CN-122017157-A - Method and system for analyzing components of gas discharged from coal gangue pile

CN122017157ACN 122017157 ACN122017157 ACN 122017157ACN-122017157-A

Abstract

The application relates to a method and a system for analyzing the composition of gas discharged from a gangue pile body, and relates to the field of gas analysis, wherein the method comprises the steps of acquiring multi-frame images, temperature, oxygen concentration, carbon monoxide concentration, carbon dioxide concentration and nitrogen oxide concentration at each discharge port on the gangue pile body, determining the first spontaneous combustion intensity in the pile body at each discharge port based on the temperature, the oxygen concentration, the carbon monoxide concentration, the carbon dioxide concentration and the nitrogen oxide concentration, and determining smoke characteristics of each discharge port in each frame of image from the multi-frame image, determining second spontaneous combustion intensity of the interior of the pile body at each discharge port based on the smoke characteristics in each frame of image, and determining the overall spontaneous combustion intensity of the gangue pile body based on the first spontaneous combustion intensity and the second spontaneous combustion intensity of the interior of the pile body at each discharge port. The application realizes that the spontaneous combustion intensity in the gangue pile body is accurately determined according to the exhaust gas of the gangue pile body.

Inventors

WANG ZHIYONG
WANG YIBO
WANG RUIXIA
Zhai Pingquan
SONG GUONING
PEI YADONG
HE ZHIRONG
WANG XUANMIN

Assignees

矸石云(山西)科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260415

Claims (10)

