Efficient vertical cylinder preheater for rotary kiln

Abstract

The utility model discloses an efficient vertical cylinder preheater for a rotary kiln, and relates to the technical field of cement production. The pre-heating device comprises a pre-heating cylinder, wherein a resistance reducing mechanism and a dispersing mechanism are arranged on the pre-heating cylinder; the resistance reducing mechanism comprises a driving assembly, a resistance reducing assembly and a connecting assembly, the driving assembly comprises a dispersing barrel arranged on the preheating barrel, the dispersing barrel is fixedly connected with an ascending pipe, the ascending pipe is fixedly connected with a first motor, the output end of the first motor is fixedly connected with a first rotating shaft, and the outer wall of the first rotating shaft is fixedly connected with a gear. Through the resistance reducing mechanism, the first motor is used for driving the forward rotating wheel to rotate at a high speed, waste gas flow is driven to maintain the flow speed of upwards climbing and carrying material powder, and high-temperature waste gas can be in full contact with the material powder dispersed by the dispersing mechanism in cooperation with the resistance reducing threads to reduce the resistance of the gas flow and the spirally upward acting force; and it is guaranteed that step-by-step preheating treatment of the device is conducted stably, and the practicability of the device is improved.

Description

Technical Field

[0001] This utility model belongs to the field of cement production technology, and in particular relates to a high-efficiency vertical cylinder preheater for rotary kilns. Background Technology

[0002] Rotary kilns are common equipment in industries such as cement production, chemical metallurgy, and mineral sintering. They are mainly used to heat raw materials to high temperatures to complete the calcination process. In cement production, the rotary kiln plays a particularly important role, serving as one of the core pieces of equipment in the cement production line. To improve the energy efficiency of rotary kilns, reduce fuel consumption, and lower emissions, preheater systems are widely used in modern rotary kiln processes. In traditional cement production, materials need to be heated before entering the rotary kiln. The main task of the preheater is to utilize the heat from waste gas to preheat the raw materials. The heat in the waste gas is effectively recovered and used to heat the materials, reducing fuel demand, fuel consumption, and waste gas emissions, thereby helping to reduce environmental pollution.

[0003] However, some preheaters have relatively simple structures. When using high-speed exhaust gas flow to carry material powder into the preheating cylinder, they are often affected by pipeline resistance, which may cause the exhaust gas flow velocity to decrease step by step. This results in a slower upper airflow velocity, making it difficult to fully carry the material powder to complete the preheating effect. Utility Model Content

[0004] The purpose of this invention is to provide a high-efficiency vertical cylinder preheater for rotary kilns. By setting up a drag-reducing mechanism, the first motor drives the downstream rotor to rotate at high speed, which drives the exhaust gas flow to maintain an upward flow velocity that carries the material powder. With the help of several drag-reducing threads to reduce the drag of the airflow and the spiral upward force, it is easy for the high-temperature exhaust gas to fully contact the material powder dispersed by the dispersion mechanism. This solves the problem that the exhaust gas flow velocity may decrease step by step due to the influence of pipeline resistance, making it difficult to fully carry the material powder.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model is a high-efficiency vertical cylinder preheater for rotary kilns, including a preheating cylinder, on which a resistance-reducing mechanism and a dispersion mechanism are provided;

[0007] The drag reduction mechanism includes a drive assembly, a drag reduction assembly, and a connection assembly. The drive assembly includes a dispersion cylinder disposed on the left side of the preheating cylinder. A riser pipe is fixedly connected to the bottom end of the dispersion cylinder. A first motor is fixedly connected to the outer wall of the riser pipe. A first rotating shaft is fixedly connected to the output end of the first motor. A gear is fixedly connected to the outer wall of the first rotating shaft.

[0008] Furthermore, the drag-reducing component includes a limiting groove formed on the inner wall of the dispersing cylinder, a toothed ring rotatably connected to the inner wall of the limiting groove, the toothed ring meshing with a gear, and a downstream rotating wheel fixedly connected to the inner wall of the toothed ring.

[0009] Furthermore, the outer wall of the downstream impeller is rotatably connected to the inner wall of the limiting groove, and the inner wall of the riser pipe is fixedly connected with several resistance-reducing threads.

