Method and device for rapidly testing coal quality components of coal-fired power plant on line

Abstract

The invention relates to a fire coal quality measurement technology, and aims to provide a method and a device for rapidly testing coal quality components of a coal-fired power plant on line. The method comprises the steps of extracting pulverized coal from a pulverized coal pipeline of a coal-fired power plant, separating and capturing pulverized coal particles through a cyclone separator, and evenly mixing and then dividing the pulverized coal particles into two parts; measuring the moisture, ash content, volatile component and fixed carbon content of one part of the pulverized coal through industrial analysis based on temperature programming weighing metering; measuring the concentrations of C, H, O, N and S elements in the other part of pulverized coal through elemental analysis based on laser-induced breakdown spectroscopy; and calculating the calorific value of the fire coal by combining the two measurement results. According to the device and the method, the content of water, ash, volatile components and fixed carbon and the concentration of C, H, O, N and S elements of fire coal can be measured at the same time, and real-time monitoring and operation parameter adjustment of a coal-fired power plant are facilitated. A more accurate and reliable fire coal calorific value calculation result can be obtained, so that continuous online fire coal calorific value analysis of a coal-fired power plant is realized.

Description

technical field [0001] The invention relates to the technical field of coal quality measurement, in particular to an online rapid measurement of coal quality components in a coal-fired smart power plant. Background technique [0002] Among the coal quality evaluation indicators of coal-fired power plants, coal moisture, ash, volatile matter, sulfur, nitrogen content, and calorific value are key indicators. Among them, moisture will affect the calorific value of coal-fired and coal-fired storage and transportation, volatile matter will affect the stable combustion of the boiler, and ash will not only affect the calorific value of coal-fired coal, but also affect the slagging, contamination, and wear of the boiler. The sulfur content in the coal-fired power plant is the main source of sulfur dioxide emissions. The nitrogen content affects the emission of nitrogen oxides in the flue gas. Both of them will cause environmental pollution. The calorific value of coal combustion wil...

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Problems solved by technology

However, this method can only obtain the elemental composition, and the volatile matter and ash content are fitted by the model, which is not directly measured, and the error is large; in addition, the most important moisture cannot be obtained, and the obtained elemental composition cannot be converted to the standard coal quality analysis requirements air-dry basis, received basis, dry ash-free basis and other standard values

[0005] The other is to directly use the industrial analysis results of coal to calculate the calorific value. Calculating the calorific value using the industrial analysis results of coal requires measuring the moisture, ash, and volatile matter in the coal. The measurement takes a long time, and the accuracy of the calculation results is limited by the coal. kind of influence

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