fixed to the spreading roller 12, and the first cylinder 13 can synchronously adjust the distance between the spreading roller 12 and the variable diameter roller 16 and the injection shell 5 according to demand. The variable diameter roller 16 is provided with spaced grooves 15, and the width of the spaced grooves 15 on the variable diameter roller 16 decreases from left to right. In this way, when the raw material is spread, the raw material is intermittently relaxed through the spaced grooves, thereby reducing the probability of the raw material being continuously compressed and tightened.

[0023] The use process of the feeding device in this embodiment is as follows: Loading preparation: dock the right side of the bulk material shell 6 with the cylinder of the rotary kiln 3, and install the injection shell 5 on the support frame 2. At this time, the injection shell 5, bulk material shell 6 and the cylinder of the rotary kiln 3 are connected to each other. The user controls the motor 9 to drive the valve plate 8 to rotate through the rotating shaft 7 until the valve plate 8, the spreading roller 12 and the reducing roller 16 rotate to the following position: Figure 3 As shown, stop rotating the valve plate 8 and the preparation work is completed.

[0024] Loading process: Start the rotary kiln 3, and the cylinder of the rotary kiln 3 drives the bulk shell 6 to rotate synchronously (the bulk shell 6 rotates counterclockwise when viewed from left to right), and the raw materials are injected into the injection shell 5 through the feeding pipe of the injection shell 5 in a timed and quantitative mode. The raw materials gradually move to the right, and the electric shaft on the spreading roller 12 is started. The spreading roller 12 drives the variable diameter roller 16 to rotate synchronously, and the rotation direction of the spreading roller 12 is opposite to that of the bulk shell 6. The raw materials gradually move into the bulk shell 6 during the process of moving to the left, and the bulk shell 6 drives the raw materials to rotate. During the process of the bulk shell 6 driving the raw materials to rotate, the raw materials contact the variable diameter roller 16 and enter the bulk shell 6 and the variable diameter roller. 16, as the variable diameter roller 16 rotates, the relative rotation of the variable diameter roller 16 and the bulk shell 6 squeezes and flattens the raw material, and as the bulk shell 6 continues to rotate, the raw material gradually moves to the right, and in this process, the spreading thickness of the raw material on the bulk shell 6 gradually decreases, until the raw material moves to the right and contacts with the spreading roller 12, at this time the raw material spreading thickness no longer changes, as the raw material gradually moves to the right, the continuously rotating spreading roller 12 and the bulk shell 6 cooperate to turn the raw material to ensure its uniformity, and then the flattened material passes through the fan-shaped through hole between the valve plate 8 and the bulk shell 6 into the cylinder of the rotary kiln 3 for calcination, and the loading is completed at this time.

[0025] When feeding is not required, the control motor 9 drives the valve plate 8 to rotate 180 degrees through the rotating shaft 7, so that the fan-shaped through hole between the valve plate 8 and the bulk material shell 6 moves to the upper side, and the feeding is stopped. Example 2

[0026] The present embodiment discloses a feeding device for a heavy calcium carbonate calcining furnace, which, based on the embodiment 1, further has the function of preventing material from agglomerating and sticking.

[0027] like Figure 3-Figure 7 As shown, it also includes an anti-sticking mechanism for dispersing heavy calcium carbonate. The anti-sticking mechanism is arranged on the rotating shaft 7. The anti-sticking mechanism includes two first power members 17 with mirror distribution. The mirror distribution first power members 17 are both arranged on the rotating shaft 7. The two first power members 17 are commonly fixed with an anti-sticking plate 18 through a mounting rod. The first power member 17 is an existing electric swivel, which is used to control the position of the anti-sticking plate 18 in the bulk material shell 6. The front and rear sides of the anti-sticking plate 18 are both provided with inclined surfaces, and its thickness gradually decreases from left to right, that is, the degree of flipping of the raw materials after passing through the anti-sticking plate 18 is adjusted according to the degree of accumulation of the raw materials.

