A rotary kiln shell temperature detection method

Abstract

The present application relates to the technical field of industrial kiln detection, and specifically discloses a rotary kiln shell temperature detection method, 1) the rotary kiln shell infrared temperature measurement image is divided into temperature detection units according to pixel grids; 2) the temperature detection unit corresponding to the rotary kiln center line is calibrated as a reference generatrix temperature detection unit; 3) the rotary kiln shell fixed feature point is set as a position calibration zero point, and the position calibration zero point is coincident with the reference generatrix; 4) the rotary kiln rotating speed is collected, and a reference generatrix temperature detection unit value set is formed; 5) a plurality of continuous generatrix temperature detection unit value sets are matched in sequence to form a shell surface temperature detection image; 6) the reference generatrix temperature detection unit value set is continuously collected again when the position calibration zero point is coincident with the reference generatrix, and a refreshed image is formed; 7) the infrared image display outputs the detection image, and prewarning and alarming are performed according to a model; the present application makes the rotary kiln shell temperature detection more accurate, and effectively prevents the rotary kiln shell from being damaged due to local temperature abnormally rising.

Description

Technical Field

[0001] This invention relates to the field of industrial kiln testing technology, specifically to a method for detecting the temperature of a rotary kiln shell. Background Technology

[0002] Currently, the monitoring of the kiln shell temperature and refractory condition of rotary kilns is achieved either through pre-embedded wireless thermocouples or infrared temperature measuring cameras. The limited number of pre-embedded wireless thermocouples makes accurate and complete detection impossible; and using infrared temperature measuring cameras to detect the temperature of specific locations on the rotating kiln shell surface cannot access historical trends of temperature changes in specific parts of the rotary kiln, thus making it impossible to monitor the refractory shedding status and historical trends in those specific areas.

[0003] For the reasons mentioned above, current methods for detecting and monitoring pre-embedded wireless thermocouples using infrared temperature cameras are not ideal. To address the shortcomings of existing rotary kiln shell surface temperature detection methods, and leveraging the performance characteristics of infrared temperature cameras, a rotary kiln shell temperature detection method and its implementation device have been invented to solve the problem of inaccurate detection of the kiln shell temperature in existing rotary kilns. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention aims to provide a method for detecting the temperature of a rotary kiln shell. This method involves using an infrared temperature detection camera to collect temperature values ​​from the rotary kiln shell, then dividing the rotary kiln shell into a grid according to the pixel units of the camera's detected images to form one-to-one corresponding temperature detection units. The infrared temperature measurement images during the operation of the rotary kiln are then reprocessed according to the rotational speed to obtain a static shell temperature change image. This method makes the monitoring of the surface temperature of the rotary kiln shell more accurate and facilitates querying and maintenance.

[0005] The technical solution adopted by this invention to solve its technical problem is: a method for detecting the temperature of a rotary kiln shell, comprising the following steps:

[0006] 1) Divide the infrared temperature measurement image of the rotary kiln shell into H (horizontal) × V (vertical) temperature detection units according to the pixel grid;

[0007] 2) The temperature detection unit corresponding to the center line of the rotary kiln is calibrated as the reference busbar temperature detection unit, and its width is denoted as v;

[0008] 3) Set the fixed feature point of the rotary kiln shell as the zero point of the position calibration. The position is zeroed when the zero point of the position calibration coincides with the reference generatrix.

[0009] 4) Collect the rotary kiln rotation speed n (rpm), and collect the reference bus temperature detection unit data set at intervals of 60·v / (π·V·n) seconds;

[0010] 5) The temperature detection values ​​of the continuous [π·V / v] busbar temperature detection units are matched sequentially to form a shell surface temperature detection image;

[0011] 6) When the zero point of the position calibration coincides with the reference bus, the image is refreshed by continuously acquiring the temperature detection unit values ​​of the reference bus again;

[0012] 7) The infrared image display outputs a complete image of the surface temperature detection of the rotary kiln shell, and provides early warning and alarm according to the model.

