On the trade-off between energy efficiency and particle emissions for pulse-jet cleaned filters

  • Chair:

    FILTECH 2023, The Filtration Event

  • Place:

    Cologne, Germany

  • Date:


  • Author:

    P. Bächler, J. Meyer, A. Dittler

  • Pulse-jet cleaned filters are commonly used for the separation of particles from dust-laden gas streams for the purpose of product recovery or environmental protection. While past research focused on e.g. minimizing dust emissions, energy aspects are gaining relevance in the context of rising energy-costs and tackling climate change.

    While the differential pressure between the raw-gas side and the clean-gas side of the filter is one major indication for the energy demand, the required consumption of pressurized air for the jet-pulse also has to be considered in a total energy balance. Filter operation allows for a variety of parameters (e.g. cleaning frequency, tank pressure for filter regeneration, valve opening time, etc.) to be adjusted that have an impact on energy demand and dust emissions. While frequent cleaning of the filters creates a low differential pressure level, the consumption of pressurized air may become considerable. Additionally, particle penetration is predominantly possible only after cake detachment so that emissions presumably increase for shorter cycle times. Höflinger et al. proposed a method for the evaluation of filter media under energy considerations for filter test rigs, taking into account the contribution of differential pressure as well as pressurized air that can be transferred to actual filter operation in order to evaluate filter performance regarding energy aspects.

    In this study, the operation behavior of a pilot-scale baghouse filter with a total of nine filter bags (needle-felt filter medium) was analyzed regarding energy consumption and particle emissions.