[0028] like Figure 3-Figure 6 As shown, it also includes a second power member 19, the second power member 19 is arranged on the rotating shaft 7, the second power member 19 is the same as the first power member 17, both are electric swivels, the second power member 19 is fixedly connected to a second telescopic rod 20, and a material retention roller 21 is provided on the second telescopic rod 20. The material retention roller 21 is located on the right side of the bulk material shell 6, and the anti-sticking plate 18 is located on the left side of the bulk material shell 6, and the material retention roller 21 does not contact the anti-sticking plate 18. The telescopic end of the second telescopic rod 20 is provided with an electric rotating shaft, and the material retention roller 21 is sleeved on the electric rotating shaft. The outside of the shaft is used to drive the material retention roller 21 to rotate, and the rotation direction of the material retention roller 21 is the same as the rotation direction of the bulk material shell 6, which is used to cause relative rolling between the raw material and the bulk material shell 6 to increase the dispersion of the raw material and improve the subsequent calcination effect of the raw material. The rotating shaft 7 is rotatably connected to the second cylinder 22. In this article, the power parts in the bulk material shell 6 are all connected to the external power source through the rotating shaft 7. The telescopic end of the second cylinder 22 is rotatably connected to the material retention roller 21, and the second cylinder 22 is used to control the distance between the material retention roller 21 and the bulk material shell 6.

[0029] During the process of spreading the raw materials by the variable diameter roller 16, the variable diameter roller 16 will squeeze the raw materials to a certain extent. If the moisture content of the raw materials is high, the raw materials will be agglomerated. The agglomerated raw materials may continue to remain on the rear side of the variable diameter roller 16 and may adhere to the bottom surface of the bulk material shell 6, thereby affecting the feeding (resulting in a reduction in the feed amount per unit time, etc.).

[0030] The use process of the feeding device in this embodiment is as follows: During the process of the variable diameter roller 16 spreading the raw materials, the first power member 17 is controlled to drive the anti-sticking plate 18 to rotate to the front side of the variable diameter roller 16. After the raw materials are squeezed and spread by the variable diameter roller 16, as the bulk material shell 6 drives the spread raw materials to continue to rotate, the raw materials contact the rear inclined surface of the anti-sticking plate 18 (the anti-sticking plate 18 and the raw materials move relative to each other), and the anti-sticking plate 18 "scoops up" the raw materials. As the subsequent raw materials are pushed, the "scooped" raw materials gradually move out of the anti-sticking plate 18, thereby dispersing the raw materials. In this process, the first power member 17 drives the anti-sticking plate 18 to continuously move forward. The anti-sticking plate 18 rotates again. When the anti-sticking plate 18 rotates to the front side of the variable diameter roller 16, the anti-sticking plate 18 "scoops up" and disperses the raw materials. When the anti-sticking plate 18 rotates in the opposite direction to the rear side of the variable diameter roller 16, if the raw materials on the rear side of the variable diameter roller 16 accumulate on the rear side of the variable diameter roller 16 due to agglomeration and continue to roll (that is, the agglomerated spherical raw materials are difficult to be extruded and spread under the drive of the variable diameter roller 16 and the bulk material shell 6), the anti-sticking plate 18 squeezes the agglomerated raw materials accumulated on the rear side of the variable diameter roller 16, that is, the variable diameter roller 16, the bulk material shell 6 and the anti-sticking plate 18 squeeze the agglomerated raw materials together, thereby breaking the agglomerated raw materials.

[0031] When the raw material moves to the right near the spreading roller 12, the raw material is driven to rotate by the rotation of the bulk shell 6, and the raw material moves forward, starting the retention roller 21. After the retention roller 21 contacts the raw material, the rotation range of the retention roller 21 is always within the fan-shaped through hole range between the bulk shell 6 and the valve plate 8. Under the combined action of the rotation of the retention roller 21 and the rotation of the bulk shell 6, part of the raw material and the bulk shell 6 slide relative to each other (that is, the upper layer of raw material is driven by the retention roller 21 to stay briefly on the upper side of the retention roller 21, and then continues to move to the right, while the lower layer of raw material gradually falls downward under the drive of the bulk shell 6, thereby changing the distribution of the upper and lower layers of raw materials), thereby improving the dispersion of the raw materials and improving the subsequent calcination effect. Example 3

[0032] The present embodiment discloses a feeding device for a heavy calcium carbonate calcining furnace, which, based on the second embodiment, further has a step preheating function.

