Explosion propagation in a dust removal pipeline under dust collector explosion

2021 ◽  
pp. 104662
Author(s):  
Lei Pang ◽  
Jiaojiao Cao ◽  
Qiuping Xiao ◽  
Kai Yang ◽  
Long Shi
Keyword(s):  
Dust Removal ◽  
Dust Collector

scholarly journals Experimental study on production and emission characteristics of PM2.5 from industrial fluidized bed boilers

2020 ◽  
Vol 24 (5 Part A) ◽  
pp. 2665-2675
Author(s):  
Songsong Zhang ◽  
Qian Du ◽  
Guoli Qi
Keyword(s):  
Fluidized Bed ◽  
Removal Efficiency ◽  
Mass Concentration ◽  
Great Influence ◽  
Chemical Properties ◽  
Dust Removal ◽  
Dust Collector ◽  
Bag Filter ◽  
Physical And Chemical ◽  
Fluidized Bed Boilers

Particle size distributions, concentrations, morphological characteristics, and elemental compositions of eight fluidized bed boilers with different capacities and different dust collectors were determined experimentally. The PM2.5 particle concentration and mass concentration were monitored in real-time before and after the boiler dust collector by electric low pressure impactor, and the physical and chemical properties of PM2.5 were analyzed by membrane sampling. We found that the PM2.5 particle concentration produced by industrial fluidized bed boilers displayed bimodal distributions, peaking at 0.2 ?m and 0.76 ?m, the formed mechanism of these two parts particles is vaporization-condensation of mineral matter and residual ash particles and the adsorbent wear or tear. Mass concentration exhibits a single peak characteristic with a peak at 0.12 ?m. The removal efficiency for PM2.5 of dust collectors varies with different dust removal mechanisms. The electrostatic precipitator and bag filter have high dust removal efficiency, and the water film dust collector has low dust removal efficiency. The normal operation of the bag filter has a great influence on the dust removal efficiency. The physical and chemical properties of PM2.5 showed that the single-particle morphology was mainly composed of irregular particles, containing a small amount of solid spherical particles and more agglomerates. The content of Si and Al in PM2.5 elemental analysis is the highest, which decreases after a dust collector. Some fluidized bed boilers use desulfurization in the furnace, which has great influence on the mass concentration of Ca and S elements, and the lowest Hg content in trace elements, about a few ppm. <br><br><font color="red"><b> This article has been corrected. Link to the correction <u><a href="http://dx.doi.org/10.2298/TSCI200901242E">10.2298/TSCI200901242E</a><u></b></font>

Study on a Photovoltaic Lunar Dust Removal System Based on the Photovoltaic Effect of PLZT

2017 ◽  
Author(s):  
Jing Jiang ◽  
Hong-Yue Zhao ◽  
Jin-Cheng Ding ◽  
Hong-Hao Yue ◽  
Xu-Yan Hou
Keyword(s):  
Ultraviolet Light ◽  
Removal Efficiency ◽  
Electrostatic Force ◽  
Photovoltaic Effect ◽  
Dust Removal ◽  
Dust Collector ◽  
Optical Elements ◽  
Lunar Dust ◽  
Protected Surface ◽  
Removal System

The deposition of lunar dust on the surface of solar panels and optical elements is one of the most important problems need to be solved in lunar exploration. This paper will propose an initiative lunar dust removal system based on the photovoltaic effect of PbLaZrTi (PLZT), which is activated by the ultraviolet light extracted from sun light at the lunar surface. When ultraviolet light with a wavelength near 365nm illuminates on polarized PLZT materials, high voltages of several kilovolt per centimeter can be generated between two electrodes of PLZT. When two electrodes of PLZT are connected to a lunar dust collector (LDC) and the ITO film of protected surface respectively, an electrostatic field forms between LDC and the protected surface. Coulomb forces over particles will overcome gravitational force and surface forces, so the particles can be absorbed to LDC and removed by LDC finally. Based on the equivalent electrical model, mathematical model of electrostatic force is derived when the lunar removal electric field is acted either by single piece PLZT or by multi-pieces PLZT which are connected in parallel. Experimental platform is set up to prove the feasibility of this lunar dust removal system. In order to improve the removal efficiency, a novel configuration design of LDC based on multi-PLZT patched is proposed and its removal efficiency is evaluated by experiments.

scholarly journals Design and Optimum of Dust Collector with Corrugated Plate for Underground Mine