1. A method for analyzing the composition of a gas discharged from a coal gangue pile, comprising: Acquiring multi-frame images, temperatures, oxygen concentration, carbon monoxide concentration, carbon dioxide concentration and nitrogen oxide concentration at each discharge port on a coal gangue pile body; Determining a first auto-ignition severity of the stack interior at each vent based on temperature, oxygen concentration, carbon monoxide concentration, carbon dioxide concentration, and nitrogen oxide concentration; Determining smoke characteristics of each discharge port in each frame of image from the multi-frame images, and determining second spontaneous combustion intensity in the pile body at each discharge port based on the smoke characteristics in each frame of image; The overall spontaneous combustion severity of the coal gangue pile is determined based on the first spontaneous combustion severity and the second spontaneous combustion severity inside the pile at each discharge port.
2. The method of claim 1, wherein determining the first level of spontaneous combustion within the stack at each vent based on temperature, oxygen concentration, carbon monoxide concentration, carbon dioxide concentration, and nitrogen oxide concentration comprises: determining a first concentration ratio of the carbon dioxide concentration to the carbon monoxide concentration; Determining a second concentration ratio of the nitrogen oxide concentration to the oxygen concentration; Determining a sub-intensity value at each drain based on the first concentration ratio, the second concentration ratio, and the temperature; Determining the temperature, the oxygen concentration, the carbon monoxide concentration, the carbon dioxide concentration and the nitrogen oxide concentration as collected data sets, determining a target data set closest to the collected data sets from a plurality of historical data sets in a historical database, wherein each historical data set in the historical database comprises the temperature, the oxygen concentration, the carbon monoxide concentration, the carbon dioxide concentration and the nitrogen oxide concentration, and each historical data set in the historical database corresponds to a spontaneous combustion degree value representing the internal spontaneous combustion intensity; a first auto-ignition level value is determined for the stack interior at each drain based on the sub-severe values and the auto-ignition level value for the target data set.
3. The method of claim 2, wherein determining a target data set closest to the collected data set from a plurality of data sets in a history database comprises: calculating the difference value between each data in the acquired data set and the corresponding data in each historical data set; determining a deviation score for each historical data set based on the difference value for each data and the weight for each data; And determining the historical data set with the smallest deviation score as the closest target data set.
4. The method of claim 1, wherein determining the second intensity of spontaneous combustion in the interior of the pile at each discharge port based on the smoke characteristics in each image comprises: Determining the outline of the smoke feature in each frame of image, and determining the outline area of the smoke feature in each frame of image; Determining the area of the discharge port from the multi-frame images corresponding to each discharge port, and determining the target ratio of the outline area of the smoke feature in each frame of image to the area of the discharge port; Calculating a ratio average value of target ratios corresponding to all frame images; Sequentially calculating the outline similarity of smoke features of two adjacent frames of images according to the time sequence of the multi-frame images; Determining a similarity average value and a similarity variance of all profile similarities corresponding to each discharge port; and determining a second spontaneous combustion intensity in the stack body at each discharge port based on the ratio average value, the similarity average value and the similarity variance.
5. The method for analyzing the gas composition of the coal gangue pile according to claim 1 or 4, further comprising: Carrying out gray level transformation on each frame of image of each discharge port to obtain a gray level image corresponding to each frame of image; Determining a gray value of each pixel in a contour range of the smoke feature in each gray image, and determining a first gray value average value of the smoke feature in each gray image based on the gray value of each pixel; Averaging the first gray value average value in all the frame images of each discharge port to obtain a first target average value; Extending upwards from the discharge port area of each frame of image to obtain a designated area above the discharge port, and determining a second gray value average value of smoke characteristics in the designated area; determining a third gray value average value of smoke characteristics outside a designated area from each frame of image; averaging the second gray value average value in all the frame images of each discharge port to obtain a second target average value, and averaging the third gray value average value in all the frame images of each discharge port to obtain a third target average value; Determining a ratio of the second target average value to a third target average value, and determining a correction value of the second spontaneous combustion intensity of each discharge port based on the first target average value and the ratio of the second target average value to the third target average value; and summing the corrected value and the second spontaneous combustion intensity value to obtain the corrected second spontaneous combustion intensity value of each discharge port.
6. The method of claim 1, wherein determining the overall severity of spontaneous combustion of the coal gangue pile based on the first severity of spontaneous combustion and the second severity of spontaneous combustion within the pile at each discharge port, comprises: determining a total auto-ignition severity of the interior of the stack at each discharge port based on the first auto-ignition severity, the second auto-ignition severity, and the respective weights; And averaging the total spontaneous combustion intensity of the inside of the pile body at all the discharge ports to obtain the total spontaneous combustion intensity of the gangue pile body.
7. The method of analyzing a gas composition of a coal gangue pile according to claim 1, further comprising: And sending the overall spontaneous combustion intensity of the gangue pile body to terminal equipment of staff.
8. A system for analyzing a gas composition in a coal gangue pile, comprising: The data acquisition module is used for acquiring multi-frame images, temperatures at each discharge port on the gangue pile body, and oxygen concentration, carbon monoxide concentration, carbon dioxide concentration and nitrogen oxide concentration in each discharge port; a first determination module for determining a first auto-ignition severity of the interior of the stack at each vent based on temperature, oxygen concentration, carbon monoxide concentration, carbon dioxide concentration, and nitrogen oxide concentration; The second determining module is used for identifying the smoke characteristics of each discharge port in each frame of image from the multi-frame image and determining the second spontaneous combustion intensity of the interior of the pile at each discharge port based on the smoke characteristics in each frame of image; and the third determining module is used for determining the integral spontaneous combustion intensity of the gangue pile body based on the first spontaneous combustion intensity and the second spontaneous combustion intensity in the pile body at each discharge port.
9. The system of claim 8, wherein the first determining module is configured to, when determining the first severity of auto-ignition in the interior of the pile at each discharge port based on the temperature, the oxygen concentration, the carbon monoxide concentration, the carbon dioxide concentration, and the nitrogen oxide concentration: determining a first concentration ratio of the carbon dioxide concentration to the carbon monoxide concentration; Determining a second concentration ratio of the nitrogen oxide concentration to the oxygen concentration; Determining a sub-intensity value at each drain based on the first concentration ratio, the second concentration ratio, and the temperature; Determining the temperature, the oxygen concentration, the carbon monoxide concentration, the carbon dioxide concentration and the nitrogen oxide concentration as collected data sets, determining a target data set closest to the collected data sets from a plurality of historical data sets in a historical database, wherein each historical data set in the historical database comprises the temperature, the oxygen concentration, the carbon monoxide concentration, the carbon dioxide concentration and the nitrogen oxide concentration, and each historical data set in the historical database corresponds to a spontaneous combustion degree value representing the internal spontaneous combustion intensity; a first auto-ignition level value is determined for the stack interior at each drain based on the sub-severe values and the auto-ignition level value for the target data set.
10. The system for analyzing the gas composition of the coal gangue pile according to claim 9, wherein the first determining module is configured to, when determining a target data set closest to the collected data set from a plurality of data sets in the history database: calculating the difference value between each data in the acquired data set and the corresponding data in each historical data set; determining a deviation score for each historical data set based on the difference value for each data and the weight for each data; And determining the historical data set with the smallest deviation score as the closest target data set.

