PROCESS HEAT EXCHANGER OF NUCLEAR POWER PLANT

摘要

FIELD: heating. ^ SUBSTANCE: invention relates to energy industry and can be used in purge systems of the first and second circuits of a nuclear power plant. A tube bundle is mounted in the middle part of a case and forms a peripheral cavity; the bundle is made as heat exchanging tubes wound around a vertical holder, upper and lower horizontal grids connected to the respective holder ends and an outer vertical housing with its lower section being connected to the lower grid. The upper housing section can be moved lengthwise in respect to the upper grid. A supporting ring is mounted in the case horizontally to the cavity bridging and fixed at its inner wall. The ring is placed in the lower case part and is connected to the lower grid of the tube bundle. Such design of the heat exchanger results in the fact that the housing is constantly subject to a compression force which is compensated by the elasticity of the heat exchanging tubes enclosed by the housing. The housing is not subject to additional temperature stresses in varying duty modes of the heat exchanger. ^ EFFECT: reducing probability of the housing destruction and improving operational reliability of the process heat exchanger of a nuclear power plant. ^ 2 cl, 2 dwg