[0013] Specifically, the device used to generate the infrared temperature measurement image of the rotary kiln shell in step 1) includes an infrared temperature measurement camera, a rotation speed signal acquisition device, an infrared image data processor, and an infrared image display.

[0014] Specifically, in step 1), the infrared temperature measurement image of the rotary kiln shell is obtained by virtually gridding the surface of the rotary kiln shell according to the image pixels and corresponding them one by one with the temperature detection unit.

[0015] Specifically, in step 3), the fixed feature point of the rotary kiln shell is set as the zero point. When it coincides with the reference busbar, the temperature measurement value of the temperature detection unit is continuously collected to perform zeroing.

[0016] Specifically, in step 4), when the rotary kiln rotates at a speed of n (rpm), the infrared image data processor collects the data set of the reference bus temperature detection unit at an interval of 60·v / (π·V·n) seconds.

[0017] Specifically, in step 5), the busbar temperature detection unit matches the numerical values ​​of the [π·V / v] busbar temperature detection units for (60 / n) seconds to form a complete infrared temperature detection image of the rotary kiln shell, and refreshes the image simultaneously when the zero point of the position coincides with the reference busbar.

[0018] The present invention has the following beneficial effects:

[0019] 1. This invention divides the surface of a rotary kiln shell into H (horizontal) × V (vertical) temperature detection units according to a virtual grid of image pixels, sets a reference busbar temperature measurement unit with a width of v, collects the rotary kiln rotation speed n (rpm), and an infrared image data processor collects the reference busbar temperature detection unit value set at an interval of 60·v / (π·V·n) seconds; the value sets of the busbar temperature detection units of (60 / n) seconds are matched in the order of collection to form a complete image of the shell surface temperature detection;

[0020] 2. The inherent feature points of the rotary kiln shell are set as the zero point of the position calibration. When the zero point of the position calibration coincides with the reference generatrix, the image is refreshed at the same time. The temperature detection image of the shell surface is calibrated and matched in a timely manner to ensure that the temperature detection data always corresponds one-to-one with the determined position on the surface of the rotary kiln shell without any deviation. This enables accurate judgment of the temperature change of the rotating rotary kiln shell surface, thereby accurately analyzing the internal refractory condition. Attached Figure Description

[0021] Figure 1 This is a flowchart of a method for detecting the temperature of a rotary kiln shell.

[0022] Figure 2 This is a simplified front view of the rotary kiln.

[0023] Figure 3 This is a view of the surface of the rotary kiln cylinder.

[0024] Figure 4 This is a cross-sectional view of a rotary kiln.

[0025] In the figure: 1-rotary kiln; 2-reference generatrix (v); 3-feature point; 4-drive gear ring; 5-support ring one; 6-support ring two. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0027] like Figure 1-4 As shown, a method for detecting the temperature of a rotary kiln shell involves using an infrared temperature detection camera to collect temperature values ​​from the shell of a pellet rotary kiln. The infrared temperature measurement images of the pellet rotary kiln shell are then gridded according to the pixel units of the camera's detected images to form one-to-one corresponding temperature detection units. The infrared temperature measurement images during the operation of the rotary kiln are then reprocessed according to the rotational speed to obtain images of the temperature changes of the shell at rest. This makes the surface temperature monitoring of the rotary kiln shell more accurate and the query and maintenance more convenient.

[0028] To achieve the above objectives, the present invention employs the following method steps:

[0029] (1) Divide the infrared temperature measurement image of the rotary kiln shell into H (horizontal) × V (vertical) temperature detection units according to the pixel grid;

[0030] (2) The temperature detection unit corresponding to the center line of the rotary kiln is calibrated as the reference bus temperature detection unit, and the width is recorded as v;

[0031] (3) Set the fixed feature point of the rotary kiln shell as the zero point of the position calibration. The position is zeroed when the zero point of the position calibration coincides with the reference generatrix.

