Two-gas heat exchanger with plastic exchange surface

摘要

Two-gas heat exchanger with plastic exchange surface. It comprises a bundle of tubes 2 installed between a first plate 3 and a second plate 4 which are firmly attached to rigid spacer means 5, coaxial with the said tubes, each tube having its ends 6, 7 fixed in a sealed manner to the first plate and to the second plate respectively, one of the gases flowing outside the tubes and the other flowing inside the tubes. According to the invention, the tubes are made of plastic, the pressure of the gas flowing inside the tubes being constantly greater than the pressure outside, one or more of the same ends of the tubes emerges into a manifold 10, 12, at least one of the plates is movable and provided with compensation means 16 for providing the tension in the tubes and the exchanger comprises means 18 for spacing the tubes. Application to the recovery of the heat in a gas.