SU1541477A1 - Heat-exchanger - Google Patents

Abstract

The invention allows to intensify heat exchange in a shell-and-tube heat exchanger with transverse partitions. In the casing 1 is placed a bundle of U-shaped heat exchange tubes 4 fixed in a tube plate 5 and enclosed in a shell 6. In the annular space, transverse partitions 7 are installed with sections for the passage of the medium. Peripheral partitions 8 have a value not exceeding the radius of the shell 6, and the remaining partitions 7 have central sections at an angle to the axis of the pipe 4 and equipped with turbulators 9. This implementation of partitions allows to increase the velocity of the medium in the area of the inlet nozzles 2 during operation of the heat exchanger and removal of the medium 3 and in the central part of the heat exchanger, which contributes to the intensification of heat exchange. 2 hp ff, 2 ill.

Description

I Exit

f konisha ta.

1

The invention relates to shell-and-tube heat exchangers and can be used in marine power engineering.

The aim of the invention is to intensify heat transfer.

1 shows a heat exchanger; figure 2 - section aa in figure 1.

The heat exchanger contains a casing 1 with the inlet pipes 2 and outlet 3 of the annular space environment. In the casing 1 there is a bundle of U-shaped heat exchange pipes 4, fixed in the tube plate 5 and enclosed in the shell 6, which forms an annular gap with the casing 1. In the annular space installed transverse partitions 7 with sections for the passage of the medium. Peripheral partitions 8 have a radial size not exceeding the radius of the shell 6, and the remaining partitions 7 have central sections angled to the axes of the pipes 4 and equipped with turbulators 9 in the form of alternating projections and depressions. Between the central portions of adjacent partitions 7, spacers 10 are installed with elastic elements directed toward the sidewall 6.

The heat exchanger operates as follows.

I

Shell annulus

through the pipe 2 is fed into the annular gap between the casing 1 and the shell 6 and then through the holes in the latter enters the annular space. The passage between the partitions 7 and 8, the medium washes in the pipes 4, exchanging heat with the coolant of the tube space. The presence of peripheral partitions 8 of reduced dimensions allows for a constant cross-section for the cross-section.

annulus space and its required speed. The use of partitions 7 with central sections located at an angle to the axes of pipes 4 provides for a reduction in the flow area in the stagnant zone where there are no heat exchange pipes 4 and an increase in the velocity of the medium, which corresponds to the intensification of heat exchange. The turbulators 9 in this case additionally turbulize the flow and intensify the heat exchange. The presence of the spacers 10 with elastic elements between the pereporkami 7 reduces the vibration of the pipe 4 in the process of operation of the heat exchanger and increases its operational reliability.

Claims (3)

1. A heat exchanger comprising a housing with a beam placed inside, U-shaped heat exchange tubes fixed in a tube plate and transverse partitions installed in the annular space with sections for the passage of a heat transfer fluid, characterized in that, in order to intensify heat exchange, the peripheral partitions have a radial value not exceeding the radius of the casing, and the remaining partitions have central areas in the annular space, located at an angle to the axis of the pipes. 2. Heat exchanger according to claim 1, characterized in that the central portions of the partitions are equipped with turbulators. 3. The heat exchanger according to claim 1, wherein the central part of the adjacent partitions is installed between the central parts of adjacent partitions with elastic elements.  turned 2