Emission of mercury from six low calorific value coal-fired power plants

Gao, Libing; Wang, Yiping; Huang, Qunwu; Guo, Shaojun

doi:10.1016/j.fuel.2017.09.001

Cited by 13 publications

(7 citation statements)

References 38 publications

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“…The content of numerous elements in the emitted material is similar to those noted in fly ash collected in flue gas cleaning systems in numerous European coal-fired power plants, except for Cr, Cu, Hg, Mo, Ni, and Zn, where the content is higher [28]. The content of Hg is within the range commonly reported for other power plants [29]. The measured contents of Cd, Co, Cr, Mn, Ni, Pb, Sb, and Se in the emitted PM correspond to the values presented by Komosiński et al [30] for emitted material from Polish power plants.…”

Section: Chemical Composition Of Emitted Pmsupporting

confidence: 76%

Characteristics of Particulate Matter Emitted from a Coal-Fired Power Plant

Wilczyńska-Michalik¹,

Dańko²,

Michalík³

2020

Pol. J. Environ. Stud.

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Particulate matter (PM) emitted into the atmosphere from a hard coal-fired power plant equipped with a pulverised fuel boiler was studied using X-ray diffractometry (XRD), inductively coupled plasma mass spectrometry (ICP-MS), and scanning electron microscopy fitted with X-ray energy-dispersive spectrometry (SEM-EDS). The PM emitted from coal-fired power plants is rarely studied, in contrast to fly ash collected during flue gas cleaning. The material of PM is composed of particles differing in size, morphology, and chemical composition. Aluminosilicate spherical particles dominate, but other particles also occur (irregular aluminosilicate particles, char particles, irregular particles of quartz, Fe oxides, particles rich in Fe, Cr and Ni, barite, and others). The size of other particles varies from 50 µm to 250 µm. The emitted PM is strongly enriched in several elements in comparison to average coal ash or upper continental crust (e.g., Ag, Bi, Cd, Cr, Hg, Mo, Ni, Re, Se, and Zn). The content of bioavailable, water-soluble fraction (containing S, Ca, K, Na, Cl and subordinate Zn and Ni) is ca 5%. The broad variation of the size and composition of the emitted PM indicates the potential environmental impact and possibility of dispersion over a large area.

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Section: Chemical Composition Of Emitted Pmsupporting

confidence: 76%

Characteristics of Particulate Matter Emitted from a Coal-Fired Power Plant

Wilczyńska-Michalik¹,

Dańko²,

Michalík³

2020

Pol. J. Environ. Stud.

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“…The synergistic removal efficiency of mercury by the APCDs installed in the studied power plants was 66.69–97.56%, and the mercury removal efficiency of which equipped with SCR + ESP/FF + WFGD reached 97.56% . According to previous on-site measurements in Chinese coal-fired power plants, the proportion of mercury in bottom slag, fly ash, WFGD gypsum, and flue gas discharged from stack was in the ranges of 0.15–1.76, 58.83–88.00, 0.07–11.97, and 10.32–40.86%, respectively. , …”

Section: Introductionmentioning

confidence: 74%

“…30 According to previous on-site measurements in Chinese coal-fired power plants, the proportion of mercury in bottom slag, fly ash, WFGD gypsum, and flue gas discharged from stack was in the ranges of 0.15−1.76, 58.83−88.00, 0.07− 11.97, and 10.32−40.86%, respectively. 31,32 China has decreased its emission requirements for PM, SO 2 , and NO x from 30, 100, and 100 to 10, 35, and 50 mg/m 3 , respectively. These new standards are called ultralow-emission (ULE) standards and have been widely implemented.…”

Section: Introductionmentioning

confidence: 99%

Effects of Ultralow-Emission Retrofitting on Mercury Emission from a Coal-Fired Power Plant

