A novel electrical charging condensing heat exchanger for efficient particle emission reduction in small wood boilers

Rodriguez, Julija Grigonyte-Lopez; Suhonen, Heikki; Laitinen, Ari; Tissari, Jarkko; Kortelainen, Miika; Tiitta, Petri; Lähde, Anna; Keskinen, Jorma; Jokiniemi, Jorma; Sippula, Olli

doi:10.1016/j.renene.2019.06.052

Cited by 14 publications

(15 citation statements)

References 24 publications

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“…The measurements can be divided into four different campaigns (Table 1): Campaign A includes results from a previous study [23], wherein the old version of SCC in a conventional firetube heat exchanger setup is used, referred to as a reference boiler (REF). Particulate mass reduction in REF is relatively small [15], and in this work the emissions after REF are considered as the reference value, i.e., no particulate reduction efficiency is calculated for REF.…”

Section: Methodsmentioning

confidence: 99%

“…The principles of the SCC have been demonstrated in a previous study [23]. Herein, new designs of the SCC and the SCC chamber were used.…”

Section: Shielded Corona Chargermentioning

confidence: 99%

“…In our previous work, we studied a shielded corona charger (SCC) technology [22] as a low-cost method for the electrical charging of flue gas particles. This technology was tested in a biomass boiler by Grigonytė-Lopez Rodriguez et al [23], by installing it upstream of the heat exchanger. The overall idea of this system is that, unlike in traditional ESPs, no additional collection surface is required.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, this method could be implemented in existing technologies and as retrofit systems in old boilers, thereby decreasing the investment cost. The previous study by Grigonytė-Lopez Rodriguez et al [23] expressed particular interest in a combined SCC and condensing heat exchanger (CHX) system, because it would benefit from a natural cleansing effect by condensing water film on the collection surfaces. Together, the SCC and CHX utilize four physical phenomena to trap particles: electrostatic forces between the particles [24], thermophoretic deposition based on a high thermal gradient, diffusiophoretic deposition via water condensation, and Brownian diffusion [15].…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Methodsmentioning

confidence: 99%

“…The principles of the SCC have been demonstrated in a previous study [23]. Herein, new designs of the SCC and the SCC chamber were used.…”

Section: Shielded Corona Chargermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2020

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“…A large number of fossil fuels are consumed, and excessive dust-containing smoke is emitted into the air, resulting in increasingly serious air pollution, which has become an important problem to be solved in the world [1][2][3]. There are many kinds of atmospheric pollutants, including SO 2 , NO X and atmospheric particulate pollutants, among which particulate pollutants have become the primary pollutants affecting the quality of air environment [4,5].…”

Section: Introduction mentioning

confidence: 99%

Influence of magnetic field and working voltage on the tripping performance in spherical cylindrical ECP

Zhang

Ren

2021

E3S Web Conf.

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In order to further improve the trapping effect of fine particles, a new electrostatic cyclone precipitator (ECP) with magnetic confinement was proposed, the overall efficiencies of fine particles under different operating conditions were numerically simulated, and the influence of working voltage on the dust-removal effect of fine particles with and without magnetic field were discussed. The results show that increasing working voltage or magnetic induction intensity improves the trapping performance of spherical cylindrical magnetically confinement ECP, and the lifting effect gradually weakens while increasing the same amplitude. The results can offer technical reference for the optimization design of greatly improving the ECP dust-removal performance.

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Design of a Condensing Heat Recovery Integrated with an Electrostatic Precipitator for Wood Heaters

Farías,

Cornejo,

Cuevas

et al. 2023

Proceedings of the XV Ibero-American Congress of Mechanical Engineering

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High emission of particulate matter from fixed sources of biomass combustion and the effects on the health of the population have driven the implementation of public policies for changes in the energy matrix and a technological replacement in Chile. Due to this, a prototype of a condensing heat exchanger is developed integrating an electrostatic precipitator, seeking to enhance the positive effects of these technologies in a single and relatively compact device. The state of the art shows similar developments, but with high levels of complexity in construction, as a shell and tube heat exchanger, that is why the concept of a thermocannon was optimized to condense the moisture present in the fumes and reduce smoke emissions through an electric field. It is expected that using an electrostatic precipitator, up to 90% of particulate matter emissions will be captured, and thermal efficiencies of an additional 9%. For its design, heat transfer and thermodynamics models were used and validated through CFD modeling.

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A novel electrical charging condensing heat exchanger for efficient particle emission reduction in small wood boilers

Cited by 14 publications

References 24 publications

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

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

Influence of magnetic field and working voltage on the tripping performance in spherical cylindrical ECP

Design of a Condensing Heat Recovery Integrated with an Electrostatic Precipitator for Wood Heaters

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