Description

Method and system for analyzing components of gas discharged from coal gangue pile Technical Field The application relates to the field of gas analysis, in particular to a method and a system for analyzing components of gas discharged from a gangue pile. Background A large amount of gangue solid waste generated in the coal mining process is usually stored in the open air, so that a gangue pile is formed. Because the coal gangue pile body contains combustible substances such as coal dust, combustible minerals and the like, the combustible substances undergo oxidation reaction and spontaneous combustion in the pile body. When spontaneous combustion occurs in the stack, gas is discharged, flows through gaps in the stack and rises to the surface of the stack, and finally is discharged to the atmosphere from a discharge port in the surface of the stack. The gas emission caused by spontaneous combustion of the gangue pile reflects the intensity of spontaneous combustion in the pile to a certain extent, so how to accurately determine the intensity of spontaneous combustion in the gangue pile according to the gas emission degree of the gangue pile becomes a problem. Disclosure of Invention In order to accurately determine the spontaneous combustion intensity in the gangue pile body according to the gangue pile body exhaust gas, the application provides a method and a system for analyzing the gangue pile body exhaust gas components. In a first aspect, the application provides a method for analyzing components of gas discharged from a coal gangue pile, which adopts the following technical scheme: a method for analyzing the components of gas discharged from a coal gangue pile comprises the following steps: Acquiring multi-frame images, temperatures, oxygen concentration, carbon monoxide concentration, carbon dioxide concentration and nitrogen oxide concentration at each discharge port on a coal gangue pile body; Determining a first auto-ignition severity of the stack interior at each vent based on temperature, oxygen concentration, carbon monoxide concentration, carbon dioxide concentration, and nitrogen oxide concentration; identifying smoke characteristics of each discharge port in each frame of image from the multi-frame images, and determining second spontaneous combustion intensity of the interior of the pile at each discharge port based on the smoke characteristics in each frame of image; The overall spontaneous combustion severity of the coal gangue pile is determined based on the first spontaneous combustion severity and the second spontaneous combustion severity inside the pile at each discharge port. By adopting the technical scheme, the multi-frame image, the temperature, the oxygen concentration and other data at each discharge port are convenient for analyzing the gas components in each discharge port, the temperature, the oxygen concentration, the carbon monoxide concentration and other data are the specific components, the concentration, the temperature performance and other characteristics of the discharged gas, the first spontaneous combustion intensity in the pile at each discharge port can be accurately analyzed according to the temperature, the oxygen concentration, the carbon monoxide concentration and other data, the multi-frame image records the smoke performance formed by the gas discharged by each discharge port, so that the smoke characteristics at each discharge port are identified from the multi-frame image, the second spontaneous combustion intensity in the pile at each discharge port can be accurately determined according to the smoke characteristics in the multi-frame image, and finally the whole spontaneous combustion intensity in the pile can be accurately obtained according to the comprehensive analysis of the first spontaneous combustion intensity and the second spontaneous combustion intensity, namely the whole spontaneous combustion intensity in the pile can be obtained comprehensively from the component analysis and the smoke characteristic analysis of the discharged gas at the discharge port. In another possible implementation, the determining the first level of auto-ignition severity inside the stack at each vent based on the temperature, the oxygen concentration, the carbon monoxide concentration, the carbon dioxide concentration, and the nitrogen oxide concentration includes: determining a first concentration ratio of the carbon dioxide concentration to the carbon monoxide concentration; Determining a second concentration ratio of the nitrogen oxide concentration to the oxygen concentration; Determining a sub-intensity value at each drain based on the first concentration ratio, the second concentration ratio, and the temperature; Determining the temperature, the oxygen concentration, the carbon monoxide concentration, the carbon dioxide concentration and the nitrogen oxide concentration as collected data sets, determining a target data set closest to the collected data sets fr