Shell-and-tube heat exchanger

FIELD: heating.

SUBSTANCE: invention can be used for heating liquid and gas in technological processes of oil refining, petrochemical, gas and other industries. Heat exchanger contains a casing, pipe walls and grates with heat exchange pipes. Between transverse walls damping baffles that contain rectangular disk packages mounted between rows of pipes parallel to each other in a transverse plane exchanger, and rectangular disk packages of rectangular cross section mounted between rows of pipes parallel to each other in another heat exchanger transverse plane are installed.

EFFECT: increase of endurance.

3 cl, 7 dwg

 

The invention relates to heat exchange apparatus, intended for heat exchange of liquid and gaseous media in technological processes of oil refining, petrochemical, chemical, oil, gas, nuclear and other industries.

Known shell and tube heat exchanger containing casing, distribution chambers, fittings, tube, heat exchanger tubes, turbulizers transverse segmental baffles (Domashnev ROAD Design and calculation of chemical apparatus.- M: motor cycle", 1961, THE 3612-023-00220302-01, THE 3612-024-00220302-02 and others).

A disadvantage of such a heat exchanger - low durability.

The objective of the invention is the increased durability of the heat exchanger.

This problem is solved in the following way. Shell and tube heat exchanger contains a casing, distribution chambers, fittings for inlet and outlet of fluids, tube, heat exchanger tubes, turbulizers transverse partition with a segmental cut-outs, between transverse bulkheads installed damping partitions, each of which is made of two rows of packages straight rectangular steel plates are installed in the gaps between the rows of tubes, the first row of packages consists of parallel packages that are installed in the same transverse plane of the heat exchanger, the second row of packages sostoi the parallel packages installed in another transverse plane of the heat exchanger, the rows of packages installed with a gap and the angle between the packets of the first and second rows equal to the angle of arrangement of the tubes in the heat exchanger, the tubes in the transverse partitions installed with the annular gap.

Figure 1 shows a General view of the heat exchanger, figure 2 is a longitudinal section of the tube bundle and the damping partitions in figure 3 - section a-a in figure 2, figure 4 - cross-section B-B in figure 2, figure 5 is a view In figure 3, figure 6 - view of G on figure 4, figure 7 shows the elastic deformation of the damping plates partitions.

Shell and tube heat exchanger includes a casing 1, a distribution chamber 2, the nozzle 3 for supplying and fittings 4 to drain the coolant. On the ends of casing pipe installed grating 5 with holes for the passage of heat exchange tubes 6. The tubes 6 are installed in Reshetko and skipped through turbulizers partitions 7. The casing 1 is mounted on a support 8. Partition 7 in the form of disks with holes for the passage of heat exchange tubes 6 are installed transversely heat-exchange tubes are cut into segments.

Between the transverse partitions installed damping partition. Each partition contains packages of several straight rectangular steel plates 9, which are located between parallel rows of tubes in taproom is nice (2, 3). Packages of plates 9 are in the same transverse plane of the heat exchanger. The package 10 containing several straight rectangular steel plates and located in different transverse plane of the heat exchanger with axial gap 11 relative to the package 9. Packages 9 and 10 is installed between the rows of tubes and form an angle equal to the angle of arrangement of the tubes in the heat exchanger defined specifications. Figure 3, 4, this angle is equal to 90°because pipes are located on the square. For the location of the pipes on the triangle angle between packets 1 and 2 is equal to the angle at the vertex of an equilateral triangle, that is, 60°. The thickness of the plates and their quantity in a package is determined by the pipe diameter d and pitch p. for Example, for pipes with a diameter of 20 mm and a step 26 mm, the thickness of the package is equal to 6 mm and the package can be recruited from four plates of a thickness of 1.5 mm (figure 5, 6). The axial gap 11 is necessary to reduce the hydraulic resistance of the damping partitions. 7 shows the elastic deformation of the straight plates with the fluctuation of the pipes in different planes. Pipe 6 in the transverse partitions installed with the annular gap 12.

Heat transfer in shell-and-tube heat exchanger is as follows.

The fitting 3 in diameter Dy in the distribution chamber 2 is supplied under pressure coolant. From the camera 2, the coolant will crack the AET on heat exchange tubes 6 and goes to the second distribution chamber 2, and out of the fitting 4 to the consumer. Another fluid through the inlet fitting 3 diameter Dy 1 enters the exchanger casing with an inner diameter DB and moves along the annular space, flowing walls 7. Heat transfer occurs by convection from the high temperature heating medium through the walls of heat exchanger tubes 6 to the coolant at a low temperature. Passing through the internal cavity of the casing 1, the fluid enters the nozzle 4 of the heat exchanger. To improve heat transfer fluid turbulizers transverse partitions, turbulization of the flow causes fluctuations of the tubes in the tube bundle. To reduce the oscillation amplitude is set damping partition. 7 shows the elastic deformation of the plate packs with the fluctuation of the pipes in different planes. Since the deflection plates are different, that is the sliding of one plate relative to another. This improves the damping properties of a partition. Reducing shock tubes on the edges of the openings in the transverse walls contribute to the annular gap 12, in which the pipes are moved when their elastic deformation.

1. Shell and tube heat exchanger containing casing, distribution chambers, fittings for inlet and outlet of fluids, tube, heat exchanger tubes, turbulizers transverse partitions with segment the mi cut characterized in that between the transverse partitions installed damping partitions, each of which is made of two rows of packages straight rectangular steel plates are installed in the gaps between the rows of tubes, the first row of packages consists of parallel packages that are installed in the same transverse plane of the heat exchanger, the second row of packages consists of parallel packages installed in another transverse plane of the heat exchanger, the rows of packages installed with a gap and the angle between the packets of the first and second rows equal to the angle of arrangement of the tubes in the heat exchanger, the tubes in the transverse partitions installed with the annular gap.

2. Shell and tube heat exchanger according to claim 1, characterized in that at the location of the pipes according to the square of the angle between the rows of packets equal to 90°.

3. Shell and tube heat exchanger according to claim 1, characterized in that at the location of the pipe on the triangle to the angle between the rows of packages is 60°.



 

Same patents:

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