Processing Steps When the Rotary Kiln Equipment Preheater is Blocked

The main function of the preheater in the rotary kiln equipment is to recover the high temperature exhaust gas generated during the calcination process for the preheating of the raw material, which can effectively improve the calcination efficiency and save fuel. However, during the use of the preheater, the phenomenon of clogging of the preheating system sometimes occurs. How to deal with this situation properly, and how to prevent this from happening?

The main function of the preheater in the rotary kiln equipment isto recover the high temperature exhaust gas generated during the calcinationprocess for the preheating of the raw material, which can effectively improvethe calcination efficiency and save fuel. However, during the use of thepreheater, the phenomenon of clogging of the preheating system sometimesoccurs. How to deal with this situation properly, and how to prevent this fromhappening? Today ZK CORP will discuss this topic with everyone.

First, the processing steps after the plugging kiln equipmentpreheater system is blocked

1. After the clogging phenomenon is discovered, measures such asstopping material, coal, and slow turning kiln should be taken immediately.

2. Determine the blockage and formulate a clearing plan. If theclogging is slight, you can reduce the coal and continue to turn the kiln whenyou can clear it later. If the blockage is severe, stop the material, coal, andslowly turn the kiln.

3. When the traffic is congested, an ultra-high compressed airspray gun or water cannon can be used, and the blocked part is directlysmashed. When clearing the plug, the principle of “first down and then goingup” should be adhered to, that is, the lower part of the lower part and theupper part of the back part are ensured that the materials under the armpit canbe smoothly discharged.

4. Pay attention to the kiln exhaust fan valve (not to close theexhaust fan) when clearing the plug, and keep the negative pressure state inthe preheater system to facilitate the plugging. The blockage material is notremoved for a long time, and the temperature is lowered. After the material iscooled, it is formed into a hard clinker which is more difficult to handle.

5. After the plugging is completed, carry out detailed inspectionof the preheater system to ensure that the cone parts, the spreading plate andthe valve of each level of the cyclone are clean and intact. Make sure that allthe holes, the material holes, etc. are tightly sealed, the pressure iseverywhere, and the temperature returns to normal.

Second, the preventive measures for the plugging of the preheatersystem of the rotary kiln equipment

1. Strictly control the quality of raw materials and fuels,strengthen internal management, and regularly discharge dust ash, so that theelectric dust collection back of the rotary kiln equipment kiln is evenly addedto the raw material homogenization warehouse. And strengthen the fireoperation, timely and reasonable distinction between matching wind, coal,materials and kiln speed, stabilize the thermal system in the kiln, avoidsharply increasing and drastically, major adjustments.

2. Stabilize the raw material composition, control the kiln tailsmoke chamber, the decomposition furnace and the preheater outlet temperatureof the various stages to match the temperature with the composition, preventlocal overheating, and prevent the formation of incomplete combustion andreducing atmosphere. Seal the air leakage points of preheaters and flap valvesat all levels to ensure stable system conditions.

3. In the parts where frequent crusts are easy to block,reasonably add the material hole, monitoring and early warning device. At thesame time, in the preheater and decomposition furnace working surface, equippedwith clearing pipe, steel brazing, hammer, water cannon and other tools toensure its integrity.

The above measures can effectively prevent the blockage of thepreheater system, so as to follow the blockage and clearing, to reduce the timeof failure. For more information on mining equipment, please consult our onlinecustomer service.