scholarly journals Testing of a fume and dust extraction system as mitigation for aerosol generating procedures in a dental surgery

2021 ◽  
Author(s):  
J Allerton ◽  
J Tompkins ◽  
F Matsakas ◽  
D Butterfield ◽  
A Brown ◽  
...  
Keyword(s):  
Extraction System ◽  
Dust Extraction ◽  
Dental Surgery

scholarly journals Influence of Exhaust System Setup on Working Zone Pollution by Dust during Sawing of Particleboards

2020 ◽  
Vol 17 (10) ◽  
pp. 3626 ◽  
Author(s):  
Bartosz Pałubicki ◽  
Luďka Hlásková ◽  
Tomasz Rogoziński
Keyword(s):  
Air Pollution ◽  
Exhaust System ◽  
High Impact ◽  
Dust Concentration ◽  
Dust Particles ◽  
Extraction System ◽  
Wood Dust ◽  
Dust Extraction ◽  
Working Zone ◽  
Machine Work

Air pollution by wood dust in furniture production sites is an important hygiene issue. The dust is created by all types of wood and wood-based material machining, and its concentration in the working zone surrounding the machining stand depends on the effectiveness of the dust exhaust system. In present research, three setups of the dust extraction system for a conventional table sawing machine are considered while machining particleboards. The results showed a high impact of the exhaust system connection setup on the dust concentration in the air surrounding the sawing machine work stand. The use of both main and auxiliary sawdust extraction connectors together ensured the highest clearness of the air, with only 0.5 mg/m3 of dust concentration. Closing the upper hood leads to a concentration five times higher, while disconnecting it results in a ten times higher dust content. The finest dust particles (<1 µm), however, are the most numerous in the case of closing the hood.

Use of Computer Simulation in the Selection of Operating Parameters for the Dust Extractor Built into the Roadheaders

2021 ◽  
pp. 21-27
Author(s):  
S.S. Kobylkin ◽  
◽  
A.N. Timchenko ◽  
A.S. Kobylkin ◽  
Keyword(s):  
Artificial Intelligence ◽  
Computer Modeling ◽  
Ventilation System ◽  
Coal Mines ◽  
Extraction System ◽  
Maximum Efficiency ◽  
Operating Parameters ◽  
Joint Operation ◽  
Mining Operations ◽  
Dust Extraction

An increase in the rate of mine workings excavation leads to the ingress of large amount of dust into the mine atmosphere. Ensuring the aerological safety of coal mines drifting faces according to the dust factor is an urgent task. To reduce the level of dustiness of a dead mine roadheading during its sinking, the scrubbers built into the roadheader are used. In this case, the joint operation of the ventilation system and the dust extraction system is not considered. This leads to the risk of occurrence of the stagnation zones or air recirculation near the bottom-hole area. At the intensive ventilation with a high air flow, the dust is removed, and the dust extraction system becomes useless. As the analysis showed, currently there are no methods that allow to take into account these two processes simultaneously. The idea of using computer modeling in the Ansys software package is proposed. To correctly solve the problems of optimizing the scrubber operation, a method is given for determining the grid parameters, as well as for setting the initial and boundary conditions. All the data obtained were verified at the coal mines of Russia. To achieve maximum efficiency, it is proposed to use the dust and aerodynamic criteria of the scrubber operation, which will allow to increase the mining operations safety. The dust criterion characterizes the efficiency of the dust extraction systems. The aerodynamic criterion allows to determine the joint operation mode in which there will be no recirculation and not ventilated zones. To take into account the large number of factors that affect the ventilation of a dead mine working and the operation of the dust extraction system, an artificial intelligence was added to computer modeling in system design. It is implemented in the ANSYS DesignXplorer module. In a given range of changing factors during the operation of artificial intelligence, by performing multiple calculations, such a combination of operating parameters of the two systems is obtained, at which the efficiency is maximum.

Features of the use of the drug etoricoxib in the planning of dental surgery

2020 ◽  
Vol 1 (12) ◽  
pp. 51-53
Author(s):  
A. V. Gvozdev ◽  
A. M. Panin ◽  
N. E. Kushlinsky ◽  
L. R. Fahrislamova ◽  
A. M. Tsitsiashvili
Keyword(s):  
Correlation Analysis ◽  
Third Molars ◽  
Dental Surgery

An assessment and correlation analysis was performed between the main indicators when using the drug etoricoxib for the removal of third molars.

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