A cleaner biomass energy production by optimization of the operational range of a fabric filter

Brandelet, Benoît; Pascual, Christophe; Debal, Matthieu; Rogaume, Yann

doi:10.1016/j.jclepro.2019.119906

Cited by 5 publications

(2 citation statements)

References 39 publications

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“…Currently in research are filter solutions which incorporate SCR catalysts to reduce NOx emissions, but like the previous solution require electrical preheating to avoid condensation [33]. Brandelet et al attempted to optimise the temperature window in which a fabric filter can be operated at a biomass boiler and showed that the current temperature limits are too high, but the issue remains [34].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of a metal mesh filter prototype with wet regeneration

Baumgarten

Grammer

Ehard³

et al. 2021

Biomass Conv. Bioref.

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Wood combustion is a major part of the current efforts to reduce CO2 emissions. However, wood combustion leads to emissions of other pollutants like fine particulate matter. A new option to reduce particulate matter emissions is a metal mesh filter with counter current flushing. An automatic prototype was tested under realistic conditions including starts and stops of the boiler. For regeneration, the filter was flushed using water in opposite flow direction. The water was recycled multiple times to limit water consumption. The results are very promising. Regeneration was successful and no signs of decay could be observed over 419.5 h of operation and 234 regenerations. The filter can be operated during all phases of boiler operation, which is a major step forward compared to alternative secondary measures. Separation efficiency was high with 80–86%, even though the filter showed internal leakage, which reduced the separation efficiency. Additionally, waste products were examined. About 1000 l wastewater can be expected to be produced every month, which could be disposed using the communal waste water system, given the low heavy metal loading. A part of the fine particulate matter is unsoluble and has to be removed from the regeneration water before reuse. The unsoluble fraction contains the majority of heavy metals and has to be disposed as fly ash or used for urban mining. Generally spoken, the metal mesh filter is a new, promising option which can overcome limitations of current secondary measures without increasing costs given its simple and robust construction.

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Section: Introductionmentioning

confidence: 99%

Evaluation of a metal mesh filter prototype with wet regeneration

Baumgarten

Grammer

Ehard³

et al. 2021

Biomass Conv. Bioref.

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“…The most studied after-treatment technologies for small-scale biomass combustion are ESPs [9][10][11], cyclones [12], scrubbers and condensing heat exchangers [13][14][15][16], fabric filters [17], and catalytic combustors [18,19]. Each of these technologies has their own benefits and problems regarding cost, ease of use, efficiency, and maintenance efforts.…”

Section: Introductionmentioning

confidence: 99%

High Temperature Electrical Charger to Reduce Particulate Emissions from Small Biomass-Fired Boilers

et al. 2020

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New particulate matter (PM) filtering technologies are needed to meet the emission regulations for small combustion appliances. In this work, we investigate the performance of a novel electrical particle filtration system, the single needle shielded corona charger (SCC), which offers an advantageous solution for PM control in boilers by enhancing particulate deposition within existing boiler sections. Experiments under different operating conditions of a wood-fired boiler were performed, wherein the SCC was installed upstream of either a condensing heat exchanger (CHX) or a cyclone. PM reduction was found to be strongly affected by the SCC temperature and the following collection surface area, and reached its highest reduction efficiency of >90% at the temperature range of 400–500 °C when operating in combination with a CHX. The SCC–cyclone combination was less efficient, providing a 27% PM reduction, as a result of the low surface area and residence time in the cyclone. These results indicate that the SCC can feasibly provide particle filtration when combined with a CHX, wet scrubber, or a cyclone to meet the new emission regulation requirements. The system is best suited for small-scale boilers but can be scaled up to larger boilers by increasing the number of corona chargers.

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