Liu

Jia

et al. 2020

Energy Fuels

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To reveal the effects of ultralow-emission (ULE) retrofitting on mercury emission from coal-fired power plants, the migration and transformation of mercury in the same coal-fired unit before and after ULE retrofitting were investigated. The mercury species in flue gas including oxidized mercury (Hg2+), elemental mercury (Hg0), and particulate mercury (HgP) was on-site tested by the Ontario Hydro Method, and that in solid and liquid samples was determined in the lab. The effect of upgrading air pollution control devices (APCDs) on the migration and transformation of mercury was analyzed. Finally, the emission factor of mercury after the whole set of equipment was calculated before and after the ULE retrofitting. According to the test results, the synergistic removal effect of each APCD on mercury was enhanced after ULE retrofitting. An increased amount of mercury is trapped by fly ash and wet flue gas desulfurization gypsum, which is about four times of that in coal, and the mercury concentration in flue gas released into the atmosphere reduced from 3.10 to 0.85 mg/Nm3. In addition, the conventional pollutants, including nitrogen oxide (NO x ), sulfur dioxide (SO2), and particulate matter emission, decreased by 55.1, 62.7, and 78.1%, respectively.

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“…The calorific value is measured through discrete increments of energy pulses which cumulatively result into an overall gross calorific value (GCV, Mcal/ kg) therefore the (CV) integrates all the thermodynamic reactions occurring during the coal sample reduction-oxidation reactions (see Table 1) [44], [45], [46]. The proximate analysis information of coal samples are imperative features which associates the coal mass composition, potential energy dissipation during combustion and the grindability principals surrounding hardness or fracture toughness, the young's modulus etc., of the coal type to the specific applications especially for industries like power station(s) and construction, steel manufactures (see Figure 5) [34], [47], [48], [49].…”

Section: Discussionmentioning

confidence: 99%

Coal Sampe Preparation Strategy using the TENCAN GQM series Ball Milling device.

Gaesenngwe,

RAGHUPATRUNI,

MAMVURA

et al. 2024

Preprint

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The application of Semi Autogenous Grinding strategy in mineral beneficiation engineering is well defined and established unit operation that is qualified for liberation of valuable final products from various rock ores of various kinds. The TENCAN GQM series Ball Mill equipment was deployed throughout our investigation to learn on optimum setting factors that are crucial in achieving effective product quality outcome during coal beneficiation. Therefore, a Semi-autogenous grinding methodology was deployed for grinding five (5) different coal samples into a product stream ranging in particle size from below [−600μm, +38μm] through an optimized procedure that syndicate three(3) control parameters being the {A − powder filling (fc), B − ball loading (JB) and C − residence time or grinding duration (t)}. Moreover, to analyse the grinding kinetics during interaction to produce coal mass recovery at desirable particle size specification relevant for specific manufacturing industry. However, initially the coal sample material was acquired and characterized via three spectroscopy techniques {x – ray diffraction (XRD), x – ray fluorescence (XRF), scanning electron microscopy (SEM)}, to establish contrast of each sample material in composition, morphology, hardness, and the relative abundance of occurring species entrenched within the coal structure (inorganic matter). Hence using the Proximate testing, Ultimate testing, and petrography analysis the examination was possible for each sample type collected. The coal samples that were initially collected were assorted in particle sizes classification and were grouped as run-of-mine coals (−200mm), Cobbles (−75mm, +40mm), Nuts (−40mm, +25mm), Peas (−32mm, +14mm) and fines (−14mm) according to our laboratory sieve specifications. However, the acquired coal species were initially subjugated to a hardness testing using the Hardgrove grindability Index device that reported a variable coal grindability index value with material hardness increased from Nuts (60.37), Cobbles (64.58), ROM (66.84), Fines (66.99) to Peas (67.37) which are relatively soft compared to other coal samples. Process engineers, researchers and students in different organizations studying metallurgy and coal beneficiation etc., must be informed about factors affecting coal material preparation innovations and the health-safety risk encounter by the mineral engineer personal during handling and processing. Moreover, production efficacy is significantly improved through adopting optimized model functions that accurately increase the product recovery at lower power rating for the cumulative production path hence relevantly reducing the cost(s) of exacerbated by tedious and unnecessary methods.

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Emission of mercury from six low calorific value coal-fired power plants

Cited by 13 publications

References 38 publications

Characteristics of Particulate Matter Emitted from a Coal-Fired Power Plant

Characteristics of Particulate Matter Emitted from a Coal-Fired Power Plant

Effects of Ultralow-Emission Retrofitting on Mercury Emission from a Coal-Fired Power Plant

Coal Sampe Preparation Strategy using the TENCAN GQM series Ball Milling device.

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