Measurement & Control Systems

Water based kiln cooling

Control your kiln shell temperature

Reliable and effective cooler for kiln shell

Due to the in­creas­ing us­age of sec­ond­ary fu­els which are rel­a­tive­ly in­ho­mo­ge­neous there are more fluc­tu­a­tions in the burn­ing pro­cess. This leads to in­creas­ed bur­den for the re­frac­to­ry and the kiln shell – hot spots may oc­cur. In or­der to re­duce this bur­den large cooling fans which are blow­ing am­bi­ent air are wide­ly used.

Unfortunately this type of cooling shows some disadvantages:

• due to the low heat capacity of air a huge throughput is needed
• the consumption of electrical energy is high
• the cooling cannot be targeted specifically to a hot spot on a circumference
• fans emit a substantial amount of noise

Efficiency by water cooling

To overcome these dis­ad­van­tages KIMA‘s KilnCooler uses water­spray noz­zles and pre­cise dosing valves which are con­trolled by an infra­red tem­per­a­ture sensor. The water­spray of an in­di­vid­u­al noz­zle is switched on only while its in­fra­red sen­sor de­tects a hot spot.

Benefits:

• efficient cooling
• flexible usage for hot spots and complete kilns
• ready-to-use modules
• easy installation or relocation
• targeted cooling on kiln‘s circumference
• low noise emission

The waterspray cooling is efficient and “on the spot”

The waterspray is controlled by a FUZZY-controller which uses infrared sensors to precisely locate hot spots on a circumference.

This means: only the hot spot is cooled down not necessarily the entire circumference.

The “hot spot temperature” can be set individually for every nozzle.

By application of KilnCooler, a hot spot can be cooled down rapidly but carefully avoiding any shrinkage of the kiln shell. Cooling rate is up to 2 Kelvin per minute. After cool down the shell temperature is kept on its nominal value thus eliminating mechanical tensions.