A device for reducing the amount of settling ash generated in a rotary kiln and preventing ring formation in the middle and later stages of the rotary kiln.

Abstract

This utility model relates to the technical field of rotary kiln equipment and discloses a device for reducing the amount of settling ash generated in a rotary kiln and preventing ring formation in the middle and rear sections of the kiln. It includes a feed belt tail end, with a disc granulator and a compressor installed at the feed belt tail end and the kiln inlet. The disc granulator and compressor act on the kiln tail section, which is equipped with a temperature monitoring and control device that transmits signals to the kiln head control room. This utility model significantly reduces the amount of settling ash generated, improving product quality, greatly reducing the load on the return material equipment and increasing the equipment's production load, thus extending the equipment's service life. Furthermore, by adding a temperature monitoring and control device and an alarm device, the kiln speed and material speed can be adjusted in a timely manner, solving the problem of ring formation at the kiln tail.

Description

Technical Field

[0001] This utility model relates to the technical field of rotary kiln equipment, specifically to a device for reducing the amount of settling ash generated in a rotary kiln and preventing ring formation in the middle and later stages of the rotary kiln. Background Technology

[0002] In industries such as building materials, metallurgy, and chemicals, rotary kilns serve as core equipment, undertaking the crucial task of high-temperature material processing. However, with the expansion of production scale and the increasing demands of processes, numerous problems exposed during the operation of rotary kilns have seriously affected production efficiency and economic benefits. Settling ash has become a major challenge for the industry. Currently, similar rotary kilns on the market generally exhibit a large amount of settling ash. This settling ash not only mixes into the product, leading to decreased product purity and substandard quality, directly impacting the company's market competitiveness, but also increases the load on the settling ash return and lifting equipment. Frequent handling of large amounts of settling ash keeps the return and lifting equipment under high load for extended periods, easily causing equipment damage, shortening equipment lifespan, increasing maintenance and replacement costs, and disrupting normal production. Meanwhile, the ring formation problem in the middle and later stages of the rotary kiln is equally challenging. Especially in the tail section of the rotary kiln, changes in material properties and uneven temperature distribution easily lead to frequent ring formation. Traditional methods for dealing with tail-end ring formation, such as adding coke powder to raise the temperature for kiln washing, have yielded unsatisfactory results. Not only is it difficult to completely eliminate ring formation, but improper temperature control can also lead to other production problems, resulting in raw material waste, increased energy consumption, and significant losses for enterprises, thus hindering the green and efficient development of the industry. Therefore, there is an urgent need to develop a device that can effectively reduce the amount of settling ash generated in rotary kilns and prevent ring formation in the middle and later stages of the kiln, in order to solve existing technical problems and improve the operational stability and production efficiency of rotary kilns. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a device to reduce the amount of settling ash generated in rotary kilns and prevent ring formation in the middle and later stages of rotary kilns.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a device for reducing the amount of settling ash generated in a rotary kiln and preventing ring formation in the middle and rear sections of the rotary kiln, comprising the tail end of a feed belt, wherein a disc granulator and a blower are installed at the tail end of the feed belt and the inlet of the kiln, the disc granulator and the blower act on the tail section of the kiln, and a temperature monitoring and control device is installed on the tail section of the kiln, wherein the temperature monitoring and control device transmits signals to the central control room at the kiln head.

[0005] As a further description of the above technical solution: The disc granulator and air compressor are positioned between the end of the feed belt and the kiln inlet to improve the physical shape of the dispersed material.

[0006] As a further description of the above technical solution: The central control room at the kiln head is equipped with an alarm device and a rotary kiln control system to control the rotary kiln.

[0007] As a further description of the above technical solution: The temperature measurement and control device transmits signals to the alarm device to monitor whether the temperature at the kiln tail section exceeds the allowable range.

[0008] As a further description of the above technical solution: When the alarm device issues an alarm message, the rotary kiln control system controls the kiln speed and material speed.

[0009] This utility model has the following beneficial effects: 1. It reduces the amount of settling ash generated, improves product quality, significantly reduces the load on return equipment and increases the production load on the equipment, and extends the service life of the equipment.

[0010] 2. By adding temperature monitoring and control devices and alarm devices, the kiln speed and material speed can be adjusted in a timely manner, solving the problem of ring formation at the kiln tail. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a device for reducing the amount of settling ash generated in a rotary kiln and preventing ring formation in the middle and later stages of the rotary kiln, as proposed in this utility model.

[0012] Legend: 1. Disc granulator; 2. Air compressor; 3. Temperature monitoring and control device; 4. Alarm device; 5. Rotary kiln control system; 6. Kiln head control room; 7. Kiln tail section. Detailed Implementation

[0013] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0014] like Figure 1 As shown in the figure, this embodiment provides a device for reducing the amount of settling ash generated in a rotary kiln and preventing ring formation in the middle and rear sections of the rotary kiln. It includes the tail end of the feed belt, and a disc granulator 1 and a compressor 2 are installed at the tail end of the feed belt and the kiln inlet. The disc granulator 1 and the compressor 2 act on the kiln tail section 7. A temperature monitoring and control device 3 is installed on the kiln tail section 7. The temperature monitoring and control device 3 transmits the signal to the kiln head control room 6.

