Patent ID: 7740057
Filing Date: 2010-06-22
Classification: F28D,F28F,Y10T

Abstract:
1. A shell-and-tube heat exchanger with helical baffles, comprising: a shell body; a shell side inlet tube a shell side outlet tube heat exchange tube bundles; tube plates; and helical baffles arranged on the tube bundles; wherein, said helical baffles comprise a plurality of inner helical baffles and a plurality of outer helical baffles, and the heat exchange tube bundles penetrate through the inner helical baffles and the outer helical baffles, and are connected to two tube plates on both ends of the shell body; within each pitch, the inner helical baffles are arranged in a central portion in a space inside the shell body, the outer helical baffles are arranged around the inner helical baffles the outer edge of each inner helical baffle is proximally spliced to the outer helical baffle, and said outer helical baffle is formed by splicing a plurality of helical baffles in such a transition manner that the plate surfaces of individual baffles are continuous to each other along the helical direction, so the outer helical baffle has a plurality of helical cycles and takes the form of a helical baffle with plate surfaces thereof completely continuous, while the inner helical baffles are a plurality of non-continuous baffles; and the shell side inlet tube and the shell side outlet tube on said shell body take the form that fluid is introduced into and discharged out laterally, are closely attached to the outer edge of the shell body, and lead to and from a shell side space in a tangential direction to the shell body.