Pulverized coal in the rotary kiln is how to burn?

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Pulverized coal combustion in the rotary kiln, firing from the scene to the later case of combustion, the surface looks like nothing complicated problems, ignition

personnel provided they have the materials needed for ignition and temperature required for pulverized coal combustion, ignition work will smoothly. Any fuel

combustion ignition and combustion process has a two phase. Slow changes in the oxidation reaction is vigorous oxidation reaction (i.e., combustion) of the moment

is called fire, transition temperature is called the minimum ignition temperature (also called ignition or ignition point). Burning the fuel in the early stages of torsion,

the release of volatiles and the surrounding air to form a combustible mixture of the minimum ignition temperature, called the ignition temperature of the fuel. The

reality is that the combustion of pulverized coal in the rotary kiln process is relatively complex, coal burning, while also moving to the kiln, and in the combustion

process, to conduct heat, these aspects and influence each other. Rotary kiln temperatures required pulverized coal through the burner nozzle obtained after

combustion of pulverized coal ejected. But in the kiln, the kiln does not heat, you need at a distance of 3 ~ 5m kilns Place a timber, cotton and other combustible

ignition and combustion of waste oil, so that the temperature reaches the ignition temperature of pulverized coal injected into coal in before combustion. Coal is first

heated to dry, containing 1% to 2% of the water discharge, generally require 0.03 ~ 0.05s. However, in the case of crude wet coal, preheating and drying time should

be extended. Preheating and drying the length of time attempting to determine the length of the black flame. The temperature rises to 450 ~ 500 ℃, the volatile start

to escape, at 700 ~ 800 ℃ when all escape, when the air is so volatile encounter ignited. Volatile combustion duration, and number of volatile content, the size of the

gas flow rate, temperature and low for. Low volatile gas flow speed, high temperature, burning time off; otherwise contrary. High volatile coal, fire early, burning fast,

attempting a short black and white flame length; low volatile coal is the opposite. Please indicate Henan YuFeng Heavy Machinery