Abstract
For the purpose of estimating the performance of electrostatic precipitators, a method for measuring the resistivity of stack dust has been investigated using a newly developed automatic measuring system, in which a test cell with parallel plate electrodes is adopted and a moisture monitor using a zirconia sensor is installed. The moisture was generated by the water drop evaporation method.As measuring conditions, the equilibrium times at which air temperature and moisture content in the constant temperature chamber reach the values set in advance are 20 and 40 minutes, respectively, and a high voltage is impressed on the test cell. Therefore, when increasing the temperature stepwise up to 350°C at a constant moisture the retaining time should be 20 minutes.The dust resistivity increases as measuring time elapses, depending on the kind of dust samples and the operation conditions, reaching its equilibrium in 60 minutes at the longest. The equilibrium time is 20 minutes when both the loading pressure and the measuring pressure for the dust sample in the test cell are equally set at a constant value of 980Pa.It was found that an electric field strength of 400kV/m was reasonable for the standard measurement, while the field strength in the conventional electrostatic precipitators is presumed to be in the range of 200-800kV/m
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of the Society of Powder Technology, Japan
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
