Principle and adjustment method of rotary kiln burner

1. Positioning of burner

Many companies use "light column" burners positioning, accurate control, but not easy to operate. It is better to use the position scale to locate on the kiln head section. Generally, it is better to control the position slightly to the right of the X axis of the kiln head section or slightly to the fourth quadrant. In special process conditions can do a little fine tuning.

2. Influence of burner position on kiln conditions

During installation, when the burner is in the horizontal position, the center point and the cross section center point of the kiln are at the same point. Before the end of each overhaul, the position of the burner is corrected and checked more than once. During normal production, the method to determine the correct position of the burner and to adjust the burner is as follows:

Look from the kiln, the shape of the flame should complete strong, lively, not scour kiln skin, also can't top material calcined, outer flame of fire in contact with the material with stove, if the location of the burner is too partial, the flame will flush into the kiln, kiln cylinder local high temperature, reduce the service life of kiln lining, and the calcining zone of the kiln will be backward outspread, furnace thermal system disorder, serious when, soon red kiln feeding. At this point, the burner should be properly adjusted to the direction of the material, so that the flame flame and material contact. If the burner is too close to the material, the flame will support the material, causing the top fire forced burning incomplete coal powder is wrapped by the rolling material, burning with a serious reduction atmosphere, reducing the quality of clinker. The gas with a serious reducing atmosphere is brought into the preheater system to reduce the temperature of the liquid phase of the material, make the preheater system crust or even block, and affect the normal calcining of the kiln. At this time, the burner should be properly adjusted away from the material to make the flame smooth and powerful.

3. Adjustment of normal and abnormal conditions

In normal operation, if the temperature of the kiln firing zone is low, the opening of the inner wind butterfly valve should be increased and the opening of the outer wind butterfly valve should be reduced to shorten the flame and improve the temperature before kiln. When the sintering temperature is too high, it is necessary to open the outer wind butterfly valve and close the inner wind butterfly valve, so as to make the flame elongate, maintain a certain fast turning rate of the kiln, and improve the output and quality of clinker.

If found thick kiln stove or ring, should be disposed in time, otherwise it will affect the yield and quality of clinker, into the furnace burner that outside the wind butterfly valve fully open, endogenous wind butterfly valve is short, the center of butterfly valve will open a big wind, make the flame, burning with ward, improve the body temperature, if found burnt with a flat piece of material, certificate after circle has dropped, the burner all back to the furnace mouth position, outside the wind butterfly valve closed small open degree, endogenous wind butterfly valve open big, center of butterfly valve to close small wind, shorten the flame, improve kiln speed, good control of clinker junction temperature, protect the calcining zone kiln. Because there are a lot of factors, should be according to the kiln type and the structure of the ring, the specific situation analysis, as long as the method is reasonable, it is not difficult to deal with.