Electrostatic precipitators (ESP)

Our ESPs secure trouble-free operation in collecting the dust/chemicals recirculated in the kraft pulping process, while minimizing dust emissions. We select the best combination of rated current (mA), voltage (kV) and high-voltage transformer type (single phase or three phase) to ensure the most optimal operating conditions. Our designs are process type dependent and tailored to the different requirements of recovery boilers, lime reburning kilns, circulating fluid bed, bubbling fluid bed and grate-type boilers.

Designed for operating temperatures from 50˚C to 400˚C and suction from +50 to -3000 mmWG for sinter strands, our ESPs for iron and steel can be adjusted to manage both abrasive and sticky dust. We select the best combination of high-voltage transformer type – either traditional DC or Coromax® Pulse – depending on the dust emission type, process behaviour and operating conditions, to achieve optimum dust collection and energy efficiency. We also design ESPs for pelletizers, typically operating between 80-300°C, for maximum dust removal and availability.

Extensive process knowledge of dust behaviour associated with kilns and raw mills, including how to return the collected dust to the process, has resulted in an effective and highly compact ESP design. Our ESPs are ideal to use with clinker coolers with or without waste heat recovery in the circuit for a temperature range of 90-400°C and can be optimized for the use of alternative fuels. For applications after the raw mill or cement mill, our ESP includes a pre-separator hopper to separate coarser dust and to maximize the overall efficiency.

Our ESP solutions are designed to be used within a variety of metallurgical applications, including: Copper converter Copper roaster Copper dryer Ferro/Nickel kiln Ferro/Nickel dryer Zinc roaster Molybdenum roaster The design accommodates changing in temperatures and gas flow characteristics, it includes an effective purge-air system protecting the insulators by keeping them dust-free and preventing acidic and moisture condensation. Our rapping system for collecting plates, high voltage electrodes, and gas distribution screens is designed to remove the sticky dust. Robust drag chains on the hoppers remove and transport the dust - even for such challenging processes.