Numerical simulation research of flow field in ammonia-based wet flue gas desulfurization tower

Wang, S.J.; Zhu, Ping; Zhang, G.; Zhang, Q.; Wang, Z.Y.; Zhao, Lingling

doi:10.1016/j.joei.2014.09.002

Cited by 46 publications

(18 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Watson et al (1999) attempted to add a canopy over the flue gas inlet in the desulfurization tower to obtain a more uniform flow field distribution. Currently, the main instruments used in wet desulfurization include rotating packed beds, impinging stream reactors, and absorption towers, and the desulfurization rates of these three instruments are ≥ 80%, ≥ 90%, and 68%-90%, respectively (Chang et al, 2011;Gong and Yang, 2011;Wang et al, 2015;Kobayashi et al, 2016). Absorption towers are widely used in the desulfurization industry, but they exhibit problems such as a large land area required, high operation cost, and equipment corrosion and fouling (Michalski, 2000;Bao et al, 2012;Zhu et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Application of Gas Cyclone-Liquid Jet Absorption Separator for Flue-Gas Desulfurization

Wang

Yang

et al. 2017

Aerosol Air Qual. Res.

View full text Add to dashboard Cite

A gas cyclone-liquid jet absorption separator integrates the functions of cyclone separation, liquid jet atomization, and absorption separation. This study employed this device to conduct a wet flue-gas desulfurization experiment on a gas mixture consisting of air in room temperature and sulfur dioxide (SO 2 ) to explore this device's prospect of tail gas purification. Sodium hydroxide (NaOH) and sodium carbonate (Na 2 CO 3 ) solutions at various concentrations were used as absorbents under room temperature. The changes in the SO 2 removal efficiency and air pressure drop were investigated with parameters including total gas flow, SO 2 concentration in the flue gas, and absorbent flow. The SO 2 removal efficiency increased to a certain extent as the absorbent concentration, total gas flow, and absorbent flow increased. The maximum SO 2 removal efficiencies of NaOH and Na 2 CO 3 were 85% and 77%, respectively. Under identical experimental conditions, the changes in SO 2 removal efficiencies of NaOH and Na 2 CO 3 exhibited essentially identical trends, in which NaOH exhibited a 5%-8% greater SO 2 removal efficiency than Na 2 CO 3 .

show abstract

Section: Introductionmentioning

confidence: 99%

Application of Gas Cyclone-Liquid Jet Absorption Separator for Flue-Gas Desulfurization

Wang

Yang

et al. 2017

Aerosol Air Qual. Res.

View full text Add to dashboard Cite

show abstract

“…The experimental results verified the validity of the model. Wang et al [5] simulated the two-phase flow field of sintered flue gas desulfurization tower using ANSYS CFX software. The simulation results showed that the gas-liquid contact time was long when the flow field was uniform, and the pressure drop mainly occurred in the absorption zone, which provides a reference for improving the desulfurization efficiency of the desulfurization tower.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of flow field optimization in Flue Gas Desulfurization Tower with Wet Spray

2020

IJM

View full text Add to dashboard Cite

The combustion of fossil fuels will not only produce a lot of carbon dioxide, but also convert sulfur into sulfur dioxide, which will seriously pollute the atmosphere. Rapid and efficient desulfurization is very important for enterprises that consume a lot of fossil fuels. This paper briefly introduced the sulfur removal principle and the mathematical model of flue gas flow of the wet spray method. After that, the flow field of the desulfurization tower before and after optimization was simulated by ABAQUS software, and the model test was carried out under the similar condition by using the model whose scale was reduced 10 times. The results showed that the velocity distribution of the spray layer and smoke outlet in the section velocity distribution map obtained by numerical simulation was not even and the velocity distribution after optimization was obviously uniform, while the velocity distribution of the demisting layer before and after optimization was relatively uniform and had little change. The results obtained by the test of the model with the reduced scale were close to the numerical simulation results, and the removal rate of sulfur dioxide was greatly improved after optimization.

show abstract

“…The spraying droplets have dual duties for the performance of the column. One is to provide interfacial area for mass transfer, and the other is to adjust the gas distribution to get flow uniformity . For the former one, under a fixed liquid flow rate, the dispersed droplets need to be as small as possible to provide higher specific surface area for mass transfer, whereas for the latter one, the adjustment effect of droplets on gas flow follows the droplet self‐adjustment effect, bigger droplets are required to fulfill the prerequisite of droplet self‐adjustment effect, which is the countercurrent across the whole column.…”

Section: Introductionmentioning

confidence: 99%

Synergistic effect between spraying layers on the performance of the WFGD spray column

Wang

Dai

2018

Asia-Pacific J Chem Eng

View full text Add to dashboard Cite

In a WFGD spray column, spraying droplets have dual duties of optimizing flow uniformity and providing interfacial area for mass transfer but have contradiction in selection of diameter. In this paper, a synergistic effect between smaller and bigger droplets is proposed to improve the performance of the column, which is to enlarge the interfacial area and optimize the flow uniformity in different layers, and it is used to create a novel design scheme. Through the study of the flow uniformity in the spray column, the detail of this design scheme is proposed as followed: The minimum flow rate and proper droplet diameter should be selected in the bottom layer to achieve the flow uniformity, and smaller droplets can be used in the rest layer to enlarge the interfacial area as much as possible. Compared with the traditional scheme, the liquid hold-up has increased 16%-30%, and the interfacial area has increased 32%-56% in novel scheme. In practice, this novel design scheme can provide reference and guidance for large scale spray columns. KEYWORDS droplet self-adjustment effect, flow uniformity, interfacial area, synergistic effect

show abstract

Numerical simulation research of flow field in ammonia-based wet flue gas desulfurization tower

Cited by 46 publications

References 14 publications

Application of Gas Cyclone-Liquid Jet Absorption Separator for Flue-Gas Desulfurization

Application of Gas Cyclone-Liquid Jet Absorption Separator for Flue-Gas Desulfurization

Numerical Simulation of flow field optimization in Flue Gas Desulfurization Tower with Wet Spray

Synergistic effect between spraying layers on the performance of the WFGD spray column

Contact Info

Product

Resources

About