A method for humidifying fine particles of coking coal: Agglomeration characteristics and dust dynamics analysis

Zhang, Ze; Zhang, Shuting

doi:10.1016/j.powtec.2021.09.013

Cited by 10 publications

(3 citation statements)

References 29 publications

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“…Equations and are the continuity equation and momentum equation of liquid phase, respectively. Equations and are the motion equation and torque equation of particles, respectively; eq is the normal contact force of the JKR contact model, which has been widely used to pipeline plugging and agglomeration evolution …”

Section: Numerical Simulation Methodsmentioning

confidence: 99%

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Dynamic Behavior Analysis of Wax Crystals during Crude Oil Gelation

Dong

Zhao

et al. 2023

ACS Omega

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The motion behaviors, rheological properties, and mechanical properties of a wax crystal mesoscale force chain network of waxy crude oil during gelation were experimentally studied and simulated by rheo-optic in situ measurement and computational fluid dynamics–discrete element method (CFD–DEM) numerical simulation, respectively. The motion behavior characteristics of wax crystals and the changes in the average coordination number of wax crystal networks were obtained at different temperatures. The study investigates the rule of crude oil rheological deterioration, the increase of wax crystals, and the changes in wax crystal motion behaviors with decreasing temperature. The relationship between the structure of the mesoscale force chain of the wax crystal network and the motion behaviors of the wax crystal and its rheological properties was analyzed. The results show that the average motion velocity of wax crystals or aggregates decreases from 28.48 to 22.56 μm/s when the temperature decreases from wax appearance temperature (48 °C) to 25 °C. The rotation and rolling trend of wax crystals gradually flatten, and the average coordination number increases 4.39 times. The viscosity of waxy crude oil increases from 6.27 to 8369.7 mPa·s, and the average coordination number of wax crystals obtained by CFD–DEM also increases significantly, which confirms the experimental results. We also found that when the system tended to gelation, a complex and stable force chain network was formed between the wax crystals, with a force chain coverage of 87.93% and a significant increase in the pressure drop in the flow field, which is consistent with the variation pattern of the system viscosity. The micro–meso-dynamic behavior analysis of waxy crude oil combined with CFD–DEM coupling provides a new way to explore the rheological properties of waxy crude oil and the microscopic mechanism of its modification.

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Section: Numerical Simulation Methodsmentioning

confidence: 99%

“…Equations 6 and 7 are the motion equation and torque equation of particles, 85 respectively; eq 8 is the normal contact force of the JKR contact model, which has been widely used to pipeline plugging 86 and agglomeration evolution. 87 …”

Section: Numerical Simulation Methodsmentioning

confidence: 99%

Dynamic Behavior Analysis of Wax Crystals during Crude Oil Gelation

Dong

Zhao

et al. 2023

ACS Omega

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“…Polymers 2023, 15, x FOR PEER REVIEW 3 of 15 2020, Li RH et al [26] sprayed chemical coagulant kappa carrageenan/Tween-80/NH4Cl (KC/TW/NH4Cl) into a turbulent coagulation chamber, and the particle diameter increased from 2.8 μm to 10.0 μm. In 2021, Zhang Z et al [27] achieved the coagulation of dust of less than 0.5 mm with the chemical coagulation method by humidifying and injecting soap during coking coal loading and unloading. In 2022, Zhou L et al [28] added sesbania gum (SBG) and styrene butadiene lotion (SBE) to an electrostatic precipitator, and the total dust removal efficiency increased from 89.45% to 91.05%.…”

Section: Experimental Facilitymentioning

confidence: 99%

Experimental Study on Humidification Coagulation and Removal of Fine Particles Using an Electrostatic Precipitator

et al. 2023

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A wet electrostatic precipitator (WESP) has much higher capture rate for fine particulate matter, PM2.5, than a traditional dry type electrostatic precipitator does. In order to make full use of existing dust removal equipment and reduce the emissions of smoke and dust to zero, a combination of chemical coagulation and humidification coagulation is proposed using a WESP. The results show that the addition of chemical coagulant can promote the coagulation of coal-fired dust particles. After the addition of pectin (PG), the median diameter of dust particles increases from 28.19 μm to 45.28 μm. Water vapor humidification can promote the coagulation of dust particles. When the water vapor injection rate increases from 0 kg/h to 3.2 kg/h, the median diameter of dust particles increases from 28.19 μm to 36.45 μm. The synergistic effect of the coagulant and water vapor can enhance the chemical coagulation effect; when 1.0 × 10−2 g/L PG and 3.2 kg/h water vapor synergize, the collection efficiency reaches 98.17%, and when 1.0 × 10−2 g/L polyacrylamide (PAM) and 3.2 kg/h water vapor synergize, the collection efficiency reaches 96.68%. Both chemical coagulation and water vapor humidification can promote the condensation of coal dust, which is beneficial to improve the efficient capture of fine particles using WESP.

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Investigation of the interaction of particulate matter and its separation from the gas flow in a multi-channel cyclone with recirculation

Chlebnikovas

Jasevičius

2022

Granular Matter

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A method for humidifying fine particles of coking coal: Agglomeration characteristics and dust dynamics analysis

Cited by 10 publications

References 29 publications

Dynamic Behavior Analysis of Wax Crystals during Crude Oil Gelation

Dynamic Behavior Analysis of Wax Crystals during Crude Oil Gelation

Experimental Study on Humidification Coagulation and Removal of Fine Particles Using an Electrostatic Precipitator

Investigation of the interaction of particulate matter and its separation from the gas flow in a multi-channel cyclone with recirculation

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