Problems with boiler combustion
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What happens when there is too much or too little air during boiler combustion? What can be observed from the chimney? What is the color and state of the flame? What reactions take place?
Excessive air can lead to an increase in exhaust gas temperature, resulting in higher heat losses from the exhaust gases, which is not conducive to energy savings. Insufficient air leads to incomplete combustion of the fuel, resulting in the formation of carbon monoxide and an increase in the amount of ash and residue; this causes fuel waste and hinders efforts to save energy and reduce emissions.
Excessive air mainly leads to increased heat loss due to exhaust smoke, which hinders energy savings, and causes the chimney to emit white smoke. There is not enough air, so the chimney emits black smoke; the flame should be a dark red color. This leads to incomplete combustion of the fuel, and the slag still has a high calorific value, resulting in significant waste. In addition, a large amount of carbon monoxide is generated in the flue gas, which increases the carbon content in the fly ash; this not only pollutes the environment but also causes erosion of the boiler tubes. It is estimated that the environmental protection agency will arrive soon to issue a fine.