Improving the removal of fine particles by chemical agglomeration during the limestone-gypsum wet flue gas desulfurization process

Zhou, Ling; Liu, Yong; Luo, Lvyuan; Yuan, Zhulin; Yang, Linjun; Hao, W.

doi:10.1016/j.jes.2018.07.013

Cited by 29 publications

(5 citation statements)

References 14 publications

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“…This indicates that the agglomerated droplets are more likely to adhere to the fine particles after wetting, and the adsorption reaction between the fine particles leads to further growth of the particles. The results are consistent with the study of Zhou [10]. Wetting agents improve the wetting ability of dust.…”

Section: Effect Of Different Coupled Agglomerates On Fine Dust Particlessupporting

confidence: 92%

“…To improve the removal efficiency of fine particulate dust, researchers have proposed coagulation and agglomeration to increase larger particle size through physical and chemical action and then removing them by dust collectors, which has achieved certain results in practice [6]. The main current agglomeration techniques are acoustic, turbulent, electrical, and chemical [7][8][9][10]. Among them, chemical agglomeration technology was a very promising pretreatment means, and researchers have studied enhanced dust removal from coal-fired power plants [11] and sintering processes [12].…”

Section: Introductionmentioning

confidence: 99%

“…The main function of the wetting agent is to reduce the surface tension of the agglomerate; at this time, the agglomerate is easier to flow, so it also plays a role in reducing viscosity. In order to reduce the fugitive emission of fine particles from open-pit lignite mines, Yang [10] developed a lignite dust suppressant by using a mixture of 0.7% guar gum and 0.1% Triton X-100. At present, researchers have extensively studied the wetting performance of coal dust in coal-fired power plants [ [14][15][16] and found that wetting agents can effectively reduce surface tension and settling time, which in turn improves the wetting effect of coal dust.…”

Section: Introductionmentioning

confidence: 99%

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Study on Efficient Removal Method of Fine Particulate Dust in Green Metallurgy Process

Li,

Xue,

Zhang

et al. 2023

Processes

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In order to solve the problem of the low removal efficiency of fine particles in the flue gases of the metallurgy process, a chemical agglomeration pretreatment method was studied. The coagulant solution of xanthan gum, konjac gum, and their mixtures was selected to research the reunion effects of and the efficiency of gravitational dust removal of fine dust in the gas of the converter flue using a self-built experimental platform. Moreover, the effects of wetting agent type, dust concentration, pressure, and flue gas velocity on the fine grain removal efficiency were investigated. The results showed that the mixed solution of 1 g/L mixed gum and 0.5 g/L SDS had the most obvious effect on the particle size increasing of fine dust particles and the best removal effect when the flue gas velocity was 10 m/s. There was a peak particle size of 85.32 μm increased about eight times larger, and the removal efficiencies reached 51.46% for PM2.5 and 53.13% for PM10. The Box–Behnken experimental design combined with a response surface analysis method was used to optimize the parameters of the mixed gum concentration, pressure, and flue gas velocity. The optimal removal conditions were 1 g/L, 0.4 MPa, and 10 m/s. The results of this study can provide efficient methods and technical support for pre-processing and efficient removal of fine particles in heavy-polluting industries such as steel making. This will promote the green development of the metallurgical industry.

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Section: Effect Of Different Coupled Agglomerates On Fine Dust Particlessupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Study on Efficient Removal Method of Fine Particulate Dust in Green Metallurgy Process

Li,

Xue,

Zhang

et al. 2023

Processes

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“…Sulfide ions (S 2− ) in wastewater can corrode metal materials, poison the human body, and release malodorous gases, posing serious hazards to the human health and environment (Liang et al, 2020;Liu et al, 2020;Zhang et al, 2018b). Gas extraction method (Zhou et al, 2019), biological method (Qian et al, 2019), and precipitation method (Liu et al, 2019) are traditional methods for removing S 2− from wastewater. However, the gas extraction method consumes extensively large amount of energy sulfuric acid (H 2 SO 4 ) as the electrolyte (Tang et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Feooh and Feooh@zno by Hydrothermal Method and the Adsorption of S2- In Wastewater

