JPS6335277Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a vertical shell-and-tube heat exchanger that exchanges heat between high-temperature gas on the primary side and gas on the secondary side, particularly for improving the manifold section provided in the lower part of the inside. This is related.

Figure 1 shows an overview of a conventional heat exchanger, with vessel 1
There is a primary side high temperature gas inlet nozzle 2 and an outlet nozzle 3.
A secondary gas inlet nozzle 4 and an outlet nozzle 5 are provided.

Reference numeral 6 denotes a heat transfer tube, one end of which is in contact with an upper tube plate 7, supported and fixed by a support plate 8, and the other end of which is in contact with a manifold 10 at the lower end of the center pipe 9.

The high-temperature primary gas on the heating side flows in through the inlet nozzle 2, exchanges heat with the group of heat transfer tubes 6, and flows out through the outlet nozzle 3.

On the other hand, the secondary gas on the side to be heated flows in from the inlet nozzle 4 and is heated by the high temperature primary gas while passing through the tube plate 7 and inside the heat transfer tube 6.
It enters the manifold 10, rises inside the center pipe 9, and flows out from the outlet nozzle 5.

The heat exchanger tubes 6 fixed by the support plate 8 as described above are connected to the manifold 10 via the inner and outer connecting pipes 11, as shown in FIG.

Therefore, in a large-capacity heat exchanger in which the number of heat transfer tubes 6 increases, the number of connecting tubes 11 also increases, but the number of heat transfer tubes 6 that can be accommodated in one stage of the manifold 10 depends on the diameter of the manifold. This results in an increase in the number of stages, that is, an increase in the length of the manifold 10.

As a result, the connecting pipe 11 becomes longer, but since there is no appropriate support method, there remains a major problem in the strength of vibrations caused by gas flow and earthquakes.

The present invention was proposed to solve these problems, and it consists of a large number of heat transfer tubes arranged spirally around a center pipe, and a large number of heat transfer tubes arranged radially around the center pipe. In a heat exchanger that is supported by a heat exchanger tube support plate and the lower ends of the heat exchanger tubes are connected to the manifold at the lower end of the center pipe via connecting pipes, the vertical length of the outer circumference of the heat exchanger tube support plate is the inner circumference. This relates to a heat exchanger characterized in that the heat exchanger tubes are longer than the vertical length, and the heat exchanger tubes on the outer circumference are supported to a lower position than the heat exchanger tubes on the inner circumference by the heat exchanger tube support plate.

In the present invention, as described above, the heat exchanger tube support plate is divided into a plurality of segmented heat exchanger tube support plates having different lengths, and the space between the lower end of the heat exchanger tube supported by each segmented heat exchanger tube support plate and the manifold is Since these are connected to each other by connecting pipes, the connecting pipes are fixed by the sectional heat exchanger tube support plate up to the very vicinity of the manifold welding part.

Therefore, according to the present invention, the connecting pipe can be made sufficiently short, so that the strength against fluid vibrations and earthquakes can be improved.

The present invention will be described