Journal of Japan Society for Safety Engineering
Online ISSN : 2424-0656
Print ISSN : 0570-4480
ISSN-L : 0570-4480
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Volume 59, Issue 3
JOURNAL OF JAPAN SOCIETY FOR SAFETY ENGINEERING_2020_3
Displaying 1-12 of 12 articles from this issue
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PROPOSAL FOR SAFETY
REVIEW
ORIGINAL PAPER
  • Conductivity Dependence on Spray Electrification of Flammable Solvent
    Yuta Endo
    2020 Volume 59 Issue 3 Pages 175-183
    Published: June 15, 2020
    Released on J-STAGE: June 15, 2020
    DOIhttps://doi.org/10.18943/safety.59.3_175
    JOURNAL FREE ACCESS
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    The spray electrification of liquid sprayed from nozzles, that may cause explosions or fires in facilities handling combustible organic solvent, was experimentally investigated. The effects of conductivity were examined with the low conductivity liquid （mineral spirit） by adding the conductivity improving additive and it varied from 10-13 to 10-6 S/m. The charge generated by the spray electrification with the two types of 1-fluid nozzles （stainless steel made nozzle and PTFE made nozzle） was measured. Measurement results showed the charge of the spray nozzle and the sprayed liquid depended strongly on the conductivity and became maximum at 10-9-10-7 S/m. The charge of the stainless steel made nozzle became about half as large as the maximum value even at the high conductivity of 10-6 S/m. These results showed a possibility that the controlling the conductivity of liquid at around 10-10 S/m can reduce the spray electrification by about one digit of the maximum value.

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TECHNICAL REPORT
SAFETY MANAGEMENT AND PROVISIONS IN THE CORPORATION
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