[0015] In this embodiment, a disc pelletizer is installed between the end of the feed belt and the kiln inlet. The disc pelletizer 1 mixes the fine, loose dust and binder, forming uniformly sized pellets under centrifugal and frictional forces. A high-speed airflow is injected into the kiln inlet by a compressor 2, dispersing the pellets into the kiln. A temperature control device at the kiln tail section 7 monitors the temperature in real time, and the signal is transmitted to the central control room via a PLC. When the temperature exceeds the set range, an alarm is triggered, allowing the kiln operator to adjust the system and prevent ring formation at the kiln tail section 7. The disc pelletizer 1 increases the material bulk density, reduces airflow resistance within the kiln, and the compressed air dispersion improves the uniformity of material distribution at the kiln tail section, reducing the amount of settling ash and lowering the load on the return material equipment. The temperature control system has a response time of <10s, preventing ring formation at the kiln tail section 7.

[0016] Specifically, the disc granulator 1 and the air compressor 2 are positioned between the end of the feed belt and the kiln inlet to improve the physical shape of the dispersed material.

[0017] In this embodiment, the disc granulator 1 controls the disc rotation speed via a variable frequency motor, causing the material to move in a spiral motion within the disc. The injected binder is evenly dispersed through atomizing nozzles, forming a "nucleus-enlargement-compaction" granulation process. Furthermore, the air compressor 2 uses a Roots blower, applying a horizontal dispersing force to the material entering the kiln through adjustable nozzles (angle ±15°). This force works synergistically with the rotating airflow within the kiln, resulting in a parabolic distribution of the pellets. The combined effect of these two systems improves the material properties, ensuring that the disc granulator 1 achieves a granulation strength ≥10N / particle, meeting the requirements for tumbling and transport within the rotary kiln. The compressed air system increases the initial diffusion angle of the material entering the kiln from 30° to 60°, preventing localized material accumulation. Simultaneously, the standard deviation of the pellet residence time distribution within the kiln is reduced, improving reaction uniformity.

[0018] Specifically, the central control room 6 at the kiln head is equipped with an alarm device 4 and a rotary kiln control system 5 to control the rotary kiln.

[0019] As a preferred implementation, the rotary kiln control system 5 in the kiln head control room 6 is based on a PLC programmable logic controller, integrating multi-parameter control modules such as temperature, pressure, and rotation speed; the alarm device 4 includes an audible and visual alarm and an SMS push module, and is preset with temperature thresholds and temperature rise rate thresholds. When the data from the temperature monitoring and control device 3 triggers the threshold, the alarm device 4 alerts the operator through flashing lights, a buzzer, and an SMS (containing real-time temperature data). Example

[0020] Specifically, the temperature monitoring and control device 3 transmits the signal to the alarm device 4 to monitor whether the temperature of the kiln tail section 7 exceeds the allowable range.

[0021] It should be noted that the temperature monitoring and control device 3 adopts a dual-redundant sensor design: an infrared thermal imager monitors the temperature of the kiln tail gas, and a sheathed thermocouple is inserted into the material layer to measure the solid phase temperature. After the two sets of data are processed by a digital filtering algorithm, they are uploaded to the central control room database via the OPC protocol. The data is compared and analyzed with historical data to generate a "ring formation risk index" in real time. When the data from the temperature monitoring and control device 3 triggers the threshold, the alarm device 4 will issue an alarm message.

[0022] Specifically, when the alarm device 4 issues an alarm message, the rotary kiln control system 5 controls the kiln speed and material speed.

[0023] In this embodiment, when the temperature is outside the allowable range and the alarm device 4 issues an alarm message, the kiln operator can then coordinate and make adjustments to prevent the formation of rings at the kiln tail section.

[0024] In use, the disc granulator 1 transforms the bulk material into granular material with a certain strength, increasing the fluidity and permeability of the material in the kiln tail section 7 and reducing the production of settling ash. In addition, the temperature measurement and control device 3 and the alarm device 4 precisely control the reaction temperature of the kiln tail section 7 to prevent the material from reacting in the tail section and causing ring formation.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for reducing the amount of settling ash generated in a rotary kiln and preventing ring formation in the middle and later stages of the rotary kiln, characterized in that: Includes the end of the feed belt, on which a disc pellet mill (1) and a blower (2) are installed at the end of the feed belt and the inlet of the kiln. The disc pellet mill (1) and the blower (2) act on the kiln tail section (7). A temperature measuring and control device (3) is installed on the kiln tail section (7). The temperature measuring and control device (3) transmits the signal to the kiln head control room (6).

2. The device for reducing the amount of settling ash generated in a rotary kiln and preventing ring formation in the middle and later stages of the rotary kiln according to claim 1, characterized in that: The disc granulator (1) and the air compressor (2) are positioned between the end of the feed belt and the kiln inlet to improve the physical shape of the dispersed material.

3. The device for reducing the amount of settling ash generated in a rotary kiln and preventing ring formation in the middle and later stages of the rotary kiln according to claim 2, characterized in that: The kiln head control room (6) is equipped with an alarm device (4) and a rotary kiln control system (5) to control the rotary kiln.

4. The device for reducing the amount of settling ash generated in a rotary kiln and preventing ring formation in the middle and later stages of the rotary kiln according to claim 3, characterized in that: The temperature measurement and control device (3) transmits the signal to the alarm device (4) to monitor whether the temperature of the kiln tail section (7) exceeds the allowable range.

5. The device for reducing the amount of settling ash generated in a rotary kiln and preventing ring formation in the middle and later stages of the rotary kiln according to claim 4, characterized in that: When the alarm device (4) issues an alarm message, the rotary kiln control system (5) controls the kiln speed and material speed.

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