4,856km2 and occupies about 41.3% of the total area (National Bureau of Statistics of China, 2006). Almost all of this area is dry agricultural land. About 38% of the total cultivated area is salt ...
— Like natural gypsum, the application of flue gas desulfurization gypsum (FGDG) with irrigation provides economic and environmental value (Wang and Yang, 2018; Watts and Dick, 2014). FGDG is of low cost, because it is a side product of sulfur removal from fuel combustion in coal-fired power plants and does not require mining and …
— 1. Introduction. A massive amount of flue gas desulfurization (FGD) gypsum is generated from coal-fired power plants annually. Most FGD gypsum has still dumped in landfills for storage, which would not only involve serious water and air pollution problems and occupational health risks, but also waste large land and gypsum resources.
In this paper, waste gypsum from wet flue gas desulfurization (WFGD) mixed with NH3·H2O was applied for CO2 absorption in the solid-liquid-gas phase system. The effects of …
This paper presents a comprehensive review of the state of the art in flue gas desulfurization (FGD) technologies for coal-fired boilers. Data on worldwide FGD applications reveal that wet FGD technologies, and specifically wet limestone FGD, have been predominantly selected over other FGD technologies. However, lime spray drying …
— Flue gas desulfurization gypsum (FGDG) and fly ash (FA) are by-products from coal-fired power plants that urgently need to be recycled in a sustainable way. This study aims to develop a green binder using FGDG incorporating cement and large-volume FA that can substitute some cement in structural and geotechnical engineering …
— The synthesis of α-calcium sulfate hemihydrate (α-CSH) from flue gas desulfurization (FGD) gypsum is a good way to realize the comprehensive utilization of FGD gypsum. To obtain α-CSH with the satisfactory performances, a facile hydrothermal-aging pretreatment process for FGD gypsum raw materials was proposed, where FGD …
Max. Capacity. 1,050 MW. Max. Inlet SO 2 Concentration. 80,000 mg/Nm 3 (Coal fired). Max. SO 2 Removal Efficiency. 99%. High Reliability. The flue gas desulfurization (FGD) plant removes sulfur dioxides (SO 2) from flue gas produced by boilers, furnaces, and other sources.Mitsubishi Power effectively contributes to the prevention of air pollution through …
The flue gas desulfurization (FGD) belt is specially designed for horizontal vacuum belt filters, used to filter the gypsum produced in the wet desulfurization process of flue gas in coal-fired power plants. The vacuum filter belt made of PFM Screen polyester fiber is used in the horizontal vacuum belt filter to dehydrate the gypsum accumulated in the flue gas …
— Flue gas desulfurization gypsum (FGDG), a solid waste material generated by power plants, offers a cost-effective solution for preparing backfill materials. Con
— Flue gas desulfurized gypsum mainly comes from thermal power plants, smelters, and large-enterprise boilers, and contains industrial by-products produced through a wet desulfurization combustion process, where SO 2 gas and lime slurry react under strong oxidation conditions. The main component of this gypsum is calcium sulfate …
— In this study we reviewed the Flue Gas Desulfurization processes and the different options to improve its efficiency as Non-regenerable Wet and Dry methods, the …
Flue gas desulfurization gypsum (FGDG), a solid waste produced during sulfur removal in coal-fired power plants, has applications in saline-alkali soil amelioration due to its function of calcium‑sodium ion exchange. Existing research has focused on the use of gypsum to improve saline-alkali soils i …
— Reclamation of saline–sodic soils with gypsum from the desulphurization of flue gas (FGD) is a recently developed technique. However, limited information is …
— In this paper, waste gypsum from wet flue gas desulfurization (WFGD) mixed with NH3·H2O was applied for CO2 absorption in the solid-liquid-gas phase system. The effects of operation temperature, CO2 flow rates, and ammonia-to-gypsum ratio on carbonation process were discussed. Meanwhile, a model for CO2 absorption in the …
Flue gas desulfurization (FGD) gypsum is mainly generated from wet scrubbing processes, using limestone as a source of calcium ions, for removing sulfur dioxide from the fluegas in
— A recent study has revealed that flue gas desulfurization (FGD) gypsum and lignite humic acid application enhanced the salt leaching and crop production. ... at coastal area of North Jiangsu Province, China. The soil is sandy clay loam texture with pH of 8.43 and clay content of 185 g kg−1. Six treatments included three FGD gypsum rates (0, 1 ...
— Flue gas desulfurization gypsum (FGDG) and fly ash (FA) are by-products from coal-fired power plants. This study focuses on using them as the basic components …
Disaster Reduction and Emergency Management, Beijing Normal University, Beijing, China; cFaculty of Geographical Science, Beijing Normal University, Beijing, China ABSTRACT The reclamation potential of applying combined brackish ice and flue-gas desulfurization (FGD) gypsum to a coastal saline soil was evaluated in a raised bed agroecosystem.
