A rotary kiln non-contact temperature measuring monitoring device

Abstract

The utility model relates to a rotary kiln non -contact temperature measurement monitoring devices, including rotary kiln temperature acquisition module, data transmission module and control module, rotary kiln temperature acquisition module configuration is used for monitoring and generates rotary kiln inside and outside thermal imaging chart, and rotary kiln temperature acquisition module is connected through data transmission module and control module between signal, control module configuration is used for the summary and output display rotary kiln temperature acquisition module's transmission data. Through rotary kiln temperature acquisition module carries out non -contact temperature measurement, carries out comprehensive, accurate temperature monitoring to rotary kiln head and kiln outside, and equipment running process does not influence rotary kiln normal work, and can work stably under high temperature condition, and the temperature measurement range covers the normal and abnormal temperature in the kiln, thereby stably monitors the temperature of rotary kiln and generates thermal imaging chart.

Description

Technical Field

[0001] This utility model relates to the technical field of rotary kiln monitoring facilities, specifically a non-contact temperature monitoring device for rotary kilns. Background Technology

[0002] A rotary kiln (also known as a rotary calcining kiln) is used for the mechanical, physical, or chemical treatment of solid materials. It offers advantages such as high calcination quality and high-quality products, making it an important piece of equipment in many production industries, including building materials, metallurgy, chemicals, and environmental protection. Based on the materials they process, rotary kilns can be classified as cement rotary kilns, metallurgical and chemical kilns, and lime kilns. A rotary kiln is a cylindrical structure with a certain inclination, typically 3-3.5%. The rotation of the kiln promotes mixing and reaction of the materials within, allowing them to come into contact and react. Taking a cement rotary kiln as an example, raw meal powder is fed into the kiln body from the high end of the kiln tail section through a feed pipe. Due to the inclination and slow rotation of the kiln body, the material undergoes a complex motion—both tumbling circumferentially and moving axially from high temperature to low temperature. The raw meal undergoes decomposition and calcination processes within the kiln, eventually being converted into cement clinker, which is then discharged from the bottom of the kiln body and enters a cooler. Fuel is injected from the kiln head and combusted inside the kiln, raising the internal temperature to over 1200℃, with some areas reaching 1300-1400℃. The heat from the combustion heats the raw materials, calcining them into clinker. The hot air generated during this material exchange process enters the kiln system from the feed end and is finally discharged into the atmosphere through the chimney.

[0003] Under normal operating conditions, the internal temperature of the kiln exceeds 1200℃, while the temperature in the firing zone reaches as high as 1300℃-1400℃. Due to the heating of the firing zone, the kiln wall temperature near the kiln head is higher than in other areas. As the rotary kiln is used for an extended period, the lining becomes thinner and may even detach due to continuous erosion from the high temperature and friction from the clinker. Manual inspections make it difficult to accurately detect abnormal areas, hindering direct and effective control of rotary kiln safety. Therefore, a non-contact temperature monitoring device for rotary kilns that can monitor the internal and external conditions of the kiln in real time is urgently needed. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] This invention provides a non-contact temperature monitoring device for rotary kilns, which solves the problem that it is difficult to accurately detect abnormal areas of rotary kilns affected by high temperatures during manual inspections.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a non-contact temperature monitoring device for a rotary kiln, comprising a rotary kiln temperature acquisition module, a data transmission module, and a control module. The rotary kiln temperature acquisition module is configured to monitor and generate thermal images of the inside and outside of the rotary kiln. The rotary kiln temperature acquisition module is connected to the control module via a signal through the data transmission module. The control module is configured to summarize and output the transmitted data from the rotary kiln temperature acquisition module for display.

[0008] Preferably, the rotary kiln temperature acquisition module includes an in-kiln monitoring thermal imager for monitoring the internal temperature of the rotary kiln, and at least one external monitoring thermal imager for monitoring the external temperature of the rotary kiln. The probe end of the in-kiln monitoring thermal imager extends into the interior of the rotary kiln, and the probe end of the in-kiln monitoring thermal imager is driven to adjust its position by an automatic retraction device. The automatic retraction device is configured as one of a hydraulic push rod, a pneumatic push rod, or an electric push rod, and the output end of the automatic retraction device is connected to the probe end of the in-kiln monitoring thermal imager.

[0009] In a further preferred embodiment, the data transmission module includes a core switch and data lines. The in-kiln monitoring thermal imager and the out-of-kiln monitoring thermal imager in the rotary kiln temperature acquisition module are both connected to the input terminal of the core switch via data lines, and the output terminal of the core switch is connected to the control module via data lines.

