ارتباط با ما
با ما تماس بگیرید
0086-21-58386256
0086-21-58386256
Introduction. Flue gas desulfurization (FGD) is the removal process of sulfur dioxide (SO2) from flue gases. Sulfur dioxide in gases is produced by the combustion of fossil fuels and many industrial processes such as gasoline refining as well as cement, paper, glass, steel, iron and copper production.
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) (D/MAX 2500 V, Rigaku, …
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 ...
Flue gas desulfurization (FGD) process is the most widely used for ( {text{S}}{{text{O}}_2} ) capture in the world, which produce large amount of desulfurization gypsum . It is quite important to find a solution for comprehensive utilization of such desulfurization gypsum not only in the view of environment protection but also economic.
Comparative Analysis of Flue Gas Desulfurization Technologies in China's Energy Sector . Li Yizhe. 1,a,* 1. Northwest Normal University, 967 Anning E Rd, Lanzhou, China . a. ... Plant in Chongqing introduced two sets of limestone (lime) – gypsum flue gas desulfurization equipment from Mitsubishi Heavy Industries in Japan, equipped with two ...
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 demolition waste (CDW), and oil palm trunks (OPT) in concrete production. This research used these as the raw materials for the production of concrete bricks of 15 × 15 × 15 …
In order to explore the influence of the types of waste gypsum on the properties of alkali slag cement, fluorogypsum (FG) and flue-gas desulfurization (FGD) gypsum were comparatively investigated. Moreover, the action mechanisms of FG and FGD gypsum on the properties of alkali slag cement were analyzed. The results show that both the FG and FGD …
Flue gas desulfurized gypsum (FGD gypsum), mainly originates from thermal power plants, smelters, and large-scale enterprise boilers.This article reviews the production in …
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. The different …
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 gypsum …
Abstract 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 was...
1. Introduction. Flue gas desulfurized gypsum mainly comes from thermal power plants, smelters, and large-enterprise boilers, and contains industrial by-products produced …
Flue gas desulfurization Flue gas desulfurization is commonly known as FGD and is the technology used for removing sulfur dioxide (SO 2) from the ... O and sold as a by-product gypsum. Spray-dryer Spray-dryers are used upstream of the particulate removal equipment (electrical precipitator or filter baghouse) where the flue gas ...
Salt-Affected Soil Amelioration with Flue Gas Desulfurization By-Products and Waste Gypsum Board in Tianjin, China Yuji S AKAI 1, Shunrong R EN 2, Chang W ANG 3 and
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.
Flue gas desulfurized gypsum (FGD gypsum), mainly originates from thermal power plants, smelters, and large-scale enterprise boilers. This article reviews the production in China and the latest ...
The technology of flue gas desulphurisation (FGD) has a long history, with the first major FGD installation taking place at Battersea power station in the UK as far back as 1931. ... SO2 in the flue gas is removed, via a complex series of chemical reactions, to produce calcium sulphate (gypsum) and sulphite salts – what is known as the ...
[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. Google Scholar
In recent years, the global production of flue gas desulfurization gypsum (FGDG) has surged, with annual emissions exceeding 255 million tons [].Currently, with the continuous increase in energy consumption and increasingly stringent environmental requirements, the production of FGDG in China has exceeded 100 million tons [].The …
The thermal instability of most mercury (Hg) species in flue gas desulfurization (FGD) gypsum may lead to the release of large amounts of Hg into the atmosphere. In this study, gypsum samples were collected from 13 major coal-fired power plants (CFPPs) for evaluating the Hg thermal stability within a temperature range of 100–200 °C.
Flue gas desulfurization gypsum and commercial gypsum were applied at rates of 0, 2.24, 11.2, and 22.4 Mg ha −1 to two soils in southwestern North Dakota in the spring of 2007. Soil and grain chemistries were monitored …
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.
Flue gas desulfurization gypsum (FGDG), the by-product of wet and semi-dry desulfurization processes, has been used as an alkali soil amendment in China. We …
Thereafter, the desulfurization process can remove a portion of the trace elements from the flue gas 52, 84; chloride enters the FGD gypsum through this process. 85-87 Furthermore, Chang et al 88 found that the …
Purpose Soil salinization is considered as the most important abiotic stress limiting crop production and degrading soil properties. The purpose of this study was to investigate the effects of applied flue gas desulfurization (FGD) gypsum and humic acid on the amelioration of coastal saline-sodic soil and their influence on rapeseed yield. Materials and methods A 3-year …
EPA-CICA Fact Sheet Flue Gas Desulfurization1 Name of Technology: Flue Gas Desulfurization (FGD) - Wet, ... (gypsum) are available (Cooper, 2002). In 1998, approximately 3% of FDG systems installed in the US were regenerable. ... or spray dryers, inject an aqueous sorbent slurry similar to a wet system, however, ...
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 Synfuels Company, 1982; Tilly, 1983; …
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 glycerol …
The gypsum by-product can be recycled or disposed of. The primary reaction in this process occurs in the absorption tower. The absorbent delivered to the tower, a limestone …
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 processing ...
