Effect of wet flue gas desulfurization (WFGD) on fine particle (PM2.5) emission from coal-fired boilers

Yao, Sen; Cheng, Shuiyuan; Li, Jianbing; Zhang, Hanyu; Jia, Jia; Sun, Xuewei

doi:10.1016/j.jes.2018.05.005

Cited by 56 publications

(27 citation statements)

References 38 publications

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“…Because of their small size, these particles are able to reach the pulmonary alveoli and pass into the bloodstream. This is associated with an increased risk of respiratory and cardiovascular disease, especially when the environmental concentration of these particles exceeds 35.4 µg/m 3 [40][41][42][43].…”

Section: Environmental Benefitsmentioning

confidence: 99%

Sustainable Thermal Energy Generation at Universities by Using Loquat Seeds as Biofuel

et al. 2020

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Global energy consumption has increased the emission of greenhouse gases (GHG), these being the main cause of global warming. Within renewable energies, bioenergy has undergone a great development in recent years. This is due to its carbon neutral balance and the fact that bioenergy can be obtained from a range of biomass resources, including residues from forestry, agricultural or livestock industries, the rapid rotation of forest plantations, the development of energy crops, organic matter from urban solid waste, and other sources of organic waste from agro-food industries. Processing factories that use loquats to make products such as liqueurs and jams generate large amounts of waste mainly in the form of skin and stones or seeds. These wastes are disposed of and sent to landfills without making environmentally sustainable use of them. The University of Almeria Sports Centre is made up of indoor spaces in which different sports can be practiced: sports centre pavilion (central court and two lateral courts), rocodrome, fitness room, cycle inner room, and indoor swimming pool. At present, the indoor swimming pool of the University of Almeria (UAL) has two fuel oil boilers, with a nominal power of 267 kW. The main objective of this study is to propose an energetic analysis to determine, on the one hand, the energetic properties of the loquat seed and, on the other hand, to evaluate its suitability to be used as a solid biofuel to feed the boilers of the heated swimming pool of the University of Almeria (Spain), highlighting the significant energy and environmental savings obtained. Results show that the higher calorific value of loquat seed (17.205 MJ/kg), is like other industrial wastes such as wheat straw, or pistachio shell, which demonstrates the energy potential of this residual biomass. In addition, the change of the fuel oil boiler to a biomass (loquat seed) boiler in the UAL's indoor swimming pool means a reduction of 147,973.8 kg of CO 2 in emissions into the atmosphere and an annual saving of 35,739.5 €, which means a saving of 72.78% with respect to the previous fuel oil installation. A sensitivity analysis shows that fuel cost of base case is the variable with the most sensitivity changing the initial cost and net present value (NPV).

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Section: Environmental Benefitsmentioning

confidence: 99%

Sustainable Thermal Energy Generation at Universities by Using Loquat Seeds as Biofuel

et al. 2020

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“…The wet limestone-gypsum desulfurization (WFGD) method plays an important role in reducing SO x emissions and at the same time reduces the release of another hazardous pollutant, particulate matter, PM2.5, so this side effect leads to additional advantages of the method [55]. WFGD technology is the most widely used SO x emission reduction technique in the world due to its high SO x removal efficiency, low investment, valuable by-product (gypsum), maturity, and reliability [54,55]. As of 2018, approximately 87% of the world's desulfurization plants use WFGD technology, as SO x removal efficiency can reach up to 92-98%.…”

Section: Post-combustion So X Removalmentioning

confidence: 99%

Materials for CO2, SOx, and NOx Emission Reduction

Shelyapina

Rodrı́guez-Iznaga

Petranovskii

2020

Handbook of Nanomaterials and Nanocomposites for Energy and Environmental Applications

