On-line monitoring system of coal characteristics of as-fired coal

Abstract

The invention discloses an on-line monitoring system of coal characteristics of as-fired coal. The on-line monitoring system of the coal characteristics of the as-fired coal comprises a sampling unit, a plasma spectrum analysis unit, a sample storage unit, a three-way particle flow measuring unit and a sample returning unit, wherein one end of the sampling unit is connected into an as-fired coal powder pipeline; the other end of the sampling unit is connected to one interface of the three-way particle flow measuring unit; the plasma spectrum analysis unit is connected to another interface of the three-way particle flow measuring unit; the sample returning unit is connected between a third interface of the three-way particle flow measuring unit and the as-fired coal powder pipeline; the sample storage unit is connected between the third interface of the three-way particle flow measuring unit and the sample returning unit or is connected between the sampling unit and the three-way particle flow measuring unit. The on-line monitoring system of the coal characteristics of the as-fired coal is simple in structure, free of complex sampling pipelines and few in mechanical moving parts; the reliability of long-term operation of the on-line monitoring system can be improved, and the as-fired coal does not need to be measured after being tableted (cake-pressed).

Description

technical field [0001] The invention relates to an on-line monitoring system for coal quality characteristics of furnace coal, which belongs to the technical field of on-line monitoring. Background technique [0002] In the pulverized coal pipeline of the coal-fired power station, the pulverized coal flows in the pipeline in a gas-solid two-phase state. On-line monitoring of the coal quality characteristics of the coal into the furnace is conducive to improving the real-time optimization control level of boiler operation and realizing efficient and low-pollution combustion of coal-fired boilers. At present, the traditional off-line chemical analysis method is mainly used for the measurement of the coal quality characteristics of the furnace coal. The entire cycle of this method from sampling, sample preparation to analysis generally takes several hours, and the measurement results seriously lag behind the industrial process. In recent years, X-ray fluorescence spectroscopi...

AI Technical Summary

Problems solved by technology

Judging from the structure of the above-mentioned device, since pulverized coal needs to be pressed into cakes, the whole system will be more complicated, there will be a large number of mechanical moving parts, the amount of daily maintenance will increase, and the reliability of the long-term operation of the system will be reduced.

In addition, the patent uses a single pulsed laser to excite the sample to form a plasma, which has certain limitations in the adaptability to different working conditions and coal powders produced in different places.

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