| 摘要 |
The heat exchanger consists of one or more pairs of outer and inner tubes 1 and 3 respectively connected to superposed first and second tube plates 5 and 7 respectively. The outer tube 1 is closed at that end 2 remote from the first tube plate 5 and the inner tube 3 is open at that end 4 remote from the second tube plate 7 to provide a fluid connection between the tubes. The outer tube 1 is made from a fluorinated thermoplastics polymer and, in use, provides the heat exchange surface through which heat is transferred between a fluid surrounding the outer tube 1 and a fluid circulating through the tubes 1, 3. The heat exchanger has particular application to corrosive environments, especially where one of the fluids, that surrounding the outer tube, is corrosive. Several installations are described, notably for heat recovery from hot concentrated sulphuric acid to generate steam and for heat recovery and depollution of fluegas produced by sulphur containing fuels. <IMAGE> |
