The flow of hot gases

The hot gases flow into the cooler vertically downwards along the cooling elements. The gases are deflected through 180° and a pre-separation of the coarse dust takes place. Cold air fans suck cold air out of the environment and transport it crossways to the hot-gas flow through the cooling elements. A temperature control element switches the necessary number of cold air fans on.

The geometry of the cooling elements and the distance between the pockets are designed so that the cooler cannot become clogged up with dust. An automatic cleaning device is installed for sticky dust.

The cooling air has to be pre-warmed if it is likely that the temperature could fall below the dew point on the cooling elements during the cooling of hot process gases. Unlike KS, preheating of cooling air is provided with KU. In this case, a partial flow of heated cooling air and fresh air are sucked in together from the cooling air fan. A pre-selected mixing temperature is regulated prior to entry into the cooling elements by opening or closing the fresh-air valve.