Low dust resistivity in an electrostatic precipitator means dust is readily collectable, but re-entrainment can become a problem and precipitator performance is compromised. On the other hand, high dust resistivity results in difficult-to-charge particles and back corona issues that can also compromise performance. Neundorfer can assist with avoiding either extreme by analyzing and predicting particle resistivity for optimal ESP performance:
- Helps to understand processes contributing to high outlet emissions (i.e. opacity), using this information to create solutions
- Indicates actions that can improve performance and how much improvement to expect
- Provides quantitative resistivity input into precipitator performance models (through the Neundorfer predictive performance modeling service)
- Delivers customized reporting and recommendations to improve collection efficiency
- Creates criteria of precipitator performance input into fuel purchases or other process changes
Neundorfer can predict resistivity based on specific temperatures, fuel types, usage of conditioning agents and other conditions unique to each ESP configuration, helping out customers pinpoint the fly ash resistivity "sweet spot" to optimize collection efficiency and ESP performance.
How To Get Started
Neundorfer needs dust samples from your precipitator in order to conduct fly ash resistivity testing. Samples can be provided in three ways:
- Dust samples collected from each in a row of hoppers, in the direction of gas flow (taking care not to capture any scrapings from the hopper wall)
- Blended sample from the ash line (if collection from individual hoppers is possible)
- High-volume sample from the precipitator inlet (even better than from individual hoppers because outlet alkali affects resistivity
Approximately 1 cup of dust is needed from whichever field the sample is taken. The standard turnaournd time for Neundorfer resistivity testing and reporting is 10 working days from receipt of the dust samples. Emergency or expedited service is available. Please refer to the rate sheet download to the right for more information.