[0033] like Figure 2 、 Figure 3 、 Figure 6 and Figure 8 As shown, it also includes a preheating mechanism for step-by-step heating of heavy calcium carbonate, the preheating mechanism is arranged on the fixed frame 4, the preheating mechanism includes an air pump 23, the air pump 23 is an existing device for transporting gas, the air pump 23 is fixed to the fixed frame 4 through a mounting frame, and a mixing chamber 24 is provided in the side wall of the bulk shell 6, the mixing chamber 24 is a cylindrical chamber, the support frame 2 is fixed with spaced intermediate shells 25, there are three intermediate shells 25, two of which are located outside the bulk shell 6, and one is located outside the cylinder of the rotary kiln 3. The air inlet of the air pump 23 is connected to the intermediate shell 25 located outside the cylinder of the rotary kiln 3 through a pipeline, and the air outlet of the air pump 23 is connected to the intermediate shell 25 located outside the cylinder of the rotary kiln 3 through a pipeline. The transfer shell 25 on the right side of the material shell 6 is connected, and the transfer shell 25 is rotatably connected to the rotating ring 26. The left transfer shell 25 is connected to the middle part of the mixing chamber 24 through the rotating ring 26 and the pipeline. The right transfer shell 25 is connected to the cylinder of the rotary furnace 3 through the rotating ring 26 and the pipeline. The middle transfer shell 25 is connected to the right part of the mixing chamber 24 through the rotating ring 26 and the pipeline. An injection chamber 27 is provided on the injection shell 5. The injection chamber 27 is connected to the external gas supply system through a pipeline. The injection chamber 27 is connected to the mixing chamber 24 through evenly distributed through holes. The external gas supply system is used to inject room temperature gas into the mixing chamber 24 through the injection chamber 27 to regulate the temperature of the mixing chamber 24.

[0034] If raw materials with high moisture content are fed directly into the high-temperature calcination zone, the surface moisture will rapidly vaporize, generating large amounts of steam. If this steam cannot be expelled in time, localized high pressure will form between the particles, causing the particles to clumping together due to capillary action or surface softening. This will result in different calcination effects between the external and internal surfaces of the raw materials during calcination.

[0035] The use process of the feeding device in this embodiment is as follows: When the raw materials are calcined, the air pump 23 is started, and the air inlet of the air pump 23 sucks the high-temperature carbon dioxide (hereinafter referred to as gas) generated by the calcination in the cylinder of the rotary kiln 3 into the air pump through the pipeline, the right middle rotating shell 25, the rotating ring 26 and the pipeline, and the high-temperature gas generated by the calcination in the cylinder of the rotary kiln 3 is transported to the gas mixing chamber 24 through the air outlet, the pipeline, the middle middle rotating shell 25, the rotating ring 26 and the pipeline. At the same time, the external gas supply system is controlled to inject room-temperature gas into the gas injection chamber 27. The room-temperature gas in the gas injection chamber 27 is discharged through the upper passage. The raw materials are transported to the mixing chamber 24 through the hole, and the mixing chamber 24 rotates synchronously with the bulk shell 6. The room temperature gas and the high temperature gas in the mixing chamber 24 are mixed therein, and the gas in the mixing chamber 24 is discharged outward through the middle transfer shell 25, so that the temperature of the bulk shell 6 changes from left to right in a step-by-step manner (the highest temperature of the bulk shell 6 is not enough to cause the decomposition of the raw materials). That is, the raw materials are preheated and heated synchronously during the movement from left to right in the bulk shell 6, so as to reduce the moisture content of the raw materials during calcination, thereby improving the subsequent calcination effect.

[0036] The technical principles of the embodiments of the present invention have been described above in conjunction with specific embodiments. These descriptions are intended solely to explain the principles of the embodiments of the present invention and should not be construed in any way as limiting the scope of protection of the embodiments of the present invention. Based on the explanations herein, those skilled in the art will be able to conceive of other specific implementations of the embodiments of the present invention without inventive effort, and such implementations will fall within the scope of protection of the embodiments of the present invention.

Claims

1. A charging device for a heavy calcium carbonate calcining furnace, characterized in that: The invention comprises a base (1), a support frame (2) fixedly connected to the base (1), a fixed frame (4) and an injection shell (5) fixedly connected to the support frame (2), the injection shell (5) being rotatably connected and connected to a bulk shell (6), the bulk shell (6) and the rotary kiln (3) being plugged into each other, the injection shell (5), the bulk shell (6) and the rotary kiln (3) being connected in sequence, the injection shell (5) being rotatably connected to a rotating shaft (7), the rotating shaft (7) being fixedly connected to a valve plate (8), the support frame (2) being fixedly connected to a motor (9), the output shaft of the motor (9) being fixedly connected to the rotating shaft (7), and the bulk shell (6) being provided with a material spreading unit; The material spreading unit comprises a rotating frame (10), the rotating frame (10) is rotatably connected to the bulk material shell (6), the rotating frame (10) is fixedly connected to a first telescopic rod (11), a material spreading roller (12) is provided at the telescopic end of the first telescopic rod (11), and a spreading mechanism for gradually spreading the heavy calcium carbonate is provided on the rotating shaft (7).

