Investigation of the dust control performance of a new transverse-flow air curtain soft-sealing system

2020 ◽  
Vol 362 ◽  
pp. 238-245
Author(s):  
Di Xiao ◽  
Xiaochuan Li ◽  
Zhenchang Fang ◽  
Weidong Yan ◽  
Yefeng Jiang ◽  
...  
Keyword(s):  
Transverse Flow ◽  
Dust Control ◽  
Control Performance ◽  
Air Curtain

scholarly journals CFD-Based Determination of the Optimal Blowing and Suction Air Volume Ratio of Dual-Radial Swirl Shielding Ventilation in a Fully Mechanized Excavation Face

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Kuan Wu ◽  
Shiliang Shi ◽  
Yijie Shi ◽  
Yong Chen
Keyword(s):  
Ventilation System ◽  
Volume Ratio ◽  
Simulation Method ◽  
Dust Concentration ◽  
Dust Control ◽  
Underground Mines ◽  
Physical And Mental Health ◽  
Control Effect ◽  
Air Curtain ◽  
Air Volume

Dust is one of the main pollutants in coal mines, which seriously affects the physical and mental health of workers, as well as the safe production in underground mines. Dual-radial swirl shielding ventilation is a new ventilation method for a fully mechanized excavation face and can effectively reduce the dust concentration in the underground. The dust control effect of dual-radial swirl shielding ventilation is mainly affected by the thickness and integrity of the shielding air curtain, as well as the disturbance of the flow field near the air curtain. By changing the blowing and suction air volume ratio of the air duct, the strength of the radial air curtain can be improved, and the dust control effect of the dual-radial swirl shielding ventilation system can be effectively improved. In order to determine the optimal operating parameters of the dual-radial swirl shielding ventilation system, a numerical simulation method was used to conduct an in-depth study on the blowing and suction air volume ratio of the system. The results showed that when the blowing and suction air volume ratio of the air duct was 1.5, the radial air curtain had the highest strength. Under this condition, the dust concentration at the driver’s position of the roadheader was the lowest, and the dual-radial swirl shielding ventilation system can achieve an ideal dust control effect.

Numerical Simulation Study on Air-Flow Migration Law about Vortex Air Curtain of Plane Wall Fan Drum

2012 ◽  
Vol 241-244 ◽  
pp. 1285-1292
Author(s):  
Gang Zhou ◽  
Sen Cao ◽  
De Ming Wang ◽  
Wei Min Cheng ◽  
Wen Nie
Keyword(s):  
Numerical Simulation ◽  
Control System ◽  
Simple Algorithm ◽  
Plane Wall ◽  
Dust Control ◽  
High Concentration ◽  
Air Curtain ◽  
Working Face ◽  
Simulation Results ◽  
Migration Law

Vortex air curtain of plane wall fan drum can control the diffusion of air stripping dust effectively. In order to solve the high-concentration dust problem in fully mechanized excavation face, formation mechanism of vortex air curtain was analyzed. According to fluid mechanical control equations of gas phase flow, mathematical model was established to solve air migration law of vortex air curtain in fully mechanized excavation face. By using Simple algorithm based on collocated grid and fluent software, numerical simulation of air spatial migration law of closed-end dust control in fully mechanized excavation face was carried out. The simulation results show that vortex air curtain dust control system can form dust control fan drum along driving head to the front of the roadheader driver. According to the simulation results and actual conditions of working face field, vortex air curtain suction dust control system consisted of plane wall fan drum and exhausted dust purification device in fully mechanized excavation face was designed, and after it was applied in fully mechanized excavation face, the dust concentration decreased effectively in the working face field.

The Research and Application of Efficient Dust Control System for Whole-Rock Comprehensive Mechanization Driving Face

2014 ◽  
Vol 955-959 ◽  
pp. 1020-1023 ◽  
Author(s):  
Wen Nie ◽  
Nai Guo Wang ◽  
Wei Min Cheng ◽  
You Ying Ma ◽  
Ya Ru Sun
Keyword(s):  
Control System ◽  
Short Distance ◽  
Coal Dust ◽  
Dust Control ◽  
Respirable Dust ◽  
High Concentration ◽  
Air Curtain ◽  
Random Movement ◽  
Comprehensive Mechanization ◽  
Purification System

To prevent high concentration dust on whole-rock comprehensive mechanization driving face efficiently, air curtain dust drawing and purification system were developed. This system is consisted of two sections, air curtain dust drawing device and dust purification system device. It determines optimized parameters of air curtain drawing dust device by combining site actual conditions and has realized short distance 3d dust absorbing and random movement. After using the efficient dust control system for whole-rock comprehensive mechanization driving face on south main return way,the average dust-laying rate of total coal dust and respirable dust in manually operation department, respectively reach 91.6% and 90.5%.It shows that this system is a efficient means for dust control of whole-rock comprehensive mechanization driving face.

scholarly journals Development of a roof bolter canopy air curtain for respirable dust control

2017 ◽  
Vol 69 (1) ◽  
pp. 33-39 ◽  
Author(s):  
W.R. Reed ◽  
G.J. Joy ◽  
B. Kendall ◽  
A. Bailey ◽  
Y. Zheng
Keyword(s):  
Dust Control ◽  
Respirable Dust ◽  
Air Curtain ◽  
Roof Bolter ◽  
Canopy Air Curtain

Parameter Optimization and Numerical Simulation of Dust-Collecting and Dedusting System with Air Curtain in Heading Face

2011 ◽  
Vol 317-319 ◽  
pp. 2073-2078 ◽  
Author(s):  
Jian Zhuo Zhang ◽  
Tian Zi Zhu ◽  
Meng Gao ◽  
Kang Kang Li
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Dust Control ◽  
Critical Factors ◽  
Air Curtain ◽  
Wind Speeds ◽  
Outlet Pressure ◽  
New Type ◽  
Fan Speed ◽  
Optimal Efficiency

A new type of dust-collecting and dedusting system with air curtain was developed to solve the problems of the dust-prevention in mine tunnel. The speed of air-curtain fan, the structure size and pressure of dedusting duct are the critical factors, which effect dust control of the whole system. In order to achieve optimal efficiency of dust control, the simulation was conducted with FLUENT(computational fluid dynamics software) to analyse the air-curtain fan surface path lines and dust particle tracks at different wind speeds of air curtain fan, dedusting duct diameters and outlet pressures. We obtained the law of fan speed, the diameter and outlet pressure of dedusting duct, which effect the whole system on dedusting. This law would play a guiding role on the structural optimization of dust-collecting and dedusting system with air curtain.

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