[0032] (4) Collect the rotary kiln rotation speed n (rpm), and collect the reference bus temperature detection unit data set at 60·v / (π·V·n) second intervals;

[0033] (5) Match the numerical sets of the continuous [π·V / v] busbar temperature detection units in sequence to form a shell surface temperature detection image;

[0034] (6) When the zero point of the position is aligned with the reference bus, the image is refreshed by continuously acquiring the temperature detection unit values ​​of the reference bus again.

[0035] (7) The infrared image display outputs the surface temperature detection image of the rotary kiln shell, and provides early warning and alarm according to the model.

[0036] The rotary kiln shell temperature detection device includes: an infrared temperature measuring camera, a rotation speed signal acquisition unit, an infrared image data processor, and an infrared image display.

[0037] First, the surface of the rotary kiln shell is divided into H (horizontal) × V (vertical) temperature detection units according to the virtual grid of image pixels. The temperature detection unit corresponding to the center line of the rotary kiln is calibrated as the reference generatrix temperature detection unit, and the width is denoted as v.

[0038] The inherent characteristic points of the rotary kiln shell are set as the zero point for position calibration. When the zero point for position calibration coincides with the reference generatrix, the temperature measurement values ​​of the temperature detection unit are continuously collected to perform position calibration.

[0039] The rotary kiln rotation speed n (rpm) is collected, and the infrared image data processor collects the reference bus temperature detection unit value set at an interval of 60·v / (π·V·n) seconds. The value sets of the bus temperature detection units of the continuous [π·V / v] bus temperature detection units for (60 / n) seconds are matched in the order of collection to form the shell surface temperature detection image. When the zero point of the position coincides with the reference bus, the image is refreshed at the same time.

[0040] The infrared image display outputs a complete image of the rotary kiln shell surface temperature detection, and provides early warnings and alarms according to the pre-set rotary kiln shell surface temperature monitoring model.

[0041] This invention is not limited to the above-described embodiments. Anyone should know that any structural changes made under the guidance of this invention, and any technical solutions that are the same as or similar to this invention, fall within the protection scope of this invention.

[0042] The technologies, shapes, and structures not described in detail in this invention are all known technologies.

Claims

1. A method for detecting the temperature of a rotary kiln shell, characterized in that, Includes the following steps: 1) Divide the infrared temperature measurement image of the rotary kiln shell into H×V temperature detection units according to the pixel grid, where H is the number of temperature detection units in the horizontal direction and V is the number of temperature detection units in the vertical direction; 2) The temperature detection unit corresponding to the center line of the rotary kiln is calibrated as the reference busbar temperature detection unit, and its width is denoted as v; 3) Set the fixed feature point of the rotary kiln shell as the zero point of the position calibration. The position is zeroed when the zero point of the position calibration coincides with the reference generatrix. 4) The rotary kiln rotation speed n (rpm) is collected. The infrared image data processor collects the reference bus temperature detection unit value set at an interval of 60·v / (π·V·n) seconds. The value sets of the bus temperature detection units of the continuous [π·V / v] bus temperature detection units for (60 / n) seconds are matched in the order of collection to form the shell surface temperature detection image. When the zero point of the position coincides with the reference bus, the image is refreshed at the same time to calibrate and match the shell surface temperature detection image in a timely manner, so as to ensure that the temperature detection data always corresponds one-to-one with the determined position on the surface of the rotary kiln shell. 5) The infrared image display outputs a complete image of the surface temperature detection of the rotary kiln shell, and provides early warning and alarm according to the model.

2. The rotary kiln shell temperature detection method according to claim 1, characterized in that, The device used to generate the infrared temperature measurement image of the rotary kiln shell in step 1) includes an infrared temperature measurement camera, a rotation speed signal acquisition device, an infrared image data processor, and an infrared image display.

3. The method for detecting the temperature of a rotary kiln shell according to claim 1, characterized in that, The infrared temperature measurement image of the rotary kiln shell in step 1) is obtained by virtually gridding the surface of the rotary kiln shell according to the image pixels and corresponding them one by one with the temperature detection unit.

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