According to the environmental constraints and stringent environmental regulations, the high efficiency sulfur removal processes have been considered in oil refinery industries (Babich and Moulijn 2003; Ismagilov et al. 2011; Song 2003; Wang and Yang 2018).Desulfurization processes can be classified into two main groups …
1. Introduction. As of present, fossil fuels, such as petroleum and coal, remain one of the primary sources of global energy [1], [2].During the combustion process of fossil fuels, sulfur dioxide is emitted into the atmosphere through flue gas [3], [4], [5].The release of sulfur dioxide poses significant risks to human health and the environment, resulting in …
The flue gas desulfurization process using scrubbers or sorbent is the most preferred treatment method in industrial applications due to high process maturity and high removal efficiency.
The semi-dry desulfurization process consists of injecting a pulverized suspension of slaked lime into the flue gas flowing through the reactor, where calcium hydroxide reacts with SO 2 in flue gas. The temperature of the process is 15–20°C higher than the dew-point of a Ca:S ratio of 1.2–1.8. ... In the wet FGD process, the limestone ...
Large amounts of industrial byproducts are generated during this washing process and are collectively termed limestone sludge (LSS). A separate process is required to deal with these by-products ...
Flue gas desulfurization (FGD) is a critical process for reducing sulfur dioxide (SO2) emissions from industrial sources, particularly power plants. This research uses calcium silicate absorbent ...
A metamorphic limestone and a dolomite were employed as SO2 sorbents in the desulfurization of gas from coal combustion. The tests were performed in a fluidized bed reactor on a bench and pilot...
Desulfurization: Limestone is utilized in the desulfurization process of iron and steel production. It reacts with sulfur compounds present in the molten iron to …
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; low vapor loading capacity since the solubility of sulfur oxides (SOx) in seawater is lower than that of limestone used in conventional methods; …
Flue-gas desulfurization processes can be classified as once-through or regenerable, depending on how the sorbent is treated after it has sorbed SO 2 or how the generated solids by the process are handled (Srivastava and Jozewicz, 2001; U.S. EPA, 2003c; Jafarinejad, 2016a). In once-through technologies, the spent sorbent is disposed of as a ...
Warych et al. [43, 44] established a model of the thermal power plant flue gas desulfurization process based on the thin film theory, which simulated the SO 2 absorption process and limestone ...
This blog post is the third in a three-part series that discusses flue gas desulfurization (FGD). The first post provides overviews of sulfur dioxide (SO 2) and emissions regulations, the FGD industry, and global FGD market trends.The second post provides high-level overviews of wet, semi-dry, and dry FGD technologies with respect …
Examples are illustrated here in relation to limestone dissolution taking place within the Wet Flue Gas Desulfurization process, where calcium carbonate is …
Desulfurization wastewater is industrial wastewater with a high salt content, high metal ions, and high hardness produced by flue gas desulfurization of the limestone-gypsum method in coal-fired power plants. This paper summarizes the source of desulfurization wastewater, water quality characteristics, water quality impacts, and …
Post-combustion flue gas desulfurization and denitrification technologies are essential in achieving the full compliance of fine particulate matter (PM 2.5, aerodynamic diameter less than 2.5 μm) air quality standards by 2030 in China as sulfur dioxide (SO 2) and nitrogen oxides (NO X) are the main precursors of PM …
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.
Wet Limestone Scrubbing Process Description. Figure 1 depicts a flow diagram for a typical wet limestone scrubbing flue gas desulfurization (FGD) process. Sulfur dioxide (SO 2) contained in the flue gas is absorbed by a limestone slurry sprayed from the header at the top of the absorber.
The industrial process of 129 WFGD consists of different sub-processes: the preliminary steps are limestone grinding, water-limestone 130 slurry preparation and flue gas adequation; the absorption ...
