The past several years has witnessed great progress in utilization of industrial waste gypsum. Newly developed carbonation technology toward CaCO3 preparation also …
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An industrially feasible process was proposed to produce α-calcium sulfate hemihydrate (α-HH) from FGD gypsum without any additives. In this process, an AlCl 3 solution was used to promote the conversion of calcium sulfate dihydrate (DH) to hexagonal prismatic α-HH with high strength at atmospheric pressure. The phase transition kinetics …
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Spray Dryer Absorber: The lime slurry is typically dispersed into fine droplets using a rotary atomizer and contacts the flue gas to facilitate the absorption of SO 2 and other acid gases. The water in the sorbent slurry completely evaporates into the flue gas, forming a solid waste product containing the captured SO 2.The SO 2 is captured …
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Hot flue gas flows into the top. Lime slurry is sprayed through an atomizer (e.g., nozzles) into the cylinder near the top, where it absorbs SO 2 and HCl. The water in the lime slurry is then evaporated by the hot gas. The scrubbed flue gas flows from the bottom of the cylindrical section through a horizontal duct.
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Purpose For an alkaline–saline region in Northwest China, we examined the responses of soil microbial communities to flue gas desulfurization gypsum by-products (FGDB), a new ameliorant for alkaline–saline soils. In 2009 and 2010, we collected soils from 0–20 cm and 20–40 cm depths along an experimental FGDB gradient (0, 0.74, …
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The major bottleneck in SO 2 desulfurization from flue gas is the constituents of the flue gas itself. A typical flue gas from coal-firing plant with medium to high sulfur content has 75–80 vol% N 2, 12–15 vol% CO 2, 1800 ppm SO 2, 500 ppm NOx, 5–7 vol% H 2 O, 3–4 vol% O 2, < 100 ppm CO, and 10–20 mg Nm −3 of …
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Four and one‐half, 9, and 18 mt/ha of either commercially available agricultural gypsum or two gypsum by‐products were applied to a Rayne soil (Fine‐loamy, mixed, mesic Typic Hapludult) with a strongly acid subsoil. Agricultural and FGD gypsum increased alfalfa DM yields by as much as 21 and 14%, respectively.
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Electro-oxidation flue gas desulfurization is a gas–liquid reaction, but the solubility of SO 2 in aqueous solution is very low with the solubility of only 9.4 g/100 mL at 25 °C. Thus it is necessary to strengthen the contact between SO 2 and ROSs to achieve successful flue gas desulfurization. Namely, the mass transfer of flue gas in electrolyte should be …
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Flue gas desulfurization gypsum (FGDG) is an industrial byproduct generated during the flue gas desulfurization process in coal-fired power plants. Flue gas desulfurization systems have been used to limit the release of sulfur dioxide from coal-fired power plants since the late 1960s, but in the past decade the production of FGDG …
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Flue gas desulfurization gypsum (FGDG) is an industrial by-product generated during the flue gas desulfurization process in coal-fired power plants. Due to …
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Flue gas desulfurization gypsum (FGDG), a solid waste material generated by power plants, offers a cost-effective solution for preparing backfill materials. Con
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The production of flue gas desulfurization gypsum poses a serious threat to the environment. Thus, utilizing gypsum-based self-leveling mortar (GSLM) stands out as a promising and effective approach to address the issue. β-hemihydrate gypsum, cement, polycarboxylate superplasticizer, hydroxypropyl methyl cellulose ether (HPMC), …
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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 …
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This article reviews the properties, production, and applications of flue gas desulfurized gypsum (FGD gypsum) in China, a by-product of coal combustion. It also …
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(11.2 Mt) of the CCPs consisted of gypsum from flue gas desulfurization (FGD). The desulfurization process uses wet scrubbers and forced oxidation to reduce SO 2 emissions, and the gypsum produced is mineralogically identical to natural gypsum (CaSO 4?2H 2O), making FGD gypsum an ideal replacement for the mined gypsum used to …
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Purpose Appropriate land management is important for improving the soil quality and productivity of the saline-sodic farmland. A recent study has revealed that flue gas desulfurization (FGD) gypsum and lignite humic acid application enhanced the salt leaching and crop production. The purpose of this study was to investigate the effects of …
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This research aims to study the utilization of waste from power plants, construction and demolition, and agriculture by varying the ratios of flue-gas desulfurization (FGD) gypsum, construction and …
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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 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 …
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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 …
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1. Introduction. In the industrial production of China, the processing of phosphate rock, volcanic eruptions, kerosene combustion and aluminum smelting will lead to flue gas emissions containing a large amount of SO 2.SO 2 is a highly irritating gas. Because SO 2 is freely soluble in water and enters the respiratory tract, it can generate …
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Jet mill grinding with superheated steam has been proven to be a novel and effective approach to improve the undesirable characteristics of flue gas desulfurization gypsum, significantly reducing the free water content (from 12.526% to 0.075%), crystallization water content (from 20.51% to 4.936%) and particle size (D 50 decreases …
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1. Introduction. The term Flue Gas Desulphurisation (FGD) system has traditionally referred to wet scrubbers that remove SO 2 emissions from large electric utility boilers. The FGD systems emerged in the industrial field of the coal-fired power plants and on some industrial processes in the early 1970s in United States (US) and Japan, and …
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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 SO 2 as CaSO 3, which is then converted to CaSO 4 through forced air ...
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The flue gas desulphurization (FGD) system removes the sulphur compounds (SO2, SO3) and acids from the flue gas. The majority of sulphur removal systems use wet FGDs, …
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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.
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The 11 major electricity-generating coal combustion stations in the northern Great Plains have the potential to produce almost 1 million Mg of flue gas desulfurization gypsum (FGDG) annually, which is a …
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The treatment of flue-gas desulfurization (FGD) gypsum, a common solid waste material that is often affected by chloride ions, typically occupies large amounts of land, causes resource waste, and results in …
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FGD gypsum was obtained commercially from Guixi Power Plant in Guangxi Province, China. The FGD gypsum had a free water content of 4.15 wt%, a dry density of 2.84 g/cm 3, and a pH of 6.89.The crystal morphology and mineral composition of the solid samples of FGD gypsum were analyzed through powder X-ray diffraction (XRD) …
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XRD, SEM and elemental characterization of FGD gypsum. X-ray diffraction analysis revealed that the characteristic peaks at 2θ value of 11.8, 20.8 and 23.5 (Fig. 2a) of the FGD gypsum 1 suggested ...
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