Sampling device for preventing adsorption of smoke particulate matters

Abstract

The invention discloses a sampling device for preventing smoke dust particulate matter from being adsorbed, and belongs to the technical field of particulate matter sampling. Comprising a metal sampling tube group which comprises a first sampling tube, a second sampling tube, a third sampling tube and a fourth sampling tube which are connected in sequence; wherein the far end of the first sampling pipe extends into a flue to be detected, and the near end of the fourth sampling pipe is connected with a particulate matter measuring module; the static electricity generating device comprises a main machine part, a first static electricity output end, a second static electricity output end and a third static electricity output end, the first static electricity output end and the second static electricity output end are the same in polarity, the first static electricity output end and the third static electricity output end are opposite in polarity, and the first static electricity output end extends into the second sampling pipe; the second electrostatic output end is electrically connected with the third sampling tube; and the third electrostatic output end extends into the fourth sampling pipe. The sampling device solves the problem of poor measurement accuracy caused by the fact that particulate matters are easily adsorbed on a pipe wall of an existing sampling device.

Description

technical field [0001] The invention relates to the field of fixed pollution source sampling, in particular to a sampling device for preventing the adsorption of soot particles. Background technique [0002] With the improvement of the domestic environment, the concentration of particulate matter in soot, especially in fixed pollution sources, is getting lower and lower, and many enterprises have ultra-low emissions. At this time, detecting the concentration of particulate matter emitted by enterprises puts forward higher requirements for detection methods. At present, the commonly used detection methods are the gravimetric method and the β-ray direct reading method. The gravimetric method has complicated procedures, requires repeated drying and weighing, and has a long detection cycle. The β-ray direct reading method can read the particle concentration on the spot, and it has been paid more and more attention. In the method, the sampling pipe is deep into the sampling ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that in the existing β-ray concentration measuring device, some particles are adsorbed on the inner wall of the sampling tube, resulting in poor measurement accuracy.

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