[0010] In a further preferred embodiment, the control module includes a field interaction terminal, a field display, a remote interaction terminal, a remote display, and a data storage device. The output terminal of the core switch is connected to the input terminals of the field interaction terminal, the remote interaction terminal, and the data storage device via data cables. The output terminals of the field interaction terminal and the remote interaction terminal are respectively connected to the input terminals of the field display and the remote display.

[0011] (III) Beneficial Effects

[0012] Compared with the prior art, this utility model provides a non-contact temperature monitoring device for rotary kilns, which has the following advantages:

[0013] In this invention, a non-contact temperature measurement is performed through a rotary kiln temperature acquisition module, enabling comprehensive and accurate temperature monitoring of the kiln head and the outside of the kiln. The equipment does not affect the normal operation of the rotary kiln during operation and can work stably under high temperature conditions. Moreover, the temperature measurement range covers both normal and abnormal temperatures inside the kiln, thereby stably monitoring the rotary kiln temperature and generating thermal imaging maps.

[0014] In this invention, the combination of the data transmission module and the control module allows on-site construction personnel and rear maintenance personnel to view the rotary kiln temperature monitoring status in real time, thus facilitating rapid response and maintenance based on the monitoring status. In addition, historical thermal imaging data can be stored for later retrieval and playback. Attached Figure Description

[0015] Figure 1 This is a structural block diagram of the rotary kiln non-contact temperature monitoring device according to the implementation plan;

[0016] Figure 2 This is a topology diagram of the rotary kiln non-contact temperature monitoring device according to the implementation plan;

[0017] Figure 3 This is a schematic diagram of the structure of the kiln monitoring thermal imager and automatic unloading device in conjunction with the rotary kiln, according to the implementation plan. Detailed Implementation

[0018] 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.

[0019] Please see Figures 1 to 3 A non-contact temperature monitoring device for rotary kilns includes a rotary kiln temperature acquisition module, a data transmission module, and a control module. The rotary kiln temperature acquisition module monitors and generates thermal images of the inside and outside of the rotary kiln. Feedback data from the acquisition module can be transmitted via a signal connection between the data transmission module and the control module. The control module then configures, summarizes, and displays the transmitted data, enabling monitoring by on-site personnel and maintenance staff.

[0020] In this embodiment, the rotary kiln temperature acquisition module includes an in-kiln monitoring thermal imager for monitoring the internal temperature of the rotary kiln, and at least one external monitoring thermal imager for monitoring the external temperature of the rotary kiln. The probe of the in-kiln monitoring thermal imager can extend into the rotary kiln during use, and its insertion into or removal from the rotary kiln is adjusted by an automatic retraction device. The automatic retraction device can be a hydraulic push rod, a pneumatic push rod, or an electric push rod, and its output end is connected to the probe of the in-kiln monitoring thermal imager via brackets and bolts, allowing the probe of the in-kiln monitoring thermal imager to be driven. The in-kiln monitoring thermal imager can be a high-temperature resistant, dustproof, waterproof, or explosion-proof thermal imager already available in the technology. The in-kiln monitoring thermal imager can acquire real-time information on the internal wall temperature distribution, raw material movement trajectory, ring distribution, and refractory material condition, and can output information such as the highest temperature inside the kiln as needed, which is beneficial for the factory to make timely judgments about the kiln's internal conditions. The installation of external thermal imagers can detect early abnormal defects in the kiln wall before internal refractory material erosion and flaking occur, and even before the steel plate softens and melts, thus minimizing the risk of "red-hot kilns." To accommodate the length of the rotary kiln and provide comprehensive external temperature monitoring, several external thermal imagers can be deployed at intervals along the kiln's length. By monitoring the external temperature of the rotary kiln, and combining this with the relationship between ring thickness and kiln wall temperature, as well as the relationship between refractory material thickness erosion and kiln wall temperature, the thickness and distribution of rings within the kiln, and the extent of refractory material flaking, can be analyzed. Existing single-cell thermal imagers can be used for external monitoring.

[0021] In this embodiment, the data transmission module includes a core switch and data cables (optical fiber, network cable). Both the in-kiln monitoring thermal imager and the out-of-kiln monitoring thermal imager in the rotary kiln temperature acquisition module are connected to the input of the core switch via data cables (Category 6, double-shielded network cable). The output of the core switch is connected to the control module via a data cable (optical fiber). The data transmission module can aggregate the data collected and analyzed by the front-end devices to the control module for storage and further in-depth processing applications.