Meng

et al. 2022

Journal of Environmental Engineering and Landscape Management

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FeOOH and FeOOH@ZnO were prepared by hydrothermal synthesis, and their structures and adsorption properties toward S2− were studied. The results showed that too high hydrothermal temperature was not conducive to the adsorption of S2−. However, using sodium dodecyl sulfate (SDS) for FeOOH preparation and adding nanometer ZnO (FeOOH@ZnO) could significantly improve the adsorption of S2− by FeOOH, and adsorption removal rate was close to 90.0% and adsorption amount was 87.5 mg·g−1. The structural analysis showed that the modification of FeOOH by SDS and the addition of nano-ZnO resulted in the reduction in size of the FeOOH particles, forming amorphous inclusion structure with ZnO present inside and FeOOH outside. The specific surface area of FeOOH@ZnO was found to be higher than that of FeOOH. Therefore, it is beneficial to the adsorption of S2−. XPS fitting results showed that ferrous deposits appeared in the process of adsorption of S2− by FeOOH@ZnO, and it was considered that the oxygen of Fe = O was replaced with sulfur.

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“…By improving the mass transfer efficiency inside the WFGD, the removal of both gaseous pollutants and PM (including the formed sulfuric acid aerosols) can be facilitated. Generally, several types of scrubbers are used for WFGD, including the most widely used spraying scrubber, 28 venture scrubber, 29 bubble scrubber, 30 etc. Different gas−liquid flow patterns can be formed in these scrubbers.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Synergetic Removal of SO₃, SO₂, and Particulate Matter in a Gas–Liquid Flow Pattern-Controlling Column Coupled with Ultrasonic Wave

Chen

Jiang

Wang

et al. 2020

Ind. Eng. Chem. Res.

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The synergetic removal of multiple pollutants in flue gas was investigated in a gas−liquid flow pattern-controlling (FPC) column coupled with ultrasonic wave (UW). A pilot-scale experimental setup with a gas flow rate of up to ∼432 m 3 /h was developed for the removal of SO 2 , SO 3 , and fly ash. A comparative study was conducted between the FPC column and the traditional open spraying (OS) column to show the superiority of the FPC column. In general, the synergetic purification performance was significantly improved by using the FPC and UW. The SO 3 aerosol removal efficiency in the FPC column was about 9.9% higher than that in the OS column. At a liquid-to-gas ratio (L/G) of 10 L/Nm 3 , the efficiency of SO 2 , SO 3 , and fly ash particle removal increased by 8.7, 5.3, and 6.6% with the introduction of UW, respectively. This enhancement effect of the UW became greater with increasing the L/G due to the increased liquid holdup. Furthermore, the energy consumption analysis was applied based on an actual WFGD system of a 660 MW power plant to estimate the energy penalty of the FPC and FPC-UW columns.

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Improving the removal of fine particles by chemical agglomeration during the limestone-gypsum wet flue gas desulfurization process

Cited by 29 publications

References 14 publications

Study on Efficient Removal Method of Fine Particulate Dust in Green Metallurgy Process

Study on Efficient Removal Method of Fine Particulate Dust in Green Metallurgy Process

Synthesis of Feooh and Feooh@zno by Hydrothermal Method and the Adsorption of S2- In Wastewater

Experimental Investigation on the Synergetic Removal of SO₃, SO₂, and Particulate Matter in a Gas–Liquid Flow Pattern-Controlling Column Coupled with Ultrasonic Wave

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Improving the removal of fine particles by chemical agglomeration during the limestone-gypsum wet flue gas desulfurization process

Cited by 29 publications

References 14 publications

Study on Efficient Removal Method of Fine Particulate Dust in Green Metallurgy Process

Study on Efficient Removal Method of Fine Particulate Dust in Green Metallurgy Process

Synthesis of Feooh and Feooh@zno by Hydrothermal Method and the Adsorption of S2- In Wastewater

Experimental Investigation on the Synergetic Removal of SO3, SO2, and Particulate Matter in a Gas–Liquid Flow Pattern-Controlling Column Coupled with Ultrasonic Wave

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Product

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Experimental Investigation on the Synergetic Removal of SO₃, SO₂, and Particulate Matter in a Gas–Liquid Flow Pattern-Controlling Column Coupled with Ultrasonic Wave