Evaluation of a flue gas cleaning system of a circulating fluidized bed incineration power plant by the analysis of pollutant emissions

Su, Xiaowen; Zhang, Lin; Xiao, Yuxin; Sun, Mingming; Gao, Xue; Su, Jixin

doi:10.1016/j.powtec.2015.07.038

Cited by 44 publications

(19 citation statements)

References 37 publications

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“…Even though the safe disposal rate (encompassing landfill, composting, and incineration) of MSW has been mounting in China, the generation of MSW is still rising, reaching 172.39Mt (2013) (Figure 1) (National Bureau of Statistics of China, 2015). This figure will further augment to 210Mt in 2015 and 480Mt in 2030 (Fu et al, 2015;Su et al, 2015).…”

Section: Msw Generation In Chinamentioning

confidence: 93%

Municipal solid waste incineration in China and the issue of acidification: A review

Yang

et al. 2016

Waste Manag Res

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In China, incineration is essential for reducing the volume of municipal solid waste arising in its numerous megacities. The evolution of incinerator capacity has been huge, yet it creates strong opposition from a small, but vocal part of the population. The characteristics of Chinese municipal solid waste are analysed and data presented on its calorific value and composition. These are not so favourable for incineration, since the sustained use of auxiliary fuel is necessary for ensuring adequate combustion temperatures. Also, the emission standard for acid gases is more lenient in China than in the European Union, so special attention should be paid to the issue of acidification arising from flue gas. Next, the techniques used in flue gas cleaning in China are reviewed and the acidification potential by cleaned flue gas is estimated. Still, acidification induced by municipal solid waste incinerators remains marginal compared with the effects of coal-fired power plants.

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Section: Msw Generation In Chinamentioning

confidence: 93%

Municipal solid waste incineration in China and the issue of acidification: A review

Yang

et al. 2016

Waste Manag Res

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“…The surface moisture of fly ash enhances the sorption of acid gases to promote the neutralization reaction. Therefore, fly ash mixed with the neutralizer residue and the content of calcium increased to 45.81% (Su et al 2015). According to X-ray diffraction (XRD) analysis, the investigated fly ash sample had a highly complex mineralogy.…”

Section: Characterization Of the Materialsmentioning

confidence: 98%

Use of cement-chelated, solidified, municipal solid waste incinerator (MSWI) fly ash for pavement material: mechanical and environmental evaluations

et al. 2017

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As a by-product from the incineration of municipal solid waste (MSW), fly ash usually contains mobile heavy metals that may engender severe pollution when reused. In this study, fly ash was solidified with cement and a chelating agent to immobilize these polluting elements. The possibility of using the solidified fly ash for pavement materials was also assessed through mechanical and environmental perspectives. According to the results, the strength of solidified fly ash was found proportional to both the cement/fly ash ratio and curing time. This indicated that the increase of fly ash loading reduced the concentration of products from cement hydration, and thus destroyed the structure of the products of hydration. With the increase of freeze–thaw cycles, the compressive strength of cement-stabilized fly ash decreased between days 7 and 14, and then increased between days 14 and 28. Subsequently, the finite element analysis showed that placing the solidified fly ash layer as a pavement material between an unbound base course and subgrade was beneficial to prolong fatigue life and reduce rutting distress of asphalt pavements. Finally, leachability of metals from the mixtures was tested, which showed that leaching concentration decreased as the cement/ash ratio, curing time, and chelating agent content increased.

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“…However, the particles and flue gas rates should be adjusted to ensure steady operational conditions, and this is challenging for the combustion of low calorific value MSW. In the CFB reactor, the fine particulates' removal efficiency is up to 99.5% of particles [6,12,24].…”

Section: Air Pollution Control Emissionsmentioning

confidence: 99%

Energy recovery in China from solid wastes by the moving grate and circulating fluidized bed technologies

Bourtsalas

Huang

Zhang

et al. 2020

Waste Dispos. Sustain. Energy

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In recent years, the Chinese waste-to-energy (WTE) industry is growing at the rate of about thirty new plants each year. The municipal solid waste (MSW) fuel has a low heating value of 4-7 MJ/kg, in comparison to about 11 MJ/kg in U.S. and 8-11 MJ/kg in EU. Combustion of the low heating value fuel on a moving grate (MG), the dominant combustion technology worldwide, is difficult to control and measures have to be taken to remove some moisture prior to combustion. For this and other reasons, an alternative technology, the circulating fluid bed (CFB) has been implemented in China. This paper is a comparative study of the two technologies and was carried out by Columbia University and two senior engineers, representing the MG and CFB technologies of China. Data were derived from industrial operating plants and from the literature. The fuel to MG furnaces is as-received MSW, while the MSW to CFB reactors is pre-shredded using high-torque low-speed shredders. The availability of MG plants, over a 1-year period, is 90% + , while that of CFB facilities is 80% +. Also, the in-plant electricity consumption of MG plants is slightly lower than the consumption of CFB plants. The MG furnace is less compact, than that of a CFB combustion chamber, with a heat flux range from 0.5 to 0.6 MW/m 2 of grate surface area, while that of CFB furnace was about 1.7 MW/m 2 of furnace cross-section. The bottom ash in a MG process is typically wetdischarged and the recovery of metals is less efficient. A drawback of the CFB process is that the fly ash generated is 5-10% of the weight of MSW combusted, as compared to 1-3% for moving grate plants in China.

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Evaluation of a flue gas cleaning system of a circulating fluidized bed incineration power plant by the analysis of pollutant emissions

Cited by 44 publications

References 37 publications

Municipal solid waste incineration in China and the issue of acidification: A review

Municipal solid waste incineration in China and the issue of acidification: A review

Use of cement-chelated, solidified, municipal solid waste incinerator (MSWI) fly ash for pavement material: mechanical and environmental evaluations

Energy recovery in China from solid wastes by the moving grate and circulating fluidized bed technologies

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