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 …
1. Introduction. 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 …
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.
At present, the continuous accumulation of the flue gas desulfurization (FGD) gypsum in steel plants leads to the serious environmental issues and resource waste. To achieve green and sustainable development for the steel industry, it is significant to improve the usage of by-product gypsum. Employing the sintering FGD gypsum, …
Saline-sodic soils cover ∼10% of the global land surface and deliver various ecosystem services to human society in the arid/semiarid regions. Flue gas desulfurization gypsum (FGDG), a byproduct from coal-fired power plants, is widely used to ameliorate saline-sodic soils. Here, we aimed to quantify …
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 …
The limestone wet method of FGD is reported to be the most widely used technology in the cleaning of acidic gases in flue gas streams from waste incineration plants . ... Westerlund, T. Modeling …
To verify the feasibility of applying dry flue gas desulfurization ash (DFGDA) to asphalt pavement materials, the asphalt mastic (filler and asphalt composition) prepared by adding different proportions of DFGDA and LSP (limestone powder) into 70# matrix asphalt was studied experimentally. The asphalt mastics were subjected to the …
Desulfurization gypsum dryer is applied for producing gypsum building materials for various purposes,which is widely used in building materials industry. Desulfurization Gypsum Dryer Feature 1. Using chemical gypsum (flue gas desulfurization gypsum, ardealit, etc) to stir-fry into β-hemihydrate gypsum powder; 2.
Flue gas desulfurization gypsum (FGDG), a solid waste material generated by power plants, offers a cost-effective solution for preparing backfill materials. Con
The scrubbing process is widely used to free flue gas from sulfur dioxide, and FGD gypsum is a by-product that originated in due process [6]. 'Wet-type …
The flue gas desulfurization (FGD) processes can be separated into two main categories: once-through and regenerable processes, depending on how the …
One industrial process that produces synthetic gypsum is flue-gas desulfurization (FGD), which is used to remove gaseous sulfur dioxide from boiler exhaust gas derived from coal-fired power plants, steel plants, and other heating plants. 8, 9 This is important because the reaction of sulfur dioxide with moisture generates sulfuric acid, …
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, …
F lue gas desulfurization gypsum (FGDG) is a synthetic gypsum that is created during the removal of SO 2 from flue gas by reacting the SO 2 with calcite …
Flue gas desulfurization gypsum (FGDG) is an industrial by-product generated during the flue gas desulfurization process in coal-fired power plants. Due …
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. ... Ordinary Portland cement (OPC), as one of the most common building materials, is widely used in civil engineering construction because of its easy accessibility and high …
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. …
This leads to a continuous increase in production of flue gas desulfurization gypsum (FGDG). Flue gas desulfurization can be generally divided into wet, semi-dry and dry processes, which generate different desulfurization products (Córdoba, 2015). The wet desulphurization is most widely applied due to its high efficiency, stable operation and ...
In order to obtain hydrophobic whisker for preparing polymeric composite product, the calcium sulfate whisker (CSW) prepared from flue gas desulfurization (FGD) gypsum by hydrothermal synthesis was modified by various surfactants, and the effects of some modification conditions on the hydrophobic property of CSW were …
Abstract: As a recycled material, flue gas desulfurization gypsum has been used to prepare calcium sulfate hemihydrate whisker (CSHW) through hydrothermal synthesis for several decades. However, the subsequent utilization of this resultant material has not yet received considerable attention. In the present research, CSHW was successfully …
3.1 Wet Scrubbers. Wet scrubbers are the most widely used FGD technology for SO 2 control throughout the world. Calcium-sodium based sorbents have …
The ongoing global climate change and the associated environmental degradation pose a threat to Europe and the rest of the world. Raw materials and energy are required to produce building materials, which are used for construction purposes. Resulting buildings and structures generate waste during construction, operation, and …
We take advantage of the strong stability of ferric irons and carboxyl groups to release lead ions. Flue gas desulfurization gypsum (FGDG) is a solid waste from coal-fired power plants. To date, wet flue gas desulfurization is most widely used in China because of its high removal efficiency of SO 2, stability, and low consumption [34].
of Suspension Absorbent Used in Flue Gas Desulfurization Systems Michał Głomba Faculty of Environmental Engineering, Wrocław University of Technology, Wrocław, Poland ... widely used in gypsum cardboard manufacturing. In 1994, the Dutch company Hoogovens Technical Services ... Lime spray dryer FGD 2.40 9.23 Ionizing radiation …
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 …
Flue Gas Desulfurization: Physicochemical and Biotechnological Approaches ... during the FGD process.9 Increased concentration of mercury in gypsum is detrimental in wallboard production.2 The gypsum slag is usually used for landfills where stacks of gypsum are frequently greater than 100 feet in height and cover several hundred acres of land ...
1. Introduction. China has implemented an energy structure upgrading plan to raise the proportion of clean energy, but coal power plants had a proportion of 43 % of the total installed capacity [1].Flue gases produced by burning coal only accord with national emission standards after the processes of dust removal, desulfurization, and …
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 ...
Effects of straw layer and flue gas desulfurization gypsum treatments on soil salinity and sodicity in relation to sunflower yield. Author links open overlay panel Yonggan Zhao a b c, Shujuan Wang a b c, ... (FGD) gypsum has been widely used for reclaiming the productivity of alkali soils. However, the available information on the …
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 …
1.1. Flue gas desulfurization processes. The flue gas desulfurization (FGD) processes can be separated into two main categories: once-through and regenerable processes, depending on how the sorbent is treated after SO 2 adsorption (Srivastava and Jozewicz, 2001).Once-through, or non-regenerable, processes utilize the sorbent as a …
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 …
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 …
Limestone-based FGD gypsum is one of the most commonly used by-products due to its abundance, purity and chemical and physical properties. ... Damle A …
1. Introduction. Flue gas desulfurized gypsum mainly comes from thermal power plants, smelters, and large-enterprise boilers, and contains industrial by-products …
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 …