Journal of Shandong University(Engineering Science) ›› 2022, Vol. 52 ›› Issue (3): 109-116.doi: 10.6040/j.issn.1672-3961.0.2022.004

• Chemistry and Environment • Previous Articles     Next Articles

Preparation method and system of engineering nanoparticle aerosol

Yi HAN(),Zhen XU,Tian GUAN,Yang CUI,Hui HU,Liming MA   

  1. School of Automobile, Chang′an University, Xi′an 710064, Shaanxi, China
  • Received:2021-12-31 Online:2022-06-20 Published:2022-06-23

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Abstract:

A carbon nanoparticle aerosol preparation system with adjustable flow rate and mass concentration was designed based on the atomization method of nanomaterial suspension. The clean air and carbon nanotube material dispersion were sprayed and mixed in a stainless steel atomizing chamber to obtain an unstable aerosol. With the embedded temperature control system, flow control system and mass concentration control system, the unstable aerosol could be heated at a constant temperature in expansion chamber. Then the unstable aerosol expanded rapidly and reached uniformity. A relatively stable and uniform nanoparticle aerosol flow was obtained by controlling the valve body with an adjustable opening. It was demonstrated by experiments that under the condition of ideal temperature control system, the maximum error between the flow rate and the set value was 9.312 mL/min, and the maximum error between the mass concentration and the set value was 0.206 mg/m3. Nanoparticle aerosol with stable flow and mass concentration was generated basically.

Key words: engineering nanoparticle, aerosol, preparation method, flow control, mass concentration control

CLC Number: 

  • TB302.1

Table 1

Working parameters of precision peristaltic pump BT100-2J"

转速/(r·min-1) 通信接口 长×宽×高/(mm×mm×mm) 电压/V 工作温度/℃ 最大参考流量/(mL·min-1)
0.1~100 RS485 232×141×149 90~260 0~40 270

Fig.1

Peristaltic pump"

Fig.2

Thermal resistance"

Table 2

Thermal resistance parameters of PT100"

工作温度/℃ 标称电阻/Ω 长期稳定性/h 推荐工作电流/mA
-200~600 100 1000 0.5

Fig.3

Ultrasonic atomizing nozzle"

Fig.4

Inhalable particulate matter detector"

Fig.5

Aerosol generator system structure"

Fig.6

Embedded control system"

Fig.7

Control flow of constant temperature heating system"

Fig.8

Temperature curve of constant temperature heating system"

Fig.9

Flow control system control flow chart"

Fig.10

Flow control system curve"

Fig.11

Mass control flow of concentration control system"

Fig.12

Concentration control system curve"

Fig.13

Upper computer control system software interface diagram"

Fig.14

Aerosol generating equipment"

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