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Industrial development and urbanization require effective constant monitoring and effective removal of major air pollutants. Three of them, the fight against which is discussed in this chapter, appear in the process of burning fuel, although their genesis is different. Sulfur oxide is formed as a result of the combustion of impurities either in hydrocarbons, and in this case, the fight against it should begin with a deep cleaning of the fuel, or by burning coal, and then you have to deal with the desulfurization of exhaust gases. Nitrogen oxide pollutants are formed at high temperatures from nitrogen present in the air, and purification, respectively, occurs in the exhaust gases of heat engines. Carbon dioxide is the main product of the combustion of any fuel and, accordingly, requires special methods for its removal. The environmental impact of these gases is also different. SO x and NO x are pollutants that form smog and acid rain. CO 2 is greenhouse gas, and its removal is becoming one of the main goals for climate stabilization. Given these differences, this review of existing materials and processes to eliminate the three main gaseous air pollutants has been made.

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“…With the enhancement of the environmental management requirement, coal-fired power plants in China have already completed the ultra-low emission (ULE) retrofit. Some coalfired industrial boilers have implemented the ULE retrofit by adopting the same APCDs applied in coal-fired power plants to execute the ultra-low emission standards, such as hybrid of selective non-catalytic reduction and selective catalytic reduction (SNCR-SCR) for denitrification, more efficient wet flue gas desulfurization (WFGD) for desulfurization, and wet electrostatic precipitator (WESP) after WFGD systems for removal of PM and secondary PM produced by wet desulfurization (Zhu et al, 2014;Yao et al, 2019). In August 2015, Shandong Province required the in-use coal-fired industrial boilers to be carried out ULE retrofit to meet the ULE limits of 10 mg m -3 , 50 mg m -3 , and 200 mg m -3 for PM, SO 2 and NO x , respectively, under the O 2 content of 9% (SEPD, 2015).…”

Section: Introductionmentioning

confidence: 99%

Emission Characteristics of Hazardous Atmospheric Pollutants from Ultra-low Emission Coal-fired Industrial Boilers in China

Yue

Wang

et al. 2020

Aerosol Air Qual. Res.

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This study comprehensively investigated the emission characteristics of primary air pollutants (PM, SO 2 and NO x ) and trace elements (As, Cd, Cr, Hg and Pb) from twelve coal-fired industrial boilers, nine of which were ultra-low emission (ULE) and three of which were non-ULE, based on field measurements. The concentrations, release ratios and relative enrichment factors (REFs) of the trace elements in both the coal and the bottom ash were obtained. Furthermore, the influence of atmospheric pollutant control devices (APCDs) on the emission concentrations and emission factors (EFs) of these pollutants and elements, as well as on their removal efficiencies, was analyzed. The average release ratios for Hg, Cr, Pb and As from the coal were 96.28%, 59.95%, 65.34% and 84.85%, respectively, whereas the average overall removal efficiencies for PM, SO2, NO x , Hg, Cr, Pb and As with the APCD configurations of the ULE coal-fired industrial boilers were 99.5%, 95.9%, 81.0%, 95.6%, 95.6%, 99.3% and 96.0%, respectively. Using selective non-catalytic reduction (SNCR), and a hybrid of selective non-catalytic reduction and selective catalytic reduction (SNCR-SCR) in the ULE boilers, the EFs of the NO x were 5.5 × 10 -1 kg t -1 and 4.9 × 10 -1 kg t -1 , respectively. Overall, the removal efficiencies for NO x and Hg were 2.1 and 2.8 times higher, respectively, with the ULE than the non-ULE coal-fired industrial boilers, which was mainly attributable to the higher denitrification efficiency, higher dedusting efficiency and higher liquid/gas (L/G) desulfurization ratio of the ULE boilers.

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Effect of wet flue gas desulfurization (WFGD) on fine particle (PM2.5) emission from coal-fired boilers

Cited by 56 publications

References 38 publications

Sustainable Thermal Energy Generation at Universities by Using Loquat Seeds as Biofuel

Sustainable Thermal Energy Generation at Universities by Using Loquat Seeds as Biofuel

Materials for CO2, SOx, and NOx Emission Reduction

Emission Characteristics of Hazardous Atmospheric Pollutants from Ultra-low Emission Coal-fired Industrial Boilers in China

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