Urease producing microorganisms for coal dust suppression isolated from coal: Characterization and comparative study

2020 ◽  
Vol 31 (9) ◽  
pp. 4095-4106
Author(s):  
Yijin Fan ◽  
Xiangming Hu ◽  
Yanyun Zhao ◽  
Mingyue Wu ◽  
Shumin Wang ◽  
...  
Keyword(s):  
Comparative Study ◽  
Coal Dust ◽  
Dust Suppression ◽  
Coal Characterization

scholarly journals Development of Environmental Friendly Dust Suppressant Based on the Modification of Soybean Protein Isolate

Processes ◽  
2019 ◽  
Vol 7 (3) ◽  
pp. 165 ◽  
Author(s):  
Hu Jin ◽  
Wen Nie ◽  
Yansong Zhang ◽  
Hongkun Wang ◽  
Haihan Zhang ◽  
...  
Keyword(s):  
Water Retention ◽  
Soybean Protein ◽  
Coal Dust ◽  
Sodium Dodecyl ◽  
Environmentally Friendly ◽  
Protein Isolate ◽  
Dust Particles ◽  
Dust Suppression ◽  
Soybean Protein Isolate ◽  
Coal Particles

Aiming to further improve the dust suppression performance of the dust suppressant, the present study independently develops a new type of biodegradable environmentally-friendly dust suppressant. Specifically, the naturally occurring biodegradable soybean protein isolate (SPI) is selected as the main material, which is subject to an anionic surfactant, i.e., sodium dodecyl sulfonate (SDS) for modification with the presence of additives including carboxymethylcellulose sodium and methanesiliconic acid sodium. As a result, the SDS-SPI cementing dust suppressant is produced. The present study experimentally tests solutions with eight different dust suppressant concentrations under the same experimental condition, so as to evaluate their dust suppression performances. Key metrics considered include water retention capability, cementing power and dust suppression efficiency. The optimal concentration of dust suppressant solution is determined by collectively comparing these metrics. The experiments indicate that the optimal dust suppressant concentration is 3%, at which level the newly developed environmentally-friendly dust suppressant solution exhibits a decent dust suppression characteristic, with the water retention power reaching its peak level, and the corresponding viscosity being 12.96 mPa·s. This performance can generally meet the requirements imposed by coal mines. The peak efficiency of dust suppression can reach 92.13%. Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were used to analyze the dust suppression mechanism of the developed dust suppressant. It was observed that a dense hardened shell formed on the surface of the pulverized coal particles sprayed with the dust suppressant. There is strong cementation between coal dust particles, and the cementation effect is better. This can effectively inhibit the re-entrainment of coal dust and reduce environmental pollution.

Comparison of the coal dust suppression performance of surfactants using static test and dynamic test

2021 ◽  
pp. 129633
Author(s):  
Zidong Zhao ◽  
Ping Chang ◽  
Guang Xu ◽  
Apurna Ghosh ◽  
Danqi Li ◽  
...  
Keyword(s):  
Coal Dust ◽  
Dynamic Test ◽  
Dust Suppression ◽  
Static Test

scholarly journals Experimental Research on Optimization and Coal Dust Suppression Performance of Magnetized Surfactant Solution

2011 ◽  
Vol 26 ◽  
pp. 1314-1321 ◽  
Author(s):  
Ding Cui ◽  
Nie Baisheng ◽  
Yang Hua ◽  
Dai Linchao ◽  
Zhao Caihong ◽  
...  
Keyword(s):  
Experimental Research ◽  
Coal Dust ◽  
Surfactant Solution ◽  
Dust Suppression

Preparation of microbial dust suppressant and its application in coal dust suppression

2021 ◽  
Author(s):  
Chunyu Song ◽  
Yanyun Zhao ◽  
Weimin Cheng ◽  
Xiangming Hu ◽  
Shucang Zhu ◽  
...  
Keyword(s):  
Coal Dust ◽  
Dust Suppression

scholarly journals Mine aerology of dust aerosols under conditions of hydro-vortex coagulation

2020 ◽  
pp. 155-165
Author(s):  
Nikolay Petrovich KOSAREV ◽  
◽  
Vladimir Nikolaevich MAKAROV ◽  
Aleksandr Vladimirovich UGOL'NIKOV ◽  
Nikolay Vladimirovich MAKAROV ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Aerodynamic Drag ◽  
Coal Dust ◽  
Aerodynamic Resistance ◽  
Experimental Studies ◽  
Similarity Criteria ◽  
Dust Suppression ◽  
Dust Aerosols ◽  
Wide Range ◽  
Mine Workings

Dust suppression is the most popular method for depositing dust from the air to blast isolation. Improving the isolation system for probable coal dust explosions is an integral part of the problem of dust explosion protection of mining enterprises, the solution of which is one of the most important tasks in the field of occupational safety and health. Purpose: study of physics of the process and the construction of a mathematical model of the movement of aerosols in mine workings in a wide range of changes in the inertial kinematic parameters of the air flow. Research methods. Based on the Boussinesq equation, the Fourier rule and the similarity theorem of complex systems, the analogy of vorticity dispersion and kinematic viscosity, a mathematical model of the movement of dust aerosols under hydro-vortex coagulation conditions is constructed. Some similarity criteria are obtained that ensure the identity of experimental studies and real aerological processes in mines, as well as criterion equations for calculating the coefficient of aerodynamic drag and the time of unsteady inertial motion. Results. Equations are obtained that make it possible to identify aerodynamic processes of aerosol motion under hydro-cyclonic dust suppression through the criteria of Reynolds, Euler and Archimedes, corresponding to the overStokes and Stokes flow regimes. The possibility of reducing the aerodynamic resistance to 20% during hydro-vortex coagulation has been confirmed, which makes it possible to increase the energy efficiency of dust suppression by up to 15% and to increase the turbulization coefficient by at least 20%, thereby reducing the likelihood of a hazardous concentration of dust aerosols. Application. The use of the proposed mathematical model will make it possible to better calculate local aerological processes in mine workings and, as a consequence, to increase the efficiency of turbulization and dust suppression process control at mining enterprises.

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