On-line coal quality property detection device

Abstract

The invention relates to an on-line coal quality property detection device. The on-line coal quality property detection device is characterized by comprising a coal powder sampling subsystem, a coal powder cake pressing subsystem and a spectrum collecting and analyzing subsystem. According to the on-line coal quality property detection device, the coal powder sampling subsystem is firstly utilized to acquire low-rank coal powder from a wind powder pipeline installed between an exit of a coal mill of a coal-fired power generation unit and an entrance of a combustor, then the coal powder cake pressing subsystem is utilized to prepare the coal powder in a pressing mode into coal cakes specified in measurement requirements, and then a spectrum detecting system is utilized to detect the coal quality properties of the coal cakes. According to the on-line coal quantity property detection device, by performing cake pressing on the coal powder, the influence of the rough coal powder surface on measurement is eliminated, the overall device can easily achieve accurate and reliable on-line coal quality property detection in a spot environment, and therefore the device is beneficial for improving the burning efficiency of the coal-fired power generation unit and reducing pollutant discharging.

Description

technical field [0001] The invention relates to an online detection device for coal quality characteristics, which belongs to the technical field of spectrum diagnosis and measurement. Background technique [0002] In recent years, with the continuous improvement of the country's energy-saving and emission-reduction requirements for thermal power units, how to achieve more efficient, environmentally friendly and safe operation of power plant boilers has become the most concerned issue for coal-fired power plants. However, due to the variety of coal types in my country and the complex and diverse characteristics of coal quality, the coal quality of power plant boilers varies greatly. However, my country's power plants still use the traditional method of manual sampling, sample preparation and laboratory offline analysis for coal quality testing. Since this method cannot obtain the coal quality characteristics of the coal that is fed into the furnace in time, the boiler opera...

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Problems solved by technology

However, due to the pulsation of solid particles in the gas-solid two-phase flow in the former method, the interaction between the laser and the solid particles is unstable, resulting in poor precision and accuracy of LIBS measurement; the latter method is due to the unevenness of the measurement surface of the accumulated particles. , and when the laser hits the surface of the accumulated particles, it will cause particle splashing, which also leads to poor precision and accuracy of LIBS measurement

For the on-line measurement of coal pulverized into the furnace, the above methods are not conducive to the accurate and reliable coal quality measurement of the LIBS coal quality on-line detection device

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