International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 04 | Apr -2017
p-ISSN: 2395-0072
www.irjet.net
HAZARDOUS GAS DETECTION IN COAL MINES Sonali Bhaisare1, Kajal Bonde2, Viplav Moon3 ,Akash Hedau4 1ECE,
Student DBACER Nagpur, India ECE, Student DBACER Nagpur, India 3 ECE, Student DBACER Nagpur, India 3 ECE, Student DBACER Nagpur, India ---------------------------------------------------------------------***--------------------------------------------------------------------2
Abstract - In coal mines there square measure such a big
amount of venturous gases that square measure gift displaces the mandatory gas to support the human life, so it's necessary to develop such a technology to live the extent of the harmful gases therein atmosphere that facilitate U.S.A. to save lots of the lifetime of men that square measure operating in such atmosphere. Every device has its own advantage and operating. Some device square measure higher for sensing the gases and a few square measure uses for the ignitable gases detection. The paper enumerates the in operation principle, working, procedure and application of various varieties of harmful and ignitable gases in venturous areas.
3- Combustible liquid–produced vapors. 4- Flammable dusts and burnable fibers/flying.
1.2 Combustible gases The Combustible gases are the gases which will burn once mixed with gas and ignite. Typically, most combustion reactions involve the burning of organic materials containing carbon and gas .Combustion reactions are essential to life, and are exploited to come up with power, to supply heat to run motors and in several different ways that. Some flammable gases are: • Carbon oxide (CO),
Key Words: Gas device, applied science
• Hydrogen (H2), • Carbon oxide (CO2),
1. INTRODUCTION
• Methane (CH4),
In underground coal pit there are a unit powerful operating condition and unsafe setting attributable to that a lot of accidents and large loss of properties happens. These accidents have style of causes, explosive rise of gases like methane series, CO, dioxide, dioxide, oxygen, chemical element sulfide, chemical element owing to the presence of those entire gases short chemical element for coal pit employee to breadth. Thus so as for triple-crown growth of coal mining trade and for safety of employees it's necessary to develop technologies and realize the ways in which so as to form space dangerous free. To maintain the atmosphere within accurately the primary and for many steps is often observance the amount of gases. This essentially offers and rough plan to the relating to long and short term trending info and provides the first info or the warning against each dangerous areas wherever the miners ordinarily works. This warning prevents the manual laborer to travel to the risky areas alternatively safety is assured
1.1 Hazardous areas
• Water vapor (H2O)–from coal and water, air and/or gas
2. Abbreviations Toxic gases are harmful in lower ranges over an extended amount of your time and in higher ranges for shorter amount of your time. Totally different countries has its own TLVs i.e. threshold price limit for toxic gases so as to advance the employee protection. Units TLV of a chemical substance could be a level to that it's believed an employee may be exposed day when day for operating lifespan while not adverse effects. There are 3 varieties of TLVs 1-Time weighted average (TWA): TWA is employed to calculate a staff daily exposure to a dangerous substance or agent, averaged to associate degree 8hrs workday, taking into consideration the typical level of the substance or agent and therefore the time spent within the space. 2-Short term exposure limits (STEL):
Dangerous locations or the area unit as are the places wherever fireplace or explosion might exist due following reasons: 1- Flammable gases. 2- Inflammable liquid–produced vapors. © 2017, IRJET
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STEL is that the acceptable average exposure over a brief amount of your time typically quarter-hour as long because the time weighted average isn't exceeded. STEL could be a term utilized in activity health, industrial hygiene and pharmacology. 3- Ceiling Limit (CL):
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