[0022] In this embodiment, the control module includes a field interaction terminal, a field display, a remote interaction terminal, a remote display, and a data storage device. The output of the core switch is connected to the input of the field interaction terminal, the remote interaction terminal, and the data storage device via data cables. The outputs of the field interaction terminal and the remote interaction terminal are connected to the inputs of the field display and the remote display, respectively. The field interaction terminal can be an industrial control computer, the remote interaction terminal can be a computer, and the data storage device can be a hard disk recorder. Both the industrial control computer and the computer can analyze, process, record, alarm, and generate reports on all data transmitted from the field. The field display and the remote display can output and display the collected full-radiation infrared images on-site and in the rear monitoring room, respectively, and allow real-time viewing of the temperature distribution, maximum temperature, minimum temperature, and average temperature in various areas of the rotary kiln. In addition, the field interaction terminal and the remote interaction terminal can also plot the rotary kiln temperature change curve based on the obtained data, displaying the temperature change trend diagram of various areas inside and outside the kiln, providing a reference for analyzing the location and state of coking or refractory material detachment inside the rotary kiln.

[0023] In this embodiment, a proximity switch can also be set to monitor the rotation status of the kiln. When the kiln rotates one revolution, an IO signal is output. For each revolution of the rotary kiln, the field interaction terminal and the remote interaction terminal can record the temperature distribution after the outer surface of the kiln wall is unfolded, and display the highest and lowest temperature values ​​of different areas during this revolution.

[0024] In this embodiment, an audible and visual alarm device can also be installed at the rotary kiln working site. The audible and visual alarm device is responsible for providing audible and visual alarms to the site. When the detected temperature exceeds the warning value, the audible and visual alarm is automatically triggered, which helps the staff to detect temperature abnormalities in a timely manner.

[0025] In this embodiment, the on-site interactive terminal is equipped with a rotary kiln thermal imaging analysis system responsible for six major tasks: real-time monitoring of the rotary kiln, acquisition of kiln outer wall temperature data, analysis of temperature in various areas of the kiln outer wall, alarm for abnormal kiln outer wall temperature, real-time monitoring of the kiln interior, and acquisition of kiln interior temperature data. The system software reads and analyzes temperature data in real time: first, the software receives the temperature stream transmitted from the infrared thermal imager in real time; then, by configuring temperature acquisition lines in the software and combining them with the rotary kiln operating status information, it realizes the functions of generating a temperature distribution map of the kiln outer wall and analyzing the temperature of various areas of the kiln outer wall.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances. Moreover, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A non-contact temperature monitoring device for a rotary kiln, characterized in that, The system includes a rotary kiln temperature acquisition module, a data transmission module, and a control module. The rotary kiln temperature acquisition module is configured to monitor and generate thermal images of the inside and outside of the rotary kiln. The rotary kiln temperature acquisition module is connected to the control module via a signal through the data transmission module. The control module is configured to summarize and output the transmitted data from the rotary kiln temperature acquisition module for display.

2. The rotary kiln non-contact temperature monitoring device according to claim 1, characterized in that: The rotary kiln temperature acquisition module includes an in-kiln monitoring thermal imager for monitoring the internal temperature of the rotary kiln, and at least one external monitoring thermal imager for monitoring the external temperature of the rotary kiln.

3. The rotary kiln non-contact temperature monitoring device according to claim 2, characterized in that: The probe end of the kiln-in-the-kiln monitoring thermal imager extends into the interior of the rotary kiln, and the probe end of the kiln-in-the-kiln monitoring thermal imager is driven to adjust its position state by an automatic retraction device.

4. The rotary kiln non-contact temperature monitoring device according to claim 3, characterized in that: The automatic unloading device is configured as one of a hydraulic push rod, a pneumatic push rod, or an electric push rod, and the output end of the automatic unloading device is connected to the detection end of the thermal imager for monitoring inside the kiln.

5. The rotary kiln non-contact temperature monitoring device according to claim 1, characterized in that: The data transmission module includes a core switch and data lines. The in-kiln monitoring thermal imager and the out-of-kiln monitoring thermal imager in the rotary kiln temperature acquisition module are both connected to the input terminal of the core switch via data lines. The output terminal of the core switch is connected to the control module via data lines.

6. The rotary kiln non-contact temperature monitoring device according to claim 5, characterized in that: The control module includes a field interaction terminal, a field display, a remote interaction terminal, a remote display, and a data storage device. The output terminal of the core switch is connected to the input terminals of the field interaction terminal, the remote interaction terminal, and the data storage device via data cables. The output terminals of the field interaction terminal and the remote interaction terminal are respectively connected to the input terminals of the field display and the remote display.

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