Abstract
Two years of operation at Kansanshi's sulphuric acid plant
Highlights
Issues arose in the plant which were not evident during the design phase and became evident only after operation for an extended period, predominatly around the converter
This paper provides details on the issues and the solutions implemented
Concentrations resulting from the operation of PSCs
Summary
The flashover rate is an important parameter for increasing the overall filter efficiency. These adjustments improved the WESP performance at high flow rates from ‘very poor’ to ‘good’ (see Figure 12). Increasing the voltage and primary current settings on the WESPs increased the risk of burning the collecting tubes at low flow rates. After the incident a separate parameter set for low flow and startup situations was set for the WESPs, with significantly reduced limits on the primary current and a lower maximum secondary voltage limit. As the WESP voltage was increased to achieve better collection efficiencies the WESP would trip due to a fault in the band heater temperature measurement circuit.
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