Semi-dry flue gas desulfurization was investigated with several kinds of SO 2 sorbents, such as slaked lime, limestone, Mg(OH) 2 and concrete pile sludge, in a powder-particle spouted bed. Slurry droplets including sorbent fine particles were fed to a spouted bed of coarse inert particles spouted with hot gas containing SO 2 . SO 2 removal efficiency …
Sulfur dioxide (SO2) can cause detrimental impacts on the ecosystem. It is well known that coal-fired power plants play a dominant role in SO2 emissions, and consequently industrial flue gas desulfurization (IFGD) systems are widely used in coal-fired power plants. To remove SO2 effectively such that ultra-low emission standard can …
DOI: 10.1016/j.seppur.2024.128425 Corpus ID: 270528235; Recent advances in process and materials for dry desulfurization of industrial flue gas: An overview @article{Ning2024RecentAI, title={Recent advances in process and materials for dry desulfurization of industrial flue gas: An overview}, author={Huanyuan Ning and …
Research on the application of gas-liquid mass transfer and desulfurization gypsum in the limestone-gypsum process has shown that the desulfurization rate can …
Dry desulfurization process. Dry desulfurization can be mainly divided into source control technology and end treatment technology from the process segment. Compared to the traditional wet/semi-dry desulfurization process, dry desulfurization has the characteristics of simple operation and low equipment investment, which has recently …
Injection of an alkaline absorbent into the flue gas can significantly reduce SO 2 and SO 3 emissions. The article presents alkaline absorbents employed in industrial processes to remove SO 2 and SO 3 from flue gases, detailing their characteristics and applications across various process conditions. It summarizes the mechanisms and …
paper presents a comprehensive review of the state of the art in flue gas desulfurization (FGD) technologies for coal-fired boilers. Data on worldwide FGD applications reveal …
These processes include both wet and dry type and are discussed next. A. Wet Once-Through FGD Processes These "once-through" processes make use of aqueous slurry of a sorbent for reacting with SO2 in the flue gas. 1. WET LIMESTONE PROCESS In this process, the limestone is crushed in a crushing station and slurry of lime is prepared.
SO 2 emissions are known to pose great harm to both human health and atmospheric air, and flue gas generated from coal-fueled power plant is the prime source of sulfur dioxide. For this reason, flue gas desulfurization (FGD) technology has found wide applications in most coal-fired power stations. Correctly describe the dynamic behavior …
5.5~5.8. The original desulfurization process water was industrial water. According to "Code for design of lime-stone / gypsum wet ue gas desulfurization system of fos - sil red power plant" (DL5196-2016), the ammonia nitro - gen, chloride ion, and COD of the process water shall not exceed 10 mg/L, 300 mg/L, and 30 mg/L, respectively.
Limestone slurries are widely utilized in wet flue gas desulfurization (WFGD) processes. The evaluation of the reagent's reactivity is fundamental for process design and plant operation. The comparison of different limestone and dolomite rocks through dissolution experiments was realized by applying a model for second-order …
By adding limestone, the desired chemical composition and properties of the steel can be achieved. It helps in controlling the levels of sulfur, phosphorus, and other impurities in the final steel product. 4. Desulfurization: Limestone is utilized in the desulfurization process of iron and steel production.
In wet-limestone scrubbers, the majority of ammonia slip is absorbed in the limestone-gypsum slurry and is present as ammonium (NH 4 +) ions whose effect on flue gas desulfurization process is thought to be positive, due to the increased efficiency of SO 2 removal. However, there is little to no literature data on the influence of ammonia …
A new wet limestone−gypsum process for flue gas desulfurization (FGD) has been developed. The main difference compared to a conventional wet FGD process is the ability of the new process to utilize granular limestone directly as a desulfurizing reagent. Thus, the pulverizing of limestone, which causes power consumption, can be …
Wet flue gas desulfurization was simulated to improve gypsum production using low-grade limestone. High-grade limestone with 94 wt% CaCO 3 content is used for producing gypsum with 93 wt% purity, but owing to the resource depletion of high-grade limestone, low-grade limestone should be replaced as an alternative. However, low …
1. Introduction. Flue gas desulfurization (FGD) involves the removal of sulphur dioxide (SO 2) contained in gases produced by the combustion of fossil fuels such as coal, oil, municipal solid waste and many industrial processes.SO 2 emissions are a primary contributor to acid rain and have been regulated by every industrialized nation in …
From the analysis above, it can be deduced that the desulfurization process by using low-grade limestone as SO 2 absorbent is divided into three stages: (1) SO 2 dissolves into LGL slurry firstly followed by the formation of SO 3 2−, HSO 3 − and H 2 SO 3 species [21]; (2) continuous dissolution of Ca-based compound including CaCO 3 and …
