An automated water dispensing system for controlling fires in coal yards

Abstract

In spite of recent moves to wean the world of fossil fuels, coal remains the main source of power in many countries. Coal yards are prone to spontaneous ignition, a problem faced in every country that stores or transports coal. Depending on the environment-temperature, ventilation, and the rank of the coal-heating and self-ignition can be a longer or shorter process, but the possibility can never be entirely dismissed. A plethora of studies have modelled this oxidation behavior and proposed countermeasures. Most often, human intervention is necessary, which is both slow and dangerous for the firefighters involved. In this study, we propose to build a complete firefighting solution which is mounted on a number of towers sufficient to cover the area of an open coal yard, complete with redundancy. Each tower includes an inexpensive infrared detector, a water dispenser and a controller programmed to identify areas of elevated temperature, and actuate the dispenser. The heat direction algorithm calculates the parameters to position the water dispenser so that it covers the area. A prototype has been built from inexpensive components to demonstrate the effectiveness at detecting and extinguishing arising fires, and a solution has been costed for the coal yard in the case study. This work has been conducted in collaboration with the managers of the coal yard of a power plant.

Pool Fire Suppression Using CO2 Hydrate

“…Density at 20 The following popular compositions were used as extinguishing agents for the containment and suppression of fires involving liquid fuels [14,15,[43][44][45]: tap water, snow, and ice (for low-temperature climatic conditions where water supply is a problem), foaming agent emulsion (kinematic viscosity at 20 • C: no more than 200 mm 2 •s −1 , pH at 20 • C: 6.5-10) with concentrations of 1% (density of the composition: ρ = 1068 kg/m 3 ) and 5% (density of the composition ρ = 1128 kg/m 3 ), and carbon dioxide hydrate powder and tablet.…”

Simulation on Harmful Gas Control by Balanced Pressure Ventilation in the Fully Mechanized Caving Face under Sealed Fire Area of Small Coal Mine

“…Due to the lack of corresponding information and the difficulty in sealing the air leakage, it brought high safety risks to the advancement of the working face . Therefore, the development of appropriate ventilation technology for the characteristics of gas emergence under the sealed fire area of small coal mine is the key to safe mining …”

“… 7 Therefore, the development of appropriate ventilation technology for the characteristics of gas emergence under the sealed fire area of small coal mine is the key to safe mining. 8 …”