2018 ◽  
Vol 2018 ◽  
pp. 1-5
Author(s):  
Ming Li ◽  
Chao Wu ◽  
Zhi-yong Zhou ◽  
Wei-chun Lian ◽  
Zhi-xiong Chen
Keyword(s):  
Removal Efficiency ◽  
Three Dimensional ◽  
Surface Characteristics ◽  
Dust Removal ◽  
Dust Collector ◽  
Dust Collection ◽  
Ansys Fluent ◽  
Metal Mine ◽  
Lead Zinc ◽  
Dimensional Simulation

A set of dust collectors was designed with corrugated plate for an underground metal mine, which has low ventilation resistance, simple maintenance, and strong environmental adaptability. A three-dimensional simulation model was built based on ANSYS-Fluent software, and it was used to analyze the influence law of key parameters on the comprehensive dust removal efficiency; the angle of corrugated plate to the horizontal plane, the surface characteristics of plate, pressure loss and dust removal efficiency were discussed. The optimal design scheme of the dust collector was determined according to the simulation results. The dust collection was carried out in the Fankou lead-zinc underground metal mine in China, and the total dust removal efficiency was more than 95%, and for respiratory dust, it was more than 85%. This dust collector can be widely used in similar underground metal mines.

scholarly journals Analysis on the Development Status of Coal Mine Dust Disaster Prevention Technology in China

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Hui Zhang ◽  
Weihai Han ◽  
Youlin Xu ◽  
Zhenfeng Wang
Keyword(s):  
Coal Mine ◽  
Prevention And Control ◽  
Occupational Diseases ◽  
Coal Mines ◽  
Control Measures ◽  
Dust Removal ◽  
Dust Collector ◽  
Mine Dust ◽  
Mining Face ◽  
And Control

In recent years, with the increasing level of mechanization, automation, and intelligence in mine mining, dust pollution in the working environment of coal mines has become increasingly serious. Coal mine dust prevention is an important work related to the life, health, and production safety of miners, and it is also one of the technical problems of mine safety in production. With the continuous revision and improvement of China′s Occupational Disease Prevention and Control Law, coal mining enterprises have generally strengthened the publicity, prevention, and control of occupational diseases among employees, and the control of coal mine dust has been used as a means for enterprises to improve the production environment and strengthen the occupational health of employees. Key work-based studies have shown that China’s coal mines have formed a theoretical system and technology system of dust prevention and control. In the future, China’s coal mines will start from intelligent dust prevention, achieve high-precision dust sensing-transmission-assessment and early warning, and develop a combined dust collector that integrates the functions of atomization dust removal, miniaturization, dry and wet mixing, and large air suction capacity. The combined dust collector realizes the efficient ventilation control and dust removal of the fine dust in wide-area complex spaces such as fully mechanized mining face and fully mechanized mining face. At the same time, breakthroughs have been achieved in low-permeability coal seams, such as strong hydraulic permeability-enhancing technology, intelligent dust-proof robots, and chemical dust suppression. This article introduces the basic concepts, generation, distribution, and hazards of coal mine dust and analyzes the characteristics, applicable conditions, and use effects of various dust control measures such as ventilation dust removal and wet dust removal. Moreover, this article also proposes specific prevention and control measures for related occupational diseases and discusses the development trend of dust prevention and control technology in the hope of providing guidance and reference for coal mine dust prevention and control.

Study of integrated vortex ventilation and dust removal system in mechanized excavation face

2020 ◽  
pp. 095440892093679
Author(s):  
Xiaofei Liu ◽  
Jifa Qian ◽  
Enyuan Wang ◽  
Zhenguo Zhang
Keyword(s):  
Numerical Simulation ◽  
Field Experiments ◽  
Dust Control ◽  
Dust Removal ◽  
Mine Safety ◽  
Respirable Dust ◽  
Dust Collector ◽  
Mining Operations ◽  
Swirling Jet ◽  
Removal System

The aerosolized dust produced during coal mining operations pollutes underground air environment and increases the risk of lung diseases in coal miners, such as pneumoconiosis. Aiming to solve the dust pollution in mechanized excavation face, the integrated vortex ventilation and dust removal system is designed based on swirling jet flow theory. The design principles and technological parameters of the major components of integrated vortex ventilation and dust removal (IVVDR) system, namely vortex ventilation device and wet dust collector are described systematically. Through numerical simulation and field experiments, the dust control and dust removal effects of IVVDR system were analyzed and tested. The numerical simulation results show that the swirling jet flows produced by wall-attached duct can control most of total and respirable dust in the area between working face and exhausting air outlet. In addition, the IVVDR system provides better control and removal effect of smaller respirable dust. In field application, the IVVDR system has better performance compared with the long-compression short-suction (LCSS) ventilation. In conclusion, the concentration of total and respirable dust in purified air are below 10 mg/m3, and in accordance with the mine safety regulations.

