Field measurements on the generation and emission characteristics of PM2.5 generated by utility pulverized coal boiler

Du, Qian; Dong, Heming; Lv, Donghui; L, Su; Gao, Jianmin; Zhao, Zhifeng; Wang, Min

doi:10.1016/j.joei.2017.07.007

Cited by 4 publications

(5 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Table 5 shows the number/mass concentration of fine particles and the ratio of the concentration of different particle size ranges. Fine particle number concentrations of the CFB boiler before dust removal were millions per cubic centimeter, much lower than in earlier PCB testing (millions to more than ten million/cm 3 ); however, the mass concentrations are about 2 g/m 3 , much larger than PCB (hundreds mg/m 3 ) [17]. The number concentration of boiler 3 was much higher than the other two, but mass concentrations of the three boilers were same.…”

Section: Concentration and Size Distributions Of Fine Particlementioning

confidence: 58%

“…The number/mass concentration distribution of CFB boiler fine particles before and after dust removal is shown in Figure 3. The number size distribution was unimodal distribution that was significantly different with bimodal distribution of PCBs [17]. Before dust removal, the peak of boiler 1 and boiler 2 was at 0.76 µm, which was similar to central modal among three modal distributions [8].…”

Section: Concentration and Size Distributions Of Fine Particlementioning

confidence: 79%

See 1 more Smart Citation

Generation and Emission Characteristics of Fine Particles Generated by Power Plant Circulating Fluidized Bed Boiler

Dong

Gao

et al. 2022

Energies

Self Cite

View full text Add to dashboard Cite

The generation and emission characteristics of fine particulates (PM2.5) from three 300 MW power plant circulating fluidized bed boilers were investigated. One boiler had an external bed and used an electrostatic precipitator, the other two used an electrostatic filter precipitator and fabric filter, respectively. The particle size distribution of fine particles was performed by an electrical low-pressure impactor. PM2.5 samplers were used at the same time to collect fine particles for subsequent laboratory analysis. The results show that the number size distributions of fine particles presented one single peak, but there was no peak in mass size distributions. The mass concentrations of three CFB boilers were similar, but the number concentration of the external bed CFB boiler was much higher than that of the general CFB boiler. The minimum removal efficiencies of the precipitator appeared between 0.1~1 μm, but the locations of the minimum point were different. The morphology of fine particles was mostly irregular. The highest content of fine particles was insoluble oxides and the content of S element was also high. Different precipitators have different removal effects on Si, Al, Ca, S and Fe in fine particles, but they all have poor removal effects on Na and K as well as OC and EC.

show abstract

Section: Concentration and Size Distributions Of Fine Particlementioning

confidence: 58%

Section: Concentration and Size Distributions Of Fine Particlementioning

confidence: 79%

Generation and Emission Characteristics of Fine Particles Generated by Power Plant Circulating Fluidized Bed Boiler

Dong

Gao

et al. 2022

Energies

Self Cite

View full text Add to dashboard Cite

show abstract

“…The Na content in Table varied widely and had no correlation with the Na content in coal or aerosol. During coal pyrolysis, Na can form ultrafine particles suspended in aerosol through a gasification–coagulation mechanism. , If such particles were in the XPS region of interest (ROI), the Na content measured by XPS would rise sharply. The distribution of these particles may be nonuniform and this skewed the XPS results from the ROI of the surface.…”

Section: Resultsmentioning

confidence: 99%

“…Alkali metals represented by Na in coal are easily gasified ,, and have strong catalytic activity during coal pyrolysis. − Three forms of Na include: organic bound Na, soluble Na salt, and Na in clay minerals. The third type of Na (complexed with aluminosilicate) is chemically stable and is not easily removed from coal and generally not studied.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Impact of Sodium on the Formation Mechanism and Physicochemical Properties of Coal-Derived Soot

Dong

Feng

et al. 2020

Energy Fuels

Self Cite

View full text Add to dashboard Cite

Ion-exchanged Na (INa) and adsorbed Na (ANa) concentrations have significant impact on the physicochemical properties of coal-derived aerosol, and product yields of soot and tar. INa effectively reduced tar release during primary pyrolysis, thus reducing soot yield. ANa had no clear effect on primary pyrolysis, but was easier to gasify. During the secondary pyrolysis, lowconcentrated gasified Na promoted aggregation of aromatics to form soot disordered core and increased soot yield. However, at sufficiently high concentration, Na mainly catalyzed tar cracking. Gasified Na can change size distribution of soot aggregates and promote the conversion of SO 2 to SO 4 2− . These two effects of Na were affected by Cl in pyrolysis gas. Na in soot can change the arrangement of graphite-like layers and increase sp 3 hybridized carbon bonding. INa can couple to carboxylate (COO − ) and promote formation of ether C−O structures in soot or tar.

show abstract

Analysis and discussion on formation and control of dioxins generated from municipal solid waste incineration process

2022

Journal of the Air & Waste Management Association

View full text Add to dashboard Cite

Field measurements on the generation and emission characteristics of PM2.5 generated by utility pulverized coal boiler

Cited by 4 publications

References 19 publications

Generation and Emission Characteristics of Fine Particles Generated by Power Plant Circulating Fluidized Bed Boiler

Generation and Emission Characteristics of Fine Particles Generated by Power Plant Circulating Fluidized Bed Boiler

Impact of Sodium on the Formation Mechanism and Physicochemical Properties of Coal-Derived Soot

Analysis and discussion on formation and control of dioxins generated from municipal solid waste incineration process

Contact Info

Product

Resources

About