Analysis of thermal and water equilibrium and desulfurization efficiency after waste heat recovered from a wet flue gas desulfurization system

2020 ◽  
Vol 15 (2) ◽  
Author(s):  
Jun Jiang ◽  
Houwen Yang ◽  
Feng Liu ◽  
Xianfu Zhang ◽  
Hongyuan Wei
Keyword(s):  
Flue Gas ◽  
Waste Heat ◽  
Flue Gas Desulfurization ◽  
Desulfurization Efficiency ◽  
Water Equilibrium

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

Processes ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 1269
Author(s):  
Yuzhen Jin ◽  
Weida Zhao ◽  
Zeqing Li
Keyword(s):  
Mass Transfer ◽  
Pressure Drop ◽  
Heat And Mass Transfer ◽  
Temperature Difference ◽  
Flue Gas ◽  
Flue Gas Desulfurization ◽  
Spray Tower ◽  
Porous Media Model ◽  
Desulfurization Efficiency ◽  
Optimization Mechanism

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.

Experimental Study on Desulfurization Enhanced by Additive in Limestone-Gypsum FGD Process

2014 ◽  
Vol 675-677 ◽  
pp. 422-425
Author(s):  
Jun Xia Liu
Keyword(s):  
Flue Gas ◽  
Gas Flow ◽  
High Efficiency ◽  
Ph Value ◽  
Flue Gas Desulfurization ◽  
Gas Flow Rate ◽  
Lime Solution ◽  
Desulfurization Efficiency ◽  
Technical Features ◽  
Hexanedioic Acid

This Paper introduced the research background and technical features of the simulative experiments in the laboratory with the sorbent of lime solution without lime particles. By means of the effects of various influencing factors on SO2 removal efficiency were studied carefully. These parameters include gas flow rate (G), inlet SO2 concentration, liquid-to-gas ratios, the height of the packing and the additive, at the same time menstruating the pH value of the liquid flowing from the tower. To improve desulfurization efficiency of limestone in the wet flue gas desulfurization (WFGD), effect of the hexanedioic acid additive on limestone desulfurization agent were studied. The result shows that this system has advantages of high efficiency, stable, low investment and low circulating cost. The result could give a reference to optimization and will be helpful in selecting desulfurization techniques.

scholarly journals Dolomites as SO2 Sorbents in Fluid Combustion Technology

Resources ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 121
Author(s):  
Elżbieta Hycnar ◽  
Tadeusz Ratajczak ◽  
Magdalena Sęk
Keyword(s):  
High Temperature ◽  
Flue Gas ◽  
Sorption Process ◽  
Raw Material ◽  
Flue Gas Desulfurization ◽  
Material Base ◽  
Thermal Transformations ◽  
Combustion Technology ◽  
Desulfurization Efficiency

Dolomites are not used as SO2 sorbents in fluid combustion technology. The literature data show fundamental discrepancies in the possibility of such use. They mainly concern the role of magnesium in the sorption process of SO2 and the durability of desulfurization products under high-temperature conditions. The article demonstrates that MgO is actively involved in the SO2 binding under fluidized furnace conditions. The resulting products of sulfation contain magnesium in their compositions, and their thermal transformations begin only after the temperature exceeds 1100 °C. It has been shown that dolomites are a potential raw material for the production of SO2 sorbents for fluid combustion technology, and their use is justified due to the higher desulfurization efficiency. Parameters of dolomite descriptions were given, by which it will be possible to predict the effects of flue gas desulfurization before the dolomites’ use in industrial conditions. It has been shown that there are opportunities to expand the domestic raw-material base for the production of SO2 sorbents, based on both dolomite resources present in deposits and dolomite waste accumulated in dumps, as well as generated during the current exploitation and processing of dolomites.

scholarly journals Advanced and Intensified Seawater Flue Gas Desulfurization Processes: Recent Developments and Improvements

Energies ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5917 ◽  
Author(s):  
Nguyen Van Duc Long ◽  
Dong Young Lee ◽  
Kim Myung Jin ◽  
Kwag Choongyong ◽  
Lee Young Mok ◽  
...  
Keyword(s):  
Flue Gas ◽  
Gas Flow ◽  
Process Integration ◽  
Waste Heat ◽  
Combined Treatment ◽  
Industrial Applications ◽  
Operating Conditions ◽  
Flue Gas Desulfurization ◽  
Loading Capacity ◽  
Equipment Size

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; high seawater flowrate; and large equipment size. This has prompted process industries to search for possible advanced and intensified configurations to enhance the performance of SWFGD processes to attain a higher vapor loading capacity, lower seawater flowrate, and smaller equipment size. This paper presents an overview of new developments as well as advanced and intensified configurations of SWFGD processes via process modifications such as modification and optimization of operating conditions, improvement of spray and vapor distributors, adding internal columns, using square or rectangular shape, using a pre-scrubber, multiple scrubber feed; process integration such as combined treatment of SOx and other gases, and waste heat recovery; and process intensification such as the use of electrified sprays, swirling gas flow, and rotating packed beds. A summary of the industrial applications, engineering issues, environmental impacts, challenges, and perspectives on the research and development of advanced and intensified SWFGD processes is presented.

