Development of an Integrated Dust Collector and Local Exhaust Ventilation System for Controlling Industrial Mine Dust

2013 ◽  
Vol 824 ◽  
pp. 217-224
Author(s):  
E.O. Ifelola ◽  
D.J. Afu
Keyword(s):  
Material Selection ◽  
Ventilation System ◽  
Dust Control ◽  
Dust Collector ◽  
Cleaning Efficiency ◽  
Successful Operation ◽  
Airborne Dust ◽  
Local Exhaust Ventilation ◽  
Mine Environment ◽  
Fan Speed

Dust control in an enclosed mine environment is a fundamental key to personnel safety for boosting personnel productivity and enhancing successful operation, hence the need to design a dust control equipment to meet this crucial requirement. A laboratory-scale local exhaust ventilating system for the control of airborne dust in an enclosed mine environment was designed and fabricated. The design was carried out by considering various design criteria required for a well-ventilated enclosed mine environment. Material selection of the components was done by taking into cognisance the physical characteristics of the targeted dust. The system designed was fabricated and then test-ran with dry dust laden air stream in order to determine its cleaning efficiency with respect to variation in fan speed and dust grain size. It was observed that the cleaning efficiency of the machine was high at a higher fan speed and low grain sizes. The cleaning efficiency ranged from (63.9-44.0)% for dust particle sizes ranging from (62.5-125) to (1000-2000) μm with a mean fan suction of 0.958Pa. Thus, with this system, improved cleaning of dry dust-laden enclosed mine workplace could be achieved with increased rate of suction of smaller particle-sized dust.

Localized Electrostatic Precipitation as an Alternative to Exhaust Ventilation for Controlling Airborne Dust in Textile Workplaces

1988 ◽  
Vol 58 (11) ◽  
pp. 619-625 ◽  
Author(s):  
A. M. Johnston ◽  
G. W. Hughson ◽  
J. H. Vincent ◽  
A. D. Jones
Keyword(s):  
Pilot Trial ◽  
Cost Effective ◽  
Dust Control ◽  
Experimental Chamber ◽  
Electrostatic Precipitation ◽  
Airborne Dust ◽  
Local Exhaust Ventilation ◽  
Exhaust Ventilation ◽  
Control Cabinet ◽  
Textile Factory

We report the results of a series of investigations to assess the possible use of localized electrostatic precipitation as a practical, cost-effective alternative to local exhaust ventilation for control of airborne dust levels in the workplace. A brief summary is given of work in the laboratory using both an experimental chamber and a dust control cabinet fitted to a textile winding rig. These studies have been extended to include a pilot trial on an open-bed spinning frame in an asbestos textile factory. A detailed account of the procedures and results of this latter study is given. The possible advantages of electrostatically based systems in terms of cost-efficiency are considered against possible disadvantages associated with operational accessibility.

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.

Air Flow Straighteners’ Application to Reduce the Power Consumption of Exhaust Ventilation Schemes

2018 ◽  
Vol 875 ◽  
pp. 137-140 ◽  
Author(s):  
Valery N. Azarov ◽  
Natalia M. Sergina ◽  
I.V. Stefanenko
Keyword(s):  
Power Consumption ◽  
Air Flow ◽  
Ventilation System ◽  
Aerodynamic Resistance ◽  
Experimental Studies ◽  
Swirling Flows ◽  
Dust Collector ◽  
Exhaust Ventilation ◽  
Outlet Pipe ◽  
Ventilation Systems

It was proposed to use air flow screw straightened units in outlet pipe of the dust collectors to reduce the aerodynamic resistance of exhaust ventilation systems. It is allowed to decrease power consumption for their maintenance operation consequently. The article describes the results of experimental studies to evaluate its effectiveness by applying the tangential screw straightened unit within ventilation system. The obtained results showed that the use of this device allows reducing the aerodynamic resistance of the cyclone by 14.6%, and for counter-swirling flows’ dust collector (CSFC) by 17.2-23.6%. It was found that meanings of the aerodynamic resistance depend on value the share proportion of the flow entering into lower CSFC apparatus’ input.

Performance of Different Front-Opening Unified Pod (FOUP) Moisture Removal Techniques With Local Exhaust Ventilation System

2020 ◽  
Vol 33 (2) ◽  
pp. 310-315 ◽  
Author(s):  
Tee Lin ◽  
Omid Ali Zargar ◽  
Oscar Juina ◽  
Tzu-Chieh Lee ◽  
Dexter Lyndon Sabusap ◽  
...  
Keyword(s):  
Ventilation System ◽  
Moisture Removal ◽  
Local Exhaust Ventilation ◽  
Exhaust Ventilation

scholarly journals Effects of molasses, polyacrylamide and bentonite on dust control in forest roads

2020 ◽  
Vol 66 (No. 5) ◽  
pp. 218-225
Author(s):  
Aidin Parsakhoo ◽  
Seyed Ataollah Hosseini ◽  
Majid Lotfalian ◽  
Jahangir Mohammadi ◽  
Meysam Salarijazi
Keyword(s):  
Dust Emission ◽  
Road Surface ◽  
Dust Control ◽  
Dust Collector ◽  
Forest Road ◽  
The Road ◽  
Rainfall Occurrence ◽  
Spray System ◽  
Fine Aggregates ◽  
Reduction Efficiency

