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.
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 …
Fossil fuel combustion is a serious environmental problem. Significant quantities of flue gasses and wastewater, requiring further treatment, are produced. This article compares three wet flue gas desulfurization (FGD) wastewater treatment methods: coagulation with precipitation using iron(III) ions—recommended by the European Union …
The process produces CaSO 4 + 2 H 2 O (gypsum) as a byproduct of the chemical reaction in the absorber, along with small amounts of carbon dioxide (CO 2). This gypsum has a market value because it ...
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 …
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 …
In this study, the zero-valent iron Fenton reagent (ZVI Fenton-like) system was combined with the chemical precipitation method for the deep treatment of desulfurization wastewater from coal-fired power plants, and the chemical oxygen demand (COD) was used as the evaluation criterion for organic matter in the desulfurization …
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 ...
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 …
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].
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.
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 …
The treatment of flue-gas desulfurization (FGD) gypsum, a common solid waste ma-terial 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
This process identified various full-length articles and books from different online journals. However, the credibility of these articles was verified before citing each of them. 3. Bibliometric analysis. Bibliometric analysis is a useful tool for evaluating research progress on FGD (flue gas desulfurization) gypsum as a sustainable building ...
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 …
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 …
This paper proposed the new technical process to produce SO 2 and CaO by reducing the gypsum in multi-stage fluidized bed reactor with different atmosphere. In …
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 …
For water treatment processes, the FGD gypsum has mainly been utilized for the reduction of dissolved organic carbon and metal removal, among others. ... Details of the application of flue-gas desulfurization gypsum in the treatment of different types of water from Nadeesha H. Koralegedara et al 118. Application Water type Mechanism
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 …
The 1 ha research plot was established on the reclaimed tidal land in 2011, with 10 subplots separated by ditches that were 0.5 m deep.In the winter of 2011, five treatment levels of FGD gypsum (0, 15, 30, 45, and 60 Mg ha −1) were applied along with composted plant litter (30 Mg ha −1) to duplicate 1 × 1 m quadrats within each subplot.
The application of flue gas desulfurization gypsum (FGDG) improves the soil structure, reduces soil pH, and accelerates soil salt leaching.
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 ...
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 …
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 ...
This study investigated a new method for controlling the emission of fine particles through heterogeneous condensation. Specifically, the research focuses on the application of single-tower double-cycle desulfurization technology in the wet flue gas desulfurization process. The establishment of a supersaturation environment …
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 …
F lue gas desulfurization gypsum (FGDG) is a synthetic gypsum that is created during the removal of SO 2 from flue gas by …
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 …
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 …
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 …
Flue gas desulfurization gypsum (FGDG) is an industrial by-product generated during the flue gas desulfurization process in coal-fired power plants.
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 ...
FGD gypsum is a by-product of flue gas desulfurization (FGD) to remove sulfur dioxide emissions from coal-fired power plants. It has various applications in …
This article reviews various methods of flue gas desulfurization (FGD) to remove sulfur dioxide (SO2) from fossil fuel combustion. It also discusses the …
The results of basic characterization of the studied material using the vacuum water saturation method are shown in Table 2.The measurements of cumulative pore volume in Fig. 1, which are performed in the dependence on water/gypsum (w/g) ratio, show that porosity increases very fast with the increasing amount of water in the mixture …