Optimal design of a wet-type desulphurization absorber by the numerical simulation method

Xiao, Youye; Li, C.T.; Li, S.H.; Zeng, Guangming; Wen, Qingbo; Guo, Guangyu; Song, Jianfei

doi:10.1016/j.cherd.2013.10.026

Cited by 10 publications

(6 citation statements)

References 41 publications

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“…SO 2 is absorbed by the seawater, and the gas leaves the column through the top of the absorber. The following assumptions have been introduced in the model: (1) The gradient of the concentration and temperature in the angular direction is neglected, and the system is considered as one-dimensional; i.e., the flow pattern follows a plug flow model. 16 (2) The difference of the temperature along the absorber and heats of reaction and dissolution are neglected.…”

Section: Modelingmentioning

confidence: 99%

“…It is well-known that sulfur dioxide (SO 2 ) damages human health and causes acid rain, which has led to stringent environmental regulations for reducing its emissions. − Up to now, many technologies have been proposed and studied for reducing emissions, because those are based on spray dryer absorbers, fluidized-bed flue gas desulfurization (FGD), wet scrubbers, seawater scrubbers, ultraviolet (UV)/H 2 O 2 advanced oxidation, packed bed columns, venturi scrubbers, membrane contactors, anion-functionalized ionic liquids, and plasma electrostatic precipitators. − Seawater FGD can be used for coastal industries in a simple contactor, and SO 2 is absorbed into lean seawater. Rich seawater containing acid gas is further oxidized and returned to the sea.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Two-Dimensional Mathematical Model for Flue Gas Desulfurization in a Spray Column at Low Temperatures with Seawater: Design and Optimization

2016

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The industrial SO2 absorption process using seawater has been mathematically modeled using a two-dimensional model to obtain velocity profiles and SO2 concentrations in the gas and liquid phases at low temperatures in a spray column. A study has been conducted involving the influence on the SO2 removal efficiency of seven design and operating parameters, namely, the gas flow rate, liquid flow rate, gas inlet temperature, liquid inlet temperature, operating pressure, droplet size, and column diameter. The optimization of the plant has been performed using the practical method of response surface methodology (RSM), and the optimum values for the operating variables have been determined. Furthermore, the interactions between the variables have been assessed, and a simple and reliable correlation (regression coefficient, R 2 = 0.9623) has been proposed to predict SO2 removal efficiency.

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Section: Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Two-Dimensional Mathematical Model for Flue Gas Desulfurization in a Spray Column at Low Temperatures with Seawater: Design and Optimization

2016

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“…In addition to adjusting operating parameters, changing the tower structure is also an optimization method. Xiao [9] simulated PCF (a wet flue gas desulfurization absorber) with different inlet structure forms, and chose the best PCF inlet structure to reduce design time and economic cost.…”

Section: Introductionmentioning

confidence: 99%

Effect of Gas-Liquid Contact Intensification on Heat and Mass Transfer in Deflector and Rod Bank Desulfurization Spray Tower

Jin

Wenju

Li³

2021

Processes

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The deflector and the rod bank are commonly used to optimize flue gas distribution in the original spray tower (OST) of a wet flue gas desulfurization system (WFGD). In this paper, the internal optimization mechanism of the deflector desulfurization spray tower (DST) and the rod bank desulfurization spray tower (RBST) are studied. Based on the Euler–Lagrange method, the standard k-ε turbulence model, an SO2 absorption model and a porous media model, the numerical simulation of the desulfurization spray tower is carried out with the verification of the model rationality. The results show that there are gas-liquid contact intensification effects in DST and RBST. Compared with OST, gas-liquid contact intensification enhances the heat and mass transfer effects of DST and RBST. The temperature difference between inlet and outlet of flue gas increased by 3.3 K and the desulfurization efficiency of DST increased by 1.8%; the pressure drop decreased by 37 Pa. In RBST, the temperature difference between the flue gas inlet and outlet increased by 5.3 K and the desulfurization efficiency increased by 3.6%; the pressure drop increased by 33 Pa.

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“…Where α1、α2 was empirical constant; u was the relative velocity of gas and slurry particles, m/s; d was the average diameter of particles, m. Using user-defined functions (UDF) described the absorption rate equation of SO2, being got on the basis of equation (3). So the absorption process of SO2 could be simulated by CFD.…”

Section: Two-film Theorymentioning

confidence: 99%

“…Xiao etc. [3]studied the effect on flow field under several different inlet boundary conditions. Geng Ping [4] by numerical simulation, it illustrated that conventional spray layer was easy to form dead zone and gas corridor.…”

Section: __________________________mentioning

confidence: 99%

Simulation Study on the Desulfurization Efficiency Based on Swirl Atomizing

Ding-ping¹,

Cui²,

Shang³

2017

dtcse

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Based on the kinetics of chemical reaction, the theory of turbulent diffusion and the theory of mass transfer, the turbulent flow of flue gas in the desulfurization tower was described by standard k -εmodel, and Lagrangian discrete phase model was employed to solve the particle momentum. The SO2 absorption model of wet flue gas desulfurization (WFGD) tower was established, and swirl atomizing layer (SAL) was installed on the tower. The concentration distribution of SO2 was simulated using CFD method. The results showed that SAL could improve the desulfurization efficiency.

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Optimal design of a wet-type desulphurization absorber by the numerical simulation method

Cited by 10 publications

References 41 publications

Two-Dimensional Mathematical Model for Flue Gas Desulfurization in a Spray Column at Low Temperatures with Seawater: Design and Optimization

Two-Dimensional Mathematical Model for Flue Gas Desulfurization in a Spray Column at Low Temperatures with Seawater: Design and Optimization

Effect of Gas-Liquid Contact Intensification on Heat and Mass Transfer in Deflector and Rod Bank Desulfurization Spray Tower

Simulation Study on the Desulfurization Efficiency Based on Swirl Atomizing

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