Cooler for hot smoke-laden gases

Claim 1

A cooler for hot smoke-laden gases which are to be cleaned by a pocket or tube filter situated in a downstream location, the cooler having a housing of generally rectangular horizontal cross section through which the smoke-laden gas flows from top to bottom or from bottom to top, and which is provided with cooling elements within the housing through which cold external air is conducted perpendicularly to the direction of flow of the smoke-laden gas around the cooling elements, and wherein: the cooling elements are loose tubes of generally oval or flattened oval shape, which project through openings in two opposing walls of the cooler housing, said tubes being arranged above one another and in parallel rows, an annular flange outside the housing being firmly or detachably connected to one end of each cooling tube and an external loose annular flange at the other end of each cooling tube, a rod passing through the cooling tube and being connected at one end to one of the flanges, an abutment on the opposite end of said rod, a compression spring engaged at one end with said abutment and applying a force at the opposite end to said loose flange, and a gasket located between each flange and the opposed external wall surface of said housing whereby each gasket is pressed into or against the annular gap which surrounds the related cooling tube where it projects through the opening in the wall of the housing.