— [19] Qi C. B. 2010 Comparison between Magnesium Oxide and Limestone-Gypsum Wet Flue Gas Desulfurization Technology Silicon Valley 9 056. Google Scholar [20] Zhao X., Gao J., Wu S. H. and Qin Y. K. 2003 Development of Dry and Semi-Dry (Calcium Base) Flue Gas Desulfurization Technology Chemical Engineering 31 64-67. …
Flue gas desulfurization gypsum (FGDG) is an industrial by-product generated during the flue gas desulfurization process in coal-fired power plants. The process involves the wet scrubbing process that injects a lime or limestone reagent into the flue gas path to capture SO2 as CaSO 3, which is then converted to CaSO 4 through forced air oxidation.
— [20] Stout WL and Priddy WE 2008 Use of flue gas desulfurization (FGD) by-product gypsum on alfalfa Commun Soil Sci. Plant Anal 27 2419-2432. Google Scholar [21] Tobert HA and Watt DB 2014 Impact of flue gas desulfurization gypsum application on water quality in a coastal plain soil J Environ Qual 43 273-280. Google Scholar
— The effective and safe use of FGD gypsum in agricultural land is still debated in some countries even though its effectiveness in soil management has been reported in many studies. Thus, the changes in the levels of soil salinity, alkalinity, crop yield, and other physicochemical properties in different soil types and crops after …
Impact of flue gas desulfurization gypsum and lignite humic acid application on soil organic matter and physical properties of a saline-sodic farmland soil in Eastern China. Jiangkuan Nan1 & Xiaomin Chen1 & Can Chen2 & Muhammad Siddique Lashari1 & g Deng1 & …
The main application purpose of desulfurization gypsum is to dry it and use it as the retarder of cement, or smelt is as semi-hydrated gypsum for making gypsum board, gypsum block and plastering anhydrite. Desulfurization gypsum dryer or fgd gypsum dryer adopts horizontal air-swept structure.
— The accumulation of a large amount of flue gas desulfurized gypsum (FGDG) not only occupies valuable land resources, but also the harmful substances …
— The use of waste to capture CO 2 has been on the rise, to reduce costs and to improve the environmental footprint. Here, a flue gas desulfurization (FGD) gypsum waste is proposed, which allows us ...
— 3. Flue Gas Desulfurization Technologies. Flue gas desulfurization is an efficient method for the reduction of the sulfur dioxide emissions. Citation 2 Many processes are available in the market, such as (a) wet scrubbers, (b) spray dry scrubbers, (c) sorbent injection, (d) regenerable processes, and (e) combined SO 2 /NO X removal processes. …
Flue gas desulfurization gypsum (FGDG), a solid waste produced during sulfur removal in coal-fired power plants, has applications in saline-alkali soil amelioration due to its …
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— The synthesis of α -calcium sulfate hemihydrate (α -CSH) from flue gas desulfurization (FGD) gypsum is a good way to realize the comprehensive utilization of …
— We hypothesize that flue gas desulfurization (FGD) gypsum can be used as a soil amendment to accelerate the desalination process via calcium ions (Ca 2+) replacing exchangeable sodium (Na +) ions. Field experiments in reclaimed tidal lands in the Yangtze River delta were conducted with FGD gypsum applied at concentrations of 0, 15, 30, 45, …
— An experimental study of flue gas desulfurization in a pilot spray dryer. Environ Prog 1997; 16: 20–28. 10.1002/ep.3300160116 Search in Google Scholar Ollero P, Gutiérrez Ortiz FJ, Cabanillas A, Otero J. Flue-gas desulfurization in circulating fluidized beds: an empirical model from an experimental pilot-plant study.
converted into a gypsum slurry by the desulfurization pro-cess. The latter is then dehydrated to produce FGD gypsum (as shown in the following equations).17 Thus, the synthetic FGD gypsum can be used to replace natural gypsum in sev-eral industries.18,19 SO 2 in flue gas: Dissolution of limestone: An overall chemical reaction of the above ...
W¼ðÞ8:728 ESPþ0:4412 H D=ðÞ100 η : Where: H is the soil depth for reclamation (m), which is 0.2 m, D is the soil bulk density (kg m 3), which is 1450 kg m, and η is the mass ratio of CaSO
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— Surface modification of calcium sulfate whisker prepared from flue gas desulfurization gypsum. Author links open overlay panel Chengjun Liu, Qing Zhao, Yeguang Wang, Peiyang Shi ... The authors gratefully acknowledge supports by the Natural Science Foundation of China (No. 51374059, No. 51304042), and the Fundamental Research …
Control and Treatment of Air Emissions. Shahryar Jafarinejad, in Petroleum Waste Treatment and Pollution Control, 2017. 5.1.5 Flue-Gas Desulfurization. Flue-gas desulfurization (FGD) is a scrubbing technique that uses an alkaline reagent (typically a sodium- or calcium-based alkaline regent) to remove SO 2 from flue gas (Tri-State …
