A method for in-situ identification and rapid quantification of coal rock microcomponents

Abstract

The invention discloses a method for in-situ identification and rapid quantification of coal rock microcomponents. Firstly, a variety of standard coals of different coal ranks are selected for industrial analysis, petrographic analysis and Raman spectrum surface scanning to obtain dry ash-free base volatile Content V daf , microscopic component type determination results and Raman characteristic parameters; select several Raman characteristic parameters for cluster analysis, draw a heat map according to the clustering results, compare the heat map with the petrographic analysis results, and determine the corresponding color of the heat map Microscopic component type; Raman characteristic parameters and V daf Establish the corresponding relationship, determine the threshold interval of the Raman characteristic parameters of different microscopic components of each coal rank, and establish the in-situ identification criteria of the microscopic components according to this interval; during detection, the coal to be tested is subjected to industrial analysis and Raman testing, The microscopic components can be identified by using the above criteria, and then the content of the corresponding microscopic components can be determined according to the proportion of each color point in the heat map. The invention has simple experiment and data processing methods, rapid and accurate detection.

Description

technical field [0001] The invention belongs to the field of clean and efficient utilization of coal, and relates to a coal rock microcomponent identification technology, in particular to an in-situ identification and rapid quantitative method for coal rock microcomponents. Background technique [0002] The resource endowment of "rich coal, poor oil, and little gas" determines my country's coal-based energy consumption structure. Due to its own structural characteristics, coal will bring a series of environmental pollution problems in the process of utilization, such as: nitrogen oxides, sulfur oxides and particulate matter emissions, and greenhouse gas effects. Therefore, the clean and efficient utilization of coal is a sustainable major needs for development. [0003] Coal is a structurally heterogeneous body, and the heterogeneity of its chemical structure has a significant impact on the thermal conversion characteristics of coal. In microscopic coal petrology, coal can...

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Problems solved by technology

This technology is still based on image recognition. The biggest problem with image recognition is that the repeatability is not high. Different exposure parameters and different external lighting environments will cause large structural errors, especially in external lighting environments. It is difficult to maintain a stable environment in the industry. , relatively stable analysis results can be obtained in the laboratory environment, but the actual industrial environment has a lot of interference and poor repeatability, which makes it impossible for industrial application

However, there is currently no technology that uses microscopic Raman spectroscopy surface scanning technology for the analysis of raw coal microcomponents. If Raman spectroscopy surface scanning technology is combined with petrographic analysis, the characteristics of rapid, accurate and undisturbed Raman analysis can be combined with The combination of slow petrographic analysis but accurate results can create an in-situ identification and quantitative analysis technology for coal and rock microcomponents with high accuracy and fast identification speed

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