2. The charging device of a heavy calcium carbonate calcining furnace according to claim 1, characterized in that: The flattening mechanism includes a first cylinder (13), the first cylinder (13) is fixed to the rotating shaft (7), the telescopic end of the first cylinder (13) is rotatably connected to a rotating block (14), the rotating block (14) is fixed to a variable diameter roller (16), the variable diameter roller (16) is truncated, and the maximum diameter thereof is equal to the diameter of the spreading roller (12), the diameter of the variable diameter roller (16) gradually increases from the side close to the injection shell (5) to the side away from the injection shell (5), and the variable diameter roller (16) is fixed to the spreading roller (12).

3. The charging device of a heavy calcium carbonate calcining furnace according to claim 2, characterized in that: The diameter-changing roller (16) is provided with grooves (15) distributed at intervals.

4. The charging device for a heavy calcium carbonate calcining furnace according to claim 3, characterized in that: The widths of the grooves (15) distributed at intervals on the diameter-changing roller (16) decrease sequentially from a side away from the spreading roller (12) to a side close to the spreading roller (12).

5. The charging device for a heavy calcium carbonate calcining furnace according to claim 2, characterized in that: The invention also includes an anti-sticking mechanism for dispersing heavy calcium carbonate, wherein the anti-sticking mechanism is arranged on the rotating shaft (7), and the anti-sticking mechanism includes mirror-distributed first power members (17). The mirror-distributed first power members (17) are all arranged on the rotating shaft (7), and the mirror-distributed first power members (17) are fixedly connected to an anti-sticking plate (18) via a mounting rod.

6. The charging device for a heavy calcium carbonate calcining furnace according to claim 5, characterized in that: The thickness of the anti-sticking plate (18) gradually decreases from a side close to the injection shell (5) to a side away from the injection shell (5).

7. The feeding device of a heavy calcium carbonate calcining furnace according to claim 5, characterized in that: The invention also includes a second power member (19), the second power member (19) is arranged on the rotating shaft (7), the second power member (19) is fixedly connected to a second telescopic rod (20), and the second telescopic rod (20) is provided with a material retention roller (21).

8. The feeding device of a heavy calcium carbonate calcining furnace according to claim 7, characterized in that: The rotating shaft (7) is rotatably connected to a second cylinder (22), and the telescopic end of the second cylinder (22) is rotatably connected to the material retention roller (21).

9. The charging device for a heavy calcium carbonate calcining furnace according to claim 1, characterized in that: The invention also includes a preheating mechanism for stepwise heating of heavy calcium carbonate, the preheating mechanism being arranged on the fixed frame (4), the preheating mechanism including an air pump (23), the air pump (23) being fixed to the fixed frame (4) via a mounting frame, a gas mixing chamber (24) being arranged in the side wall of the bulk shell (6), and the support frame (2) being fixed with intermediate transfer shells (25) distributed at intervals, one of the intermediate transfer shells (25) being located outside the rotary furnace (3), and the other intermediate transfer shells (25) being located outside the rotary furnace (3). On the outside of the bulk material shell (6), the air inlet of the air pump (23) is communicated with the intermediate shell (25) located outside the rotary kiln (3) through a pipeline, and the air outlet of the air pump (23) is communicated with the intermediate shell (25) located outside the bulk material shell (6) and close to the fixed frame (4) through a pipeline. The intermediate shell (25) is rotatably connected to a rotating ring (26), and the rotating rings (26) distributed at intervals are respectively communicated with the rotary kiln (3) and the gas mixing chamber (24) through pipelines.

10. The feeding device of the heavy calcium carbonate calcining furnace according to claim 9, characterized in that: The injection shell (5) is provided with an air injection cavity (27), the air injection cavity (27) is connected to an external air supply system through a pipeline, and the air injection cavity (27) is connected to the air mixing cavity (24) through evenly distributed through holes.

Images