Performance analysis of different scrubber systems for removal of particulate emissions from a small size biomass boiler

Bianchini, Augusto; Cento, Francesco; Golfera, Luca; Pellegrini, Marco; Saccani, Cesare

doi:10.1016/j.biombioe.2016.06.005

Cited by 43 publications

(23 citation statements)

References 30 publications

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“…Particles with diameter between 0.1 µm and 1 µm may be collected through the interception mechanism if the particle passes within one particle radius from the droplet surface. Finally, inertial impaction is the predominant removal mechanism for particles larger than 5 µm (Bianchini et al, 2016). In this theory, each absorption mechanism is function of the bubble rising velocity, and therefore the bubble size, the gas flow rate and the height of the column.…”

Section: Particle Collection Efficiency Of the Water Columnmentioning

confidence: 99%

Aerosol Characterization and Particle Scrubbing Efficiency of Underwater Operations during Laser Cutting of Steel Components for Dismantling of Nuclear Facilities

Peillon

Fauvel

Chagnot

et al. 2017

Aerosol Air Qual. Res.

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The goal of this article is to provide results on aerosol particles emissions of a laser Nd:YAG cutting technique used for the decommissioning of nuclear facilities. In particular, the study aims at characterizing the aerosol emitted during the cutting of steel specimens of different thicknesses and to study particulate emissions for cuts in air and under water. To do so, we calculate the emitted aerosol mass per unit area of cut. Overall, it was found that the mass of aerosol per unit area of cut by laser cutting decreases when the laser power and cutting speed increase. We also examine the performance of the height of the water column above the cut on the particle collection efficiency. We found that the driving phenomenon for particle collection is the scrubbing of particles by bubbles present in the water column. When cuts are realized under water, the production of aerosol particles mass per unit area of cut is reduced by a factor of 10 and limited below 70 g m -2 .

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Section: Particle Collection Efficiency Of the Water Columnmentioning

confidence: 99%

Aerosol Characterization and Particle Scrubbing Efficiency of Underwater Operations during Laser Cutting of Steel Components for Dismantling of Nuclear Facilities

Peillon

Fauvel

Chagnot

et al. 2017

Aerosol Air Qual. Res.

View full text Add to dashboard Cite

show abstract

“…The environmental impact resulting from the conversion of solid biomass into energy in the combustion process in small-scale installations causes particulate matter (PM) emissions, which becomes a critical aspect if compared to the considerably lower PM emissions from methane boilers [15].…”

Section: Particulate Emissions From Biomass Combustion In Small Size mentioning

confidence: 99%

“…However, while the organic part of the PM causes problems, the inorganic ones are also problematic due to the possible presence of potassium, sulphur, sodium and zinc, which could lead to increased emissions. The greatest amount of PM emissions from biomass combustion consists in particles with an aerodynamic diameter smaller than 2.5 [15].…”

Section: Particulate Emissions From Biomass Combustion In Small Size mentioning

confidence: 99%

Homogenous and heterogeneous combustion in the secondary chamber of a straw-fired batch boiler

et al. 2017

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Abstract. Currently, the attention of the producers of biomass batch boilers is mostly focused on the problem of the total efficiency of energy conversion, CO emissions as well as particulate matter emissions. Due to the regulations of the European Union, the emissions referred to above have to be kept at certain levels because of health considerations, but also because of the necessity to increase the efficiency of the devices. The paper presents the process of analysis of a straw-fired small-scale boiler. In this study, the early stage CFD model presented in a previous paper [1] has been improved and evaluated. Based on [2], an additional set of specimens participating in homogeneous gas reactions was assumed to describe the combustion process sufficiently. Associated Arrhenius parameters have been applied for the description of these reactions. ANSYS Fluent 16 has been used to perform the analysis and the analysis was focused on the CO emissions level as well as on the impact of the modelling approach on the result of the computing. Moreover, losses related to incomplete combustion have been calculated for each of the considered cases.

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“…For the WFGD system, promoting gas‐liquid mass transfer helps to increase desulphurization efficiency and control system resistance . In addition, in our previous research and research conducted by many others, it has been shown that PM can be removed synthetically in the scrubbing tower by droplets or liquid film …”

Section: Introductionmentioning

confidence: 99%

“…Thus, the capture ability is weak for fine particles or droplet and flue gas low relative velocity . Generally, the dispersive flow in an open spraying scrubber has poor particles removal compared with other flow patterns . Consequently, a significant amount of work has been done to change the local flow pattern in the scrubber of the WFGD system.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on flue gas purification and gas‐liquid multiphase flow in a spraying column with perforated plate

et al. 2020

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The synergetic removal of sulphur dioxide and particulate matters (PM) in flue gas was investigated in a spraying column equipped with flow pattern controlling (FPC) internals. The performance of the novel column was compared with that of the traditional open column by monitoring the removal efficiency and system pressure drop. To understand the gas-liquid multiphase flow field and mass transfer process inside the column with different structures, image processing based on the Otsu method and particle image velocimetry (PIV) technology were used. It was found that the FPC column with a section size of 200 mm × 200 mm, hole diameter of 4 mm, and aperture ratio of 0.65 demonstrated the best performance. As clearly observed from the flow filed, bubble flow was formed in FPC column, while the dispersive and falling-film flow was developed in the open column. The liquid holdup in FPC unit was much more than in the open spraying column, which enhanced the mass transfer process. According to the PIV results, the reverse flow of the liquid, caused by the gas jet ascribed to the perforated plate and the confined space in the FPC unit, was the primary reason for bubble generation and the gas-liquid flow pattern in the column. K E Y W O R D S desulphurization, flue gas, gas-liquid multiphase flow, particulate matter

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Performance analysis of different scrubber systems for removal of particulate emissions from a small size biomass boiler

Cited by 43 publications

References 30 publications

Aerosol Characterization and Particle Scrubbing Efficiency of Underwater Operations during Laser Cutting of Steel Components for Dismantling of Nuclear Facilities

Aerosol Characterization and Particle Scrubbing Efficiency of Underwater Operations during Laser Cutting of Steel Components for Dismantling of Nuclear Facilities

Homogenous and heterogeneous combustion in the secondary chamber of a straw-fired batch boiler

Experimental investigation on flue gas purification and gas‐liquid multiphase flow in a spraying column with perforated plate

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