Pollution source fine particulate matter dilution sampling method and device
A technology for fine particles and pollution sources, which is applied in the field of dilution sampling of fine particles of pollution sources, which can solve the problems of simultaneous collection, sampler volume, weight cost, increased energy consumption, labor and labor, etc.
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[0034] Example 1
[0035] This embodiment is a pollution source four-channel PM 10 , PM 2.5 Synchronous sampling device, such as figure 1 , figure 2 , image 3 Shown. The device includes: sampling nozzle 1, sampling tube 2, pitot tube 3, heating device 4, diluter 5, retention chamber 6, temperature sensor Tc 7, pressure sensor P c 8. PM 10 Particle cutter 9, splitter 11, PM 2.5 Particle cutter 13, PM 2.5 Sampling filter membrane (m 3 , M 4 ) 14. Automatic film changing device 15, flow sensor q (q 1 , Q 2 , Q 3 , Q 4 ) 16, three-way pipe 17, solenoid valve (f 1 , F 2 ) 18. PM 2.5 Sampling pump 19, PM 10 Sampling pump 20, dilution gas pipeline 26, humidity sensor 27, pipeline temperature sensor T s 28. Pitot tube differential pressure sensor △P 1 29, pipeline pressure sensor Ps 30, temperature sensor T g 31. Pressure sensor P d 32, PM 10 Sampling filter membrane (m 1 , M 2 ) 34, single-chip microcomputer 35, display 36, keyboard 37, communication interface 38; the sampling nozzl
Example Embodiment
[0057] Example 2
[0058] The embodiment of the present invention is a six-channel PM 10 , PM 2.5 Synchronous sampling device, collect 3 PM at the same time 10 , PM 2.5 sample. In PM 10 After the particle cutter is connected in series with a splitter, 3 splitter outlet pipes are required to connect with 3 PM 10 Sampling filter membrane in series, PM 2.5 The air intake pipe of the particle cutter extends into the inside of the splitter, PM 2.5 Connect 3 PMs in series after the particle cutter 2.5 Sampling filter membrane, PM 10 Sampling filter and PM 2.5 The outlet of the sampling filter is respectively connected in series with the flow sensor q, the solenoid valve, and the sampling pump. The technical principle and measurement and control scheme are the same as those in Example 1.
[0059] The device of the present invention is also suitable for collecting other particle size particles, harmful gases, smoke, SVOCs samples and ambient air in the pipeline.
[0060] In summary, the prese
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