[0010] Furthermore, the connecting assembly includes a connecting pipe fixedly connected to the top of the dispersing cylinder, the end of the connecting pipe being fixedly connected to the outer wall of the preheating cylinder, and a flange ring being fixedly connected to the bottom end of the rising pipe.

[0011] Furthermore, the dispersing mechanism includes a feeding assembly and a flow assembly. The feeding assembly includes a discharge pipe fixedly connected to the inner wall of the dispersing cylinder. A plurality of guide plates are fixedly connected to the inner wall of the discharge pipe, and a feeding tube is fixedly connected to the outer wall of the discharge pipe.

[0012] Furthermore, the preheating cylinder has a discharge port at its bottom end and a riser at its top end, and the top end of the first rotating shaft is rotatably connected to the bottom surface of the discharge pipe.

[0013] Furthermore, the flow assembly includes a second motor fixedly connected to the front of the discharge pipe, a second rotating shaft rotatably connected to the inner wall of the discharge pipe, the front end of the second rotating shaft being fixedly connected to the output end of the second motor, and a flow divider impeller fixedly connected to the outer wall of the second rotating shaft.

[0014] This utility model has the following beneficial effects:

[0015] By setting up a drag-reducing mechanism, the high-speed rotation of the downstream rotor driven by the first motor is realized, which drives the exhaust gas flow to maintain an upward flow rate that carries the material powder. Combined with several drag-reducing threads to reduce the drag of the airflow and the upward spiral force, it is easy for the high-temperature exhaust gas to fully contact the material powder dispersed by the dispersion mechanism, ensuring the smooth operation of the device's staged preheating treatment and improving the practicality of the device.

[0016] 2. By setting up a dispersion mechanism, the second motor drives the flow divider impeller to rotate, and with the flow guide plate, the material powder is evenly and dispersedly conveyed into the dispersion cylinder. The drag reduction mechanism facilitates better entrainment of the material powder by the exhaust gas flow. While completing the preheating treatment, the material powder is conveyed into the preheating cylinder to collect and fall for the next stage of preheating treatment, which further improves the practicality of the device.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the rear view structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the rear cross-sectional structure of this utility model;

[0022] Figure 4 This is a top view sectional structural diagram of the present invention;

[0023] Figure 5 for Figure 3 A magnified structural diagram of point A in the middle.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Preheating cylinder; 2. Drag reduction mechanism; 3. Dispersion mechanism; 21. Dispersion cylinder; 22. Ascending pipe; 23. First motor; 24. First rotating shaft; 25. Gear; 26. Limiting groove; 27. Sawtooth ring; 28. Flow-following impeller; 29. ​​Drag reduction thread; 210. Connecting pipe; 211. Flange ring; 31. Discharge pipe; 32. Guide plate; 33. Feed pipe; 34. Feed port; 35. Ascending port; 36. Second motor; 37. Second rotating shaft; 38. Diverter impeller. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-5 As shown, this utility model is a high-efficiency vertical cylinder preheater for rotary kilns, including a preheating cylinder 1, on which a resistance-reducing mechanism 2 and a dispersion mechanism 3 are provided;

[0028] The drag reduction mechanism 2 includes a drive assembly, a drag reduction assembly, and a connection assembly. The drive assembly includes a dispersion cylinder 21 disposed on the left side of the preheating cylinder 1. A riser pipe 22 is fixedly connected to the bottom end of the dispersion cylinder 21. A first motor 23 is fixedly connected to the outer wall of the riser pipe 22. A first rotating shaft 24 is fixedly connected to the output end of the first motor 23. A gear 25 is fixedly connected to the outer wall of the first rotating shaft 24.

[0029] Among them, such as Figure 2 , Figure 3 and Figure 5 As shown, the drag-reducing assembly includes a limiting groove 26 formed on the inner wall of the dispersion cylinder 21. A serrated ring 27 is rotatably connected to the inner wall of the limiting groove 26. The serrated ring 27 meshes with a gear 25. A downstream rotating wheel 28 is fixedly connected to the inner wall of the serrated ring 27. The outer wall of the downstream rotating wheel 28 is rotatably connected to the inner wall of the limiting groove 26. Several drag-reducing threads 29 are fixedly connected to the inner wall of the riser pipe 22. The connecting assembly includes a connecting pipe 210 fixedly connected to the top of the dispersion cylinder 21. The end of the connecting pipe 210 is fixedly connected to the outer wall of the preheating cylinder 1. A flange ring 211 is fixedly connected to the bottom end of the riser pipe 22.

