| 摘要 |
The convection cooler comprises an oblong vertically positioned pressure vessel (1) with an upper gas inlet (5) and a lower gas outlet (8) and the vessel accomodates a heat exchange element (10) with heat exchange surfaces (11) for flow of water and steam under high pressure. The heat exchange surfaces define gas ducts (12) divided into straight sections (13) connected with short duct sections (14) which, when viewed in the direction of the gas flow, slope towards the bottom of the vessel. Adjacent duct sections (13) are displaced in the lateral direction at a distance corresponding to the width of the duct. This change in direction of the duct causes the gas flow to be thoroughly mixed during passing, resulting in a uniform distribution of the temperature across the entire cross-sectional area of the duct. At their top the heat exchange surfaces (11) have a common discharge header (18) which through suspensions (19) are suspended at the top of the vessel so that the full load of the heat exchange element (10) is carried by the discharge header (18). |