In this study, some environmentally friendly anti-dust agents including sugar cane molasses, polyacrylamide and bentonite were used to control dust emission from the forest road surface within the 3, 9, 27 and 81-day timeframe. A rear-mounted spray system and dust collector devices were used for implementation of treatments and dust emission recording, respectively. The results showed that emitted dust tended to decrease with the increase of anti-dust agent concentrations. Moreover, the emitted dust started to decrease with time, with minimum reduction efficiency at the end of the 81st day. More than half of road surface aggregates had the size smaller than 10 µm that were aggregated by the application of molasses and polyacrylamide. The size of 70% of the road surface fines increased to more than <br />50 µm. Bentonite affected negatively road surface materials and caused fine aggregates to increase. It is concluded that the amount of fine aggregates in surfacing materials, rainfall occurrence, and type and dosage of anti-dust agents play an important role in the effectiveness and longevity of treatment

Comprehensive Control of 7-Amino-Cephalsporanic Acid Dust in Drying Workshop

2014 ◽  
Vol 522-524 ◽  
pp. 481-484
Author(s):  
Jin Feng Zhang ◽  
Xin Liu ◽  
Li Min Hou ◽  
Qin Liu
Keyword(s):  
Adverse Effects ◽  
Production Process ◽  
Ventilation System ◽  
Dust Control ◽  
Control Measures ◽  
Explosion Hazard ◽  
Work Safety ◽  
Process Technology ◽  
Dust Generation ◽  
Pharmaceutical Enterprise

7-amino-cephalsporanic acid (7-ACA) is the key intermediate of cephalosporin, which has a strong sensitization and explosion hazard. So it seriously affects the worker’s health in the workshop, the environment safety out of the workshop and work safety. The drying workshop of 7-ACA at a pharmaceutical enterprise in Shijiazhuang is investigated and the production process is analyzed, the key places of dust leakage and the causes of dust generation are identified. Combined with the pollution and safety risk in drying workshop, the targeted control measures are taken from the process technology, ventilation system and dust collecting device, which effectively removed the adverse effects from 7-ACA leaking. The study provides a reference for the dust control in similar enterprises.

Experimental and Simulation Validation Methods of Local Exhaust Ventilation (LEV) in Training Facilities Building

2013 ◽  
Vol 315 ◽  
pp. 997-1001 ◽  
Author(s):  
Ng Chee Seng ◽  
Abdul Mutalib Leman ◽  
Azmahani Sadikin
Keyword(s):  
Indoor Air ◽  
Ventilation System ◽  
Percentage Error ◽  
Local Exhaust Ventilation ◽  
Geometry Model ◽  
Exhaust Ventilation ◽  
Simulation Validation ◽  
Air Ventilation ◽  
Computational Fluid Dynamics Cfd ◽  
Real Flow

LEV is a ventilation system that collects and sucks out particles such as dusts, mists, gases, vapors or fumes out of work station, so that they can’t be breathed in by occupants. There is a lot of LEV allocated and installed in order to help protecting occupants’ health but it doesn’t work properly. To overcome this issue, computational fluid dynamics (CFD) will be implemented. Past studies CFD techniques represent a very significant improvement of air ventilation systems. However, CFD is just a tool in prediction model, which can lead to inaccuracy of predicting airflow due to problems with pre-processing, solver and post-processing with parameter from actual experimental results. As of yet, it is not possible to 100% accurately simulate airflow around a body. These codes are simply models which are close to that of a real flow, but not an exact match. All of these require validation to help minimizing percentage error in CFD methodology. Several strategies are needed to boost effectiveness of LEV in terms of predicting airflow in a geometry model. The outcome of this research can be used as a benchmark or guideline for industries to help improving indoor air quality (IAQ).

METHOD OF SELECTION AND CALCULATION DEVICES AIR CLEANING FROM CONDENSED AEROSOLS

2016 ◽  
Vol 6 (2) ◽  
pp. 14-18
Author(s):  
Denis N. VATUZOV ◽  
Svetlana M. PURING
Keyword(s):  
Energy Efficiency ◽  
Ventilation System ◽  
Design Parameters ◽  
Local Exhaust Ventilation ◽  
Improve Energy Efficiency ◽  
Air Cleaning ◽  
Exhaust Ventilation ◽  
Recovery System ◽  
Degree Of Purification ◽  
Ventilation Management

This article defines the options to improve the efficiency of local exhaust ventilation systems by incorporating into the circuit from the air cleaning devices droplet aerosol. Schemes connecting cleaning apparatus in ventilation management system are worked out. In the first embodiment, the placement aerozoleulovitelya purified ventilation air is discharged directly to the atmosphere, in the second embodiment, the cleaned air is used in the recovery system, which is removed after the street. The feasibility of using the heat exchanger in the scheme is justified by comparing the technical and economic options and the need to improve energy efficiency. The method of selection and calculation of air cleaning devices from droplet sprays, on the basis of which it is possible to determine the design parameters of the system, to evaluate the amount of captured material, and choose the most appropriate in each case unit, focusing on the desired performance of the ventilation system, the necessary degree of purification and the area for mounting the device.

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