[0030] By setting up the drag reduction mechanism 2, the first motor 23 drives the downstream rotor 28 to rotate at high speed, which drives the exhaust gas flow to maintain an upward climbing speed that carries the material powder. With the help of several drag reduction threads 29, the airflow drag is reduced and the spiral upward force is applied, which makes it easier for the high temperature exhaust gas to fully contact the material powder dispersed by the dispersion mechanism 3, ensuring the smooth operation of the device's step-by-step preheating treatment and improving the practicality of the device.

[0031] Among them, such as Figure 2 , Figure 3 and Figure 4 As shown, the dispersing mechanism 3 includes a feeding assembly and a flow assembly. The feeding assembly includes a discharge pipe 31 fixedly connected to the inner wall of the dispersing cylinder 21. Several guide plates 32 are fixedly connected to the inner wall of the discharge pipe 31. A feeding pipe 33 is fixedly connected to the outer wall of the discharge pipe 31. A feeding port 34 is opened at the bottom end of the preheating cylinder 1. An ascending port 35 is opened at the top end of the preheating cylinder 1. The top end of the first rotating shaft 24 is rotatably connected to the bottom surface of the discharge pipe 31. The flow assembly includes a second motor 36 fixedly connected to the front side of the discharge pipe 31. A second rotating shaft 37 is rotatably connected to the inner wall of the discharge pipe 31. The front end of the second rotating shaft 37 is fixedly connected to the output end of the second motor 36. A diverter impeller 38 is fixedly connected to the outer wall of the second rotating shaft 37.

[0032] By setting up the dispersion mechanism 3, the second motor 36 drives the flow divider impeller 38 to rotate, and with the flow guiding effect of the guide plate 32, the material powder is uniformly and dispersedly conveyed into the dispersion cylinder 21. With the drag reduction mechanism 2, the exhaust gas flow can better carry the material powder, and while completing the preheating treatment, it is conveyed into the preheating cylinder 1 to collect and fall for the next stage of preheating treatment, which further improves the practicality of the device.

[0033] A specific application of this embodiment is as follows: By setting a drag-reducing mechanism 2, several devices are stacked and connected in an alternating manner. The flange ring 211 is fixedly connected to the riser 35, and the top of the feed pipe 33 is connected to the feed port 34. At this time, the high-speed upward flow of exhaust gas enters the riser pipe 22 and flows along the drag-reducing thread 29 on the inner wall of the riser pipe 22, causing the exhaust gas to spiral upward. At this time, the first motor 23 drives the gear 25 to rotate through the first rotating shaft 24. Since the gear 25 meshes with the sawtooth ring 27, the rotation of the gear 25 drives the sawtooth ring 27 to rotate in the limiting groove 26. The sawtooth ring 27 then drives the downstream rotating wheel 28 to rotate in the dispersion cylinder 21. Following the spiral rotation direction of the airflow, the airflow is further driven to maintain a high-speed spiral ascent. In conjunction with the dispersion mechanism 3, the material powder is uniformly and dispersedly conveyed into the dispersion cylinder 21, flowing at high speed. The exhaust gas flow, carrying powder, enters the preheating cylinder 1 through the connecting pipe 210. Due to the high temperature of the exhaust gas flow itself, the material is preheated during the process of being carried by the high-temperature airflow in the dispersing cylinder 21, connecting pipe 210, and preheating cylinder 1. The exhaust gas flow continues to rise from the riser 35 and ascends from the riser pipe 22 of the next stage preheating device. The material powder, driven by the airflow, impacts the preheating cylinder 1, falls due to resistance, and collects from the discharge port 34 into the discharge pipe 33 of the next stage. This achieves the goal of using the first motor 23 to drive the downstream rotor 28 to rotate at high speed, driving the exhaust gas flow to maintain an upward flow rate carrying the material powder. Combined with several drag-reducing threads 29 to reduce the drag of the airflow and the upward spiral force, it is easy for the high-temperature exhaust gas to fully contact the material powder dispersed by the dispersing mechanism 3, ensuring the smooth operation of the step-by-step preheating process and improving the practicality of the device.

[0034] By setting up a dispersion mechanism 3, the second motor 36 drives the second rotating shaft 37 to rotate the diversion impeller 38, which rotates and evenly separates the material powder falling and accumulating in the feed pipe 33 and conveys it into several guide plates 32. The discharge pipe 31 is designed with a flat discharge port, and the material is diverted by several guide plates 32, so that when the material powder enters the inner wall of the dispersion cylinder 21, it is more easily subjected to the direct force of the rising airflow of the riser pipe 22. This facilitates the better entrainment of the material powder by the exhaust gas airflow and its conveyance into the preheating cylinder 1 for preheating contact. The diversion impeller 38 has several grooves on its blades to avoid... This system avoids the problem of large powder particles getting stuck in the gap between the distributor impeller 38 and the inner wall of the discharge pipe 31, which would affect the rotation of the distributor impeller 38. Instead, it utilizes the second motor 36 to drive the distributor impeller 38 to rotate, and with the guidance of the guide plate 32, the material powder is evenly and dispersedly conveyed into the dispersion cylinder 21. The drag reduction mechanism 2 facilitates better entrainment of the material powder by the exhaust gas flow, completing the preheating treatment while simultaneously conveying it into the preheating cylinder 1 for collection and falling, and then proceeding to the next stage of preheating treatment, further improving the practicality of the device.

[0035] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0036] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A high-efficiency vertical cylinder preheater for a rotary kiln, comprising a preheating cylinder (1), wherein a resistance reduction mechanism (2) and a dispersion mechanism (3) are arranged on the preheating cylinder (1), characterized in that: the resistance reduction mechanism (2) comprises a driving assembly, a resistance reduction assembly and a connecting assembly, the driving assembly comprises a dispersion cylinder (21) arranged on the left side of the preheating cylinder (1), the bottom end of the dispersion cylinder (21) is fixedly connected with a riser pipe (22), the outer wall of the riser pipe (22) is fixedly connected with a first motor (23), the output end of the first motor (23) is fixedly connected with a first rotating shaft (24), and the outer wall of the first rotating shaft (24) is fixedly connected with a gear (25).

2. A high efficiency vertical shaft preheater for a rotary kiln as claimed in claim 1, wherein, the resistance reduction assembly comprises a limiting groove (26) opened on the inner wall of the dispersion cylinder (21), the inner wall of the limiting groove (26) is rotatably connected with a sawtooth ring (27), the sawtooth ring (27) is engaged with the gear (25), and the inner wall of the sawtooth ring (27) is fixedly connected with a downstream runner (28).

3. A high efficiency vertical shaft preheater for a rotary kiln as claimed in claim 2, wherein, the outer wall of the downstream runner (28) is rotatably connected with the inner wall of the limiting groove (26), and the inner wall of the riser pipe (22) is fixedly connected with a plurality of resistance reduction threads (29).

4. A high efficiency vertical shaft preheater for a rotary kiln as claimed in claim 3, wherein, the connecting assembly comprises a connecting pipe (210) fixedly connected to the top end of the dispersion cylinder (21), the distal end of the connecting pipe (210) is fixedly connected with the outer wall of the preheating cylinder (1), and the bottom end of the riser pipe (22) is fixedly connected with a flange ring (211).

5. A high efficiency vertical shaft preheater for a rotary kiln as claimed in claim 4, wherein, the dispersion mechanism (3) comprises a discharging assembly and a flow assembly, the discharging assembly comprises a discharging pipe (31) fixedly connected to the inner wall of the dispersion cylinder (21), the inner wall of the discharging pipe (31) is fixedly connected with a plurality of guide plates (32), and the outer wall of the discharging pipe (31) is fixedly connected with a discharging pipe (33).

6. A high efficiency vertical shaft preheater for a rotary kiln as claimed in claim 5, wherein, a discharging port (34) is arranged at the bottom end of the preheating cylinder (1), a riser port (35) is arranged at the top end of the preheating cylinder (1), and the top end of the first rotating shaft (24) is rotatably connected with the bottom surface of the discharging pipe (31).

7. A high efficiency vertical shaft preheater for a rotary kiln as claimed in claim 6, wherein, the flow assembly comprises a second motor (36) fixedly connected to the front surface of the discharging pipe (31), the inner wall of the discharging pipe (31) is rotatably connected with a second rotating shaft (37), the front end of the second rotating shaft (37) is fixedly connected with the output end of the second motor (36), and the outer wall of the second rotating shaft (37) is fixedly connected with a shunt impeller (38).

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