Full-automatic powder tube sampling device and method for LIBS coal quality online analysis

Abstract

The invention discloses a full-automatic powder tube sampling device and method for LIBS coal quality online analysis. The device comprises a vacuum suction tank, a plurality of pulverized coal pipelines and a vortex fan, wherein the vacuum suction tank is provided with a plurality of suction ports, a negative-pressure suction port, a discharge port and a pulse back-flushing filter element port; the pulverized coal pipelines are communicated with the suction ports in a one-to-one correspondence manner through long-distance pipelines; the vortex fan is communicated with the negative-pressure suction port. The device further comprises a blanking assembly communicated with the feed opening and a second back flushing assembly communicated with the pulse back flushing filter element opening. The long-distance pipeline is sequentially provided with a manual ball valve, a first two-way pneumatic ball valve with a first electromagnetic valve, a first back flushing assembly and a second two-way pneumatic ball valve with a second electromagnetic valve in the pulverized coal taking direction; and a first three-way pneumatic ball valve which is communicated with the atmosphere and is provided with a third electromagnetic valve is also arranged between the vortex fan and the negative-pressure exhaust inlet. According to the invention, long-distance quick automatic switching sampling is carried out on the pulverized coal pipeline, finally, multi-channel quick sampling and zero sample mixing can be met, and finally, efficient sampling of the pulverized coal pipeline can be realized.

Description

technical field [0001] The invention relates to a sampling device in the field of coal quality online analysis, in particular to a fully automatic powder pipe sampling device and method for LIBS coal quality online analysis. Background technique [0002] In the prior art, when the coal quality off-line analysis is used to analyze data, the coal samples used need to be manually sampled from the powder outlet of the coal quality powder pipe, and then transported to the coal quality analyzer, which will cause Pulverized coal leaks, resulting in poor air quality inside and outside the instrument; at the same time, after taking a coal sample, there will be residual coal powder accumulated at the powder outlet of the coal powder pipe. When sampling other pulverized coal next time, It will cause coal sample pollution, which will seriously affect the accuracy and service life of the measurement data of the analytical instrument; and in the existing technology, the accumulated coal p...

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Problems solved by technology

[0002] In the prior art, when the coal quality off-line analysis is performed to analyze the data, the coal samples used need to be manually sampled from the powder outlet of the coal quality powder pipe, and then Transported to the coal quality analyzer, and the coal powder will leak during the transportation, resulting in poor air quality inside and outside the instrument; at the same time, after taking a coal sample, there will be residual coal powder accumulated in the coal powder pipe At the powder outlet, when other pulverized coal is sampled next time, it will cause coal sample pollution, which will seriously affect the accuracy and service life of the measurement data of the analytical instrument; The accumulated pulverized coal needs to be cleaned manually at regular intervals. When there are a lot of analysis data, the pulverized coal should be cleaned every 3 hours on site, which is inefficient and seriously affects production.

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