LIBS (Laser-induced Breakdown Spectroscopy) intelligent online rapid detection system for coal quality

Abstract

An LIBS (Laser-induced Breakdown Spectroscopy) intelligent online rapid detection system for coal quality comprises eight modules of a sampling system, a sample delivery system, a drying system, a crushing system, a material-sucking and cake-pressing system, a cake delivery system, an LIBS detection system and a packaging and coding system, wherein the sampling system is used for acquiring a total-moisture coal sample and sending the total-moisture coal sample to the sample delivery system; the sample delivery system delivers the coal sample to the drying system; the drying system controls themoisture of the total-moisture coal sample within a certain range; the crushing system is used for grinding the coal sample subjected to the drying system to obtain pulverized coal; the cake-pressingsystem is used for completing pressing of coal cakes; the cake delivery system sends the two pressed coal cakes to the LIBS detection system and the packaging and coding system, respectively; the LIBS detection system is used for detecting one of the coal cakes; and the packaging and coding system is used for completing automatic packaging and code spraying of the two coal cakes. According to theLIBS intelligent online rapid detection system for the coal quality provided by the invention, the effect that the charging coal quality of a coal-fired power plant is analyzed and detected timely, rapidly and accurately is implemented; the modular design is adopted; and the intelligent online rapid detection system is suitable for use of different combinations under various working conditions and is convenient to install and maintain.

Description

technical field [0001] The invention relates to the field of coal quality analysis and inspection in coal-fired power plants, in particular to a LIBS online intelligent rapid detection system for coal quality. Background technique [0002] Coal quality analysis in coal-fired power plants is to use physical and chemical methods to test and test coal samples, which are generally completed in laboratories. Batches of coal to be analyzed coal samples need to go through primary sampling, crushing, shrinking, sample collection, sample preparation and other links. Laboratory coal quality analysis requires several steps, and the process of each step is long or short. It takes a long time to obtain the final coal quality test report, generally about 24 hours. [0003] The power plant fuel management work must be carried out strictly according to the coal quality test report, such as coal yard zoning management, classified storage, coal yard coal blending, coal yard coal storage, cal...

AI Technical Summary

Problems solved by technology

At present, the time for coal quality analysis in the laboratory to produce a report is seriously lagging behind the unloading of coal entering the factory and the storage of coal entering the furnace. The traditional solution is to replace the average value of historical data, but the error is large and there are many mistakes, so it cannot be used as a Real-time guidance basis for digital coal yard management. Once abnormal coal quality occurs, the management process is irreversible and cannot be corrected.

For coal yard management, it is easy to lead to digital coal yard data distortion and coal yard management failure; for coal blending warehouse, it may lead to unstable combustion of boilers, frequent adjustments are difficult, and burn nozzles and primary air ducts may occur in severe cases. Accidents such as failure, explosion of pulverizing system, etc.

[0004] The composition and characteristics of coal quality have an extremely important impact on the safe, economical production and environmental protection of coal-fired power plants. The quality of coal in most coal-fired power plants cannot be guaranteed, and there are many types of coal that change frequently, resulting in insufficient boiler output and heat loss. Larger, boiler coking, ash accumulation, flameout, etc. occur from time to time, the quality of coal entering the furnace has a great impact on the safety and economy of unit operation, and the mixed combustion of coal makes it difficult to accurately judge the quality of coal entering the furnace

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