Natural gas is a colorless, tasteless, flammable, explosive gas, high calorific value, the proportion of light, the filtration purification is generally used for household gas, spare parts used in industry.
Gas of main composition is methane, the methane ignition point is 700 ℃, the fuel gas ignition point is higher in a gas.
1, high calorific value, heating value of up to 8500 kj/m3, storage and transport is more convenient and beneficial to focus to send hot melt.
2, does not contain harmful aromatic hydrocarbon material such as benzene, naphthalene, is due to gas fuel, no combustible pellet fuel, burning completely, little environmental pollution.
3, high safety, because the main composition is methane, a gas of methane content in more than 94% (
Less than 90% of the gas we called moisture)
, the burning of combustible gas also depends on the concentration of the ignition temperature of methane, scope, the ignition temperature of 700 ℃, fire concentration range 5 -
Is 15%, so, want to natural gas combustion, must meet the requirements of high temperature and concentration.
4, gas calorific value is high, the combustion air ratio of 10:1, density ratio is 1-0.
6, burning and the narrow concentration range, combustion rate depends on two with a mix of speed, the requires and combustion control and choosing combustion equipment, adjustable flame should be fully considered.
5, glass furnace melting heat transfer mainly by flame radiation and flame radiation heat transfer capacity depends on the brightness of the flame, the flame intensity depends on the amount of carbon particles in the process of fuel combustion, in all kinds of fuel, gas carbon/hydrogen mass ratio is 3.
2, carbon/hydrogen mass ratio of liquid fuel is 6.
0 -- -- -
4, solid fuel quality than 10 __ - carbon/hydrogen
30, say so, want to consider when using natural gas as a heat source for heat loss due to the flame brightness is low, how to increase the flame brightness.
6, because of the change in heat transfer characteristics of flame flame brightness to reduce both the flame transfer heat to reduce, when material get the same quantity of heat, total quantity of heat of fuel consumption will increase, exhaust temperature will be significantly higher, considering burning natural gas heat recovery.
With natural gas as fuel melting glass liquid, should fully consider its combustion characteristic, such as the structure characteristics of the kiln, heat preservation condition, burner performance, etc. , to ensure that the glass melting quality and energy consumption.