To provide an inexpensive exhaust gas cooling tower maintaining for a long period of time the rotation of a crusher installed in an exhaust gas cooler and causing no damage of a power transmission belt even if the rotation of a rotating shaft of the crusher is impeded by some cause to slow down or stop the rotation.

The exhaust gas cooling tower 10 has the coagulated ash crusher 5 installed at an ash discharge part 6 at the lower part of a tower body 1. The rotating shaft for rotating a blade of the crusher, and a power source for rotating the rotating shaft, are connected by a timing belt, and the rotating shaft or the timing belt is provided with a non-rotation detector (sensor). In the exhaust gas cooling tower with the coagulated ash crusher installed at the ash discharge part at the lower part of the tower body, the wall of the crusher body is provided with a through-hole through which the rotating shaft for rotating the blade of the crusher passes to the outside, and the through-hole and the power transmission mechanism for transmitting power to the rotating shaft, are airtightly connected. The crusher is installed downstream of an air sealing device 4.