MAT 21

Alloy Digest ◽  
1997 ◽  
Vol 46 (12) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Flue Gas ◽  
Heat Exchangers ◽  
Crevice Corrosion ◽  
Fossil Fuel ◽  
Waste Heat ◽  
Dew Point ◽  
Flue Gas Desulfurization ◽  
Tantalum Alloy ◽  
Very High

Abstract MAT 21 is a nickel-20 chromium-20 molybdenum-2 tantalum alloy. The very high molybdenum and tantalum content gives excellent general, pitting, and crevice corrosion resistance. The alloy was developed to be resistant to sulfuric acid dew point corrosion. Applications include scrubbers for flue gas desulfurization and heat exchangers to recover waste heat at low temperatures in fossil fuel fired plants. The corrosion resistance of welded joints does not degrade in the as-welded condition. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fracture toughness. It also includes information on low and high temperature performance, and corrosion resistance. Filing Code: Ni-532. Producer or source: Mitsubishi Materials Corporation, Okegawa Plant.

Energy-Saving Application of Heat Pipe GGH in Wet Flue Gas Desulfurization System

2012 ◽  
Vol 608-609 ◽  
pp. 1177-1180 ◽  
Author(s):  
Hui Min Liang ◽  
Jie Zhang ◽  
Yuan Yuan Cai
Keyword(s):  
Power Consumption ◽  
Heat Pipe ◽  
Flue Gas ◽  
High Efficiency ◽  
Acid Corrosion ◽  
Flue Gas Desulfurization ◽  
Fluid Resistance ◽  
Operation And Maintenance ◽  
Low Costs ◽  
Desulfurization Efficiency

In order to heat the gas of Boiler tail to comply with request of emission temperature of environmental regulations, heat pipe gas to gas heater (GGH) is used in the wet flue gas desulfurization (FGD) system. Heat pipe GGH is characterized by high efficiency, small losses of fluid resistance, and no leak of the flue gas, and desulfurization system possesses higher desulfurization efficiency, no additional power consumption, low costs of operation and maintenance, and it also solves the problem of acid corrosion and scaling, which is more suitable for wet flue gas desulfurization system.

Efficiency Prediction of Limestone-Gypsum Wet Desulphurization Based on Support Vector Machine

2014 ◽  
Vol 989-994 ◽  
pp. 913-917
Author(s):  
Jian Meng Yang ◽  
Bo Shuo Sun ◽  
Nian Zhe Qi
Keyword(s):  
Support Vector Machine ◽  
Power Plant ◽  
Parameter Optimization ◽  
Flue Gas ◽  
Forecast Model ◽  
High Accuracy ◽  
Flue Gas Desulfurization ◽  
Support Vector ◽  
Mean Square ◽  
Desulfurization Efficiency

This paper studies the prediction of power plant desulfurization efficiency, based on support vector machine through the meshing method for parameter optimization, establish a prediction model, with the running of the actual data to predict the results: mean square error (MSE) is 0.00259324, the correlation coefficient (R) is 0.979927%, the largest error is less than 1.5%, the results show that the established forecast model based on support vector machine (SVM) with high accuracy to predict the desulfurization efficiency, and can satisfy the engineering need of flue gas desulfurization efficiency prediction.

Study on Swirl Composite Fluidization Mode with Circulating Fluidized Beds for Flue Gas Desulfurization

2011 ◽  
Vol 233-235 ◽  
pp. 915-919 ◽  
Author(s):  
Xiao Wen Hao ◽  
Chun Yuan Ma ◽  
Qiang Zhao
Keyword(s):  
Flow Field ◽  
Cross Sections ◽  
Flue Gas ◽  
Fluidized Beds ◽  
Flue Gas Desulfurization ◽  
Circulating Fluidized Beds ◽  
Cold Condition ◽  
Turbulent Velocity Fluctuation ◽  
Test Flow ◽  
Desulfurization Efficiency

Circulating Fluidization Bed (CFB) for Flue Gas Desulfurization (FGD) is widely used. But its desulfurization efficiency is lower than Wet FGD. Its investment is not much lower than Wet FGD. Flow field of CFB for FGD is hard to be uniform. Swirl Composite Fluidization Mode (SCFM) was brought forward compared to Venturi Fluidization Mode (VFM). Experiment and simulation under cold condition was proceeded. From the test, flow field along axis and in cross-sections for SCFM are uniform. Turbulent velocity fluctuation is violent. And particles concentration is high. SCFM has better flow effect than VFM. Uniformity increases with higher superficial velocity and more tangential swirl devices. Recommended tangential swirl devices number is between 3-6. SCFM technology has good foreground.

scholarly journals Study on the Technology Conditions of Flue Gas Desulfurization with Organic Solvent

2013 ◽  
Vol 1 (1) ◽  
pp. 18-26
Author(s):  
Wanren Chen ◽  
Hua Li ◽  
Xiaoshuang Chen
Keyword(s):  
Organic Solvent ◽  
Flue Gas ◽  
Gas Flow ◽  
Room Temperature ◽  
Flue Gas Desulfurization ◽  
Desulfurization Efficiency ◽  
Time Of Operation ◽  
So2 Concentration

The technology experiment on Flue Gas Desulfurization (FDG) by DMSO method is studied in this paper, and the desulfurization efficiency is set out in various conditions. The results show that the desulfurization efficiency can be over 94% under the condition as follows: the rate of flow of DMSO=100 L/h, L/G＝40～50, absorbent concentration = 100 %DMSO, T=room temperature, the gas flow=60 ml∙min-1, inlet SO2 concentration= 0.1-0.5 %, the time of operation must be controlled in 30 minutes.

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