Emission reduction process for dechlorinating flue‐gas …
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 …
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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 …
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To effectively solve the problem of recovery and utilization of flue gas desulfurized gypsum (FGDG), a new method for preparing SO2 gas by adding a mixture of FGDG and pyrite into a boiling furnace and utilizing its high-temperature waste heat is proposed. Using the FactSage 6.1 Reaction module and the Equilib module, the …
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DOI: 10.1016/j.jece.2024.112356 Corpus ID: 268224525; Resource utilization of semi-dry flue gas desulfurization ash by thermal treatment on sintering machine @article{Liu2024ResourceUO, title={Resource utilization of semi-dry flue gas desulfurization ash by thermal treatment on sintering machine}, author={Lincheng Liu …
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The results indicated that mercury could be released from desulfurization gypsum during aging process and the release process could be promoted via ultraviolet irradiation. ... Fig. 7 showed the content of mercury in gypsum sample B under dark treatment, 14 W, 24 W, 36 W and 55 W UV irradiation. The sample under five …
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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. ... Separation processes for the treatment of industrial flue gases – Effective methods for global industrial air pollution ...
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Semi-dry flue gas desulfurization ash (SFGDA) is an abandoned Ca and S resource that is currently stacked without appropriate disposal methods. A technology with industrialization potential, SFGDA, and iron ore thermal processing is an effective approach to obtaining calcium ferrite and industrial sulfuric acid. This study investigated the …
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In this paper, chemical precipitation process is used for the treatment of the desulfurization wastewater generated by the waste gas treatment system of the limestone-gypsum flue gas desulfurization process of a thermal power plant. After one year of operation, the technology is reliable and stable. The removal rate of suspended …
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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 composition of the modern FGDG, and its beneficial applications.
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Desulfurization Processes: Recent Developments and Improvements Nguyen Van Duc Long 1,*,y, ... process integration such as combined treatment of SOx and other gases, ... most of these processes generate solid waste, such as gypsum, which needs space for storage and is expensive to dispose of. Meanwhile, the high costs and the apparent …
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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 environmental pollution. An emission reduction process involving the dechlorination of FGD gypsum and reducing its emissions has been …
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Thermal treatment tests were conducted to simulate the heat treatment of FGD gypsum during the resource utilization processes. The thermal treatment of FGD gypsum included the following steps: 0.2 g of FGD gypsum were placed in a porcelain crucible, then positioned in a preheated electric blast oven (Shanghai Yiheng 9000, ±1 …
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A well-designed water treatment system can tolerate upstream fuel and sorbent variation over time and consists of multiple process treatment steps arranged in just the right order to produce ...
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Aiming to the problems mentioned above, some plants began to reform GGH or adopt new ways for heat exchanging. For example, at the end of last century, Japan Mitsubishi Corporation (MHI) [9] developed a new process (called as FGD-MGGH) to solve corrosion problems of GGH, which was shown in Fig. 1.The cooling heat exchanger of …
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Coal-fired power plants are facing the most stringent pollution discharge policy nowadays [1,2].The limestone-gypsum wet flue gas desulfurization (WFGD) process is the most widely used technology in …
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Gypsum is a byproduct of limestone–gypsum wet desulfurization. Because this gypsum has almost no economic value, it is not taken into consideration. ... In this ultra-clean flue gas treatment process for 315 MW unit, ten categories of environmental impact, i.e. climate change, terrestrial acidification, freshwater …
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The 2 Types of Flue Gas Desulfurization. The flue gas desulfurization processes can be separated into two main categories: Once-through processes and regenerable processes. Once-through is also known as non-regenerable, and is a process that utilizes the sorbent as a beneficial by-product or disposes of it as waste.
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Seawater flue gas desulfurization (SWFGD) is considered to be a viable solution for coastal and naval applications; however, this process has several drawbacks, including its corrosive absorbent ...
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The application of flue gas desulfurization gypsum (FGDG) improves the soil structure, reduces soil pH, and accelerates soil salt leaching.
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This article summarizes the research progress and problems of dry, semi-dry, and wet desulfurization technologies for flue gas desulfurization. It also …
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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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The massive accumulation of flue gas desulfurization (FGD) gypsum produced in the wet limestone-gypsum flue gas desulfurization process not only encroaches on lands but also causes serious environmental pollution. The preparation of α-hemihydrate gypsum (α-HH) is an important way to achieve high-value utilization of FGD gypsum. Although the …
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The trace elements will be captured in the gypsum slurry and wastewater produced by the FGD system, and then enriched in the desulfurized gypsum and sludge [7]. Currently, there are many tests and studies on emission reduction of trace elements in fly ash and desulfurization gypsum from power plants [8], [9].
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Calcium sulfate hemihydrate whiskers (CSHW), a multi-functional and high value-added building material, were prepared with flue gas desulfurization (FGD) gypsum by hydrothermal method, which could be a reasonable disposal of FGD gypsum. In order to obtain CSHW of a high aspect ratio, a series of manufacturing parameters such as …
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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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This work aims to investigate the effect of additional flue gas desulfurization gypsum (FGDG) on the properties of calcium sulfoaluminate cement (CSAC) blended with ground granulated blast furnace slag (GGBFS). The hydration rate, setting time, mechanical strength, pore structure and hydration products of the CSAC-GGBFS …
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F lue gas desulfurization gypsum (FGDG) is a synthetic gypsum that is created during the removal of SO 2 from flue gas by …
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The results indicated that mercury could be released from desulfurization gypsum during aging process and the release process could be promoted via ultraviolet irradiation. The release amount increased with the irradiation time and intensity (up to 25.1% of the total initial amount). ... There were many reports about mercury release …
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An integrated membrane process for the treatment of wastewaters from a flue gas desulfurization (FGD) plant was implemented on a laboratory scale to reduce their salt content and to produce a water stream to be recycled in the power industry. The process is based on a preliminary pretreatment of FGD wastewaters, which includes …
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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.
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Dense-phase-tower desulfurization technology is an emerging semi-dry flue-gas desulfurization ash process, i.e., the flue gas is allowed to enter the desulfurization tower from the bottom up and, at the same time, is sprayed with a desulfurizing agent that undergoes an acid–base reaction with the flue gas in the ascent …
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The S component inside can be liberated and collected to produce commercial sulfuric acid through a high temperature treatment process, while the calcium is recycled as CaO. ... Recent advances in flue gas desulfurization gypsum processes and applications–a review. J. Environ. Manag., 251 (2019), Article 109572, …
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