Coiled heat exchanger useful for liquefaction of a natural gas, comprises first tube bundle, which has majority of tubes wound by a first core tube and second tube bundle, which has majority of tubes wound by a second core tube

摘要

The coiled heat exchanger useful for liquefaction of a natural gas, comprises first tube bundle (1), which has majority of tubes wound by a first core tube (2) and second tube bundle (4), which has majority of tubes wound by a second core tube (5). The first tube bundle is surrounded over a part of its length by an outer, second tube bundle. The inner diameter of the core tube of the second tube bundle corresponds approximately equal to the outer diameter of the first tube bundle. The coiled heat exchanger useful for liquefaction of a natural gas, comprises first tube bundle (1), which has majority of tubes wound by a first core tube (2) and second tube bundle (4), which has majority of tubes wound by a second core tube (5). The first tube bundle is surrounded over a part of its length by an outer, second tube bundle. The inner diameter of the core tube of the second tube bundle corresponds approximately equal to the outer diameter of the first tube bundle. The tubing coil of the first tube bundle and the tubing coil of the second tube bundle extend approximately over the same length of the respective core tube. Outer spaces are connected in flow connection around the tubes of the first tube bundle and the second tube bundle. The second core tube forms a part of a cover, which limits the outer spaces around the tubes of the first tube bundle. The second tube bundle is surrounded by a cover, which limits outside spaces around the tubes of the second tube bundle. The outer spaces are separated from each other in liquid tight manner. The first tube bundle and the second tube bundle are distinguished in their parameters such as tube inner diameter, tube outer diameter, tube sheet strength, tube length, tubing distance, number of tubing positions, upward gradient of the tubing coils, number of tubing groups, thickness of the spacers and number of spacers. A third tube bundle has a majority of tubes wound around a third core tube, which encloses first and/or the second tube bundles over a part of their lengths. An independent claim is included for a method for the production of coiled heat exchanger.