Manufacturing and usage methods of membrane taking device for TSP (Total Suspended Particulates) collector with PM5 and PM2.5 sampling heads

Abstract

The invention belongs to the field of environmental protection equipment, and particularly relates to manufacturing and usage methods of a membrane taking device for a TSP (Total Suspended Particulates) collector with PM5 and PM2.5 sampling heads. The membrane taking device is mainly composed of an annular filter membrane support plate and two tweezers ears integrated with the annular filter membrane support plate, wherein the shape and size of the annular filter support plate coincide with the shape and size of the bottom plane of an annular groove of the TSP collector with the PM5 and PM2.5sampling heads; the annular filter support plate is made of a film with the thickness of 0.2 to 0.4 mm; the two tweezers ears are extension parts of the annular filter support plate, and are symmetrically arranged on the outer-circle arc edge of the annular filter membrane support plate. By using the device, a filter membrane can be taken conveniently and completely from the annular groove of theTSP collector, an annular filter membrane is prevented from breaking in a membrane taking process, and the accuracy of sampling data is ensured.

Description

technical field [0001] The invention belongs to the field of environmental protection equipment, and in particular relates to a method for manufacturing and using a PM5 and PM2.5 sampling head TSP collector film-taking device. Background technique [0002] In the process of using the MH1210 multi-stage particle sampler sampling head TSP collector to collect samples of suspended particulates PM5 and PM2.5 in the atmosphere, it is first necessary to place an annular filter membrane in the annular groove of the TSP collector for sampling. The requirements of the filter membrane are: put the annular filter membrane flatly on the bottom plane of the annular groove, and the two inner and outer ring edges of the annular filter membrane closely fit with the two upward-turned ring edges inside and outside the annular groove of the TSP collector . After the sampling is finished, the annular filter membrane placed in the annular groove of the TSP collector needs to be completely taken...

AI Technical Summary

Problems solved by technology

After the sampling is finished, the annular filter membrane placed in the annular groove of the TSP collector needs to be completely taken out for weighing. In this process, the following problems exist: due to the bottom plane of the annular groove of the TSP collector and the raised ring edges on both sides There is a right angle between them and the height of the ring edge is about 14.0 mm to 14.5 mm. The ring filter membrane placed in it is closely attached to the bottom and side of the deeper ring groove after being impacted by the air flow during the sampling process. It is difficult to take out the annular filter membrane evenly and completely during the process of taking out the filter membrane

The usual method is to use a long needle to pierce the filter membrane and use it with tweezers to move and take out the filter membrane. During this process, the annular filter membrane is often severely deformed or even ruptured.

Severe deformation or rupture of the filter membrane will cause some of the particles adsorbed on the filter membrane to fall off, resulting in errors in sampling data and directly affecting the accuracy of sampling data. There are hidden dangers of inconvenient membrane extraction and inaccurate sampling data.

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