Announcements about Clinker Cooler In Cement Plant

Clinker cooler in cement plant is used to cool high temperature clinker discharged from rotary kiln to make the tempratue can be withstood by the downstream conveyor, reservoir and cement mill, at the same time, the high temperature clinker sensible heat is recovered in kiln system to improve the thermal efficiency of burning system and quality of clinker.
The clinker cooler in cement plant has nearly ten kinds of types, but the modern NSP sintering system usually use single cylinder, multi cylinder and grate cooler.

The clinker cooler should as far as possible put the clinker sensible heat (1200-1500kJ/kg clinker) into the recycling burning system, improve the secondary or third air temperature and reduce the fuel consumption to be lowest.
Select the most appropriate clinker cooling rate which greatly affect the quality of the clinker to improve the quality of cement and improve the grinding of clinker. The three kinds of commonly used cooling machine with the kiln pre cooling zone are of different length, grate cooler cooling zone is the shortest. therefore, clinker unloaded from the kiln temperature is maximum (up to 1300-1400℃).
When clinker get into the cooler, blowing cold to the clinker( ambient temperature), clinker is subject to rapid cooling, clinker liquid phase can not complete crystallization, part of it become glassy phase and another part form the finer crystals. Because of the hot and cold cracking of the clinker, it will produce heat stress and crack, so it is more easy to be grinding. Clinker temperature in single and multi cylinder cooler inlet is lower (1100-1300℃) due to the longer kiln pre cooling zone, the two cooling machine is counter current heat exchange, cooling air temperature of cooler clinker inlet has reached 700-800℃, so the clinker can not to be cooled.
The clinker should be cooled to be as low as possible to meet the requirements of the clinker conveying, storage and cement grinding. For multi tube cooler, the cooling air volume of the whole machine is required to be used in the kiln as secondary air, and one part of the cooling air of the single cylinder cooling machine is used as the secondary air, and the other part can be extracted from the kiln head for three times air. Their common characteristic between multi and single cooler is that Air flow rate of the cooling machine is limited by the amount of air required for the kiln system. We can not arbitrarily increase the air volume of the cooling material cooked to a enough low temperature, the general cooler clinker temperature is 200-400℃, such a high temperature material is bad for conveying equipment and storage, also it can not directly be grinding. Grate cooling machine on one hand can supply secondary and three times to kiln system, on the other hand it can make cooling zone air as drying heat source for raw material mill, coal mill, and even slag drying machine.
Compare the different types Clinker cooler in cement plant, choose the one which is most appropriate.