scholarly journals Application and Research of Swirling Curtain Dust Collection Technology in Mines

2020 ◽  
Vol 10 (6) ◽  
pp. 2005 ◽  
Author(s):  
Gang Li ◽  
Jinhua Hu ◽  
Xiaoli Hao ◽  
Huaidi Qu
Keyword(s):  
Health And Safety ◽  
Dust Removal ◽  
Water Volume ◽  
Dust Collector ◽  
Potential Hazard ◽  
Dust Collection ◽  
Metal Mine ◽  
Transfer Station ◽  
Air Speed ◽  
Low Efficiency

During the production process in mines, large amounts of dusts are produced. The dusts pose a potential hazard to the health and safety of miners. Traditional dust removal methods, such as ventilation, water sprays and foam technology, cannot completely solve the problem of dust pollution, due to low efficiency or high consumption of water or large resistance (>2000 Pa). Therefore, a swirling curtain dust collector (SCDC) was proposed to collect the dust in mines. The device was combined swirling atomization with spray curtain for dust removal. The performance of SCDC was investigated. According to the results, the optimum working condition of the device was: air pressure: 0.35 MPa, water volume: 30 L/h; liquid–gas ratio: 0.15 L/m3; air speed: 14–16 m/s. Under these operation parameters, the suppression efficiency of total dust and respirable dust were over 99.8% and 97%. The proposed device was applied at transfer stations of Luohe Metal Mine in Anhui, China. The application results showed that the dust concentration at the outlet of SCDC in the transfer station is lower than 20 mg/m3, which is stipulated by Chinese standard GB 28661-2012. The proposed device is expected to replace the traditional Venturi wet scrubber in mines.

STUDY ON EXPERIMENTAL MODEL TO DETERMINE THE EFFICIENCY OF DUST REMOVAL EQUIPMENT FOR MECHANIC WORKSHOP

2010 ◽  
Vol 13 (3) ◽  
pp. 67-75
Author(s):  
Thang Xuan Dinh ◽  
Trung Thanh Nguyen
Keyword(s):  
Removal Efficiency ◽  
Research Result ◽  
Suitable Method ◽  
Dust Removal ◽  
Small Scale ◽  
Dust Collector ◽  
Particle Removal ◽  
Wet Scrubber ◽  
Cleaning Methods ◽  
Removal Technique

Finding suitable method for selecting the most suitable dust collector for manufacturers is a very important practise which help to reduce environmental pollution and develop a stable society. Based on available research results, the article studies the efficiency of dust removal technique for medium and small scale workshops on three equipments: wet scrubber, wet packed scrubber and centriscrub to suggest suitable dust treatment process in factories as well as the present need. The research result on three equipments suggest that the wet packed scrubber has a minimum particle removal efficiency of 92,67% while the wet scrubber achieving removal efficiency of 81,85% and the Centriscrub achieving removal efficiency up to 99,50%. The results show that the wet cleaning methods is the most suitable method for safe and efficient collection of dusts from various metal working applications such as deburring, polishing and grinding workshop in which the centriscrub achieves the highest efficiency.

scholarly journals Efficiency characteristic of electrostatic dust precipitation using solar energy

2020 ◽  
Vol 24 (5 Part A) ◽  
pp. 2857-2864
Author(s):  
Lin Xu ◽  
Haoyuan Shi ◽  
Lu Wang ◽  
Wenjing Xiao ◽  
Qiong Li ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Electrostatic Precipitator ◽  
Great Influence ◽  
Dust Removal ◽  
Dust Collector ◽  
Solar Photovoltaic ◽  
Electrode Structure ◽  
Cloudy Weather ◽  
Removal Technology ◽  
Dust Precipitator

In this paper, solar photovoltaic technology and electrostatic dust removal technology are combined to design a solar electrostatic precipitator, and its operation effect and dust removal performance are studied. Starting from optimizing the structure of the dust precipitator, the electrode structure of the dust precipitator was improved, the area of dust collector per unit volume was increased, and the dust removal efficiency was improved. By changing different working conditions, different solubility, different voltage, and different dust removal efficiency. Finally, compared the dust removal efficiency of the finned tubular and snowflake dust precipitator. The results show that the snowflake dust precipitator works stably in sunny and cloudy weather, and the dust removal effect is the highest, followed by dry powder, and the cement dust removal effect is the worst. It is determined that the change of voltage within the set range has little influence on the dust removal efficiency, and the dust concentration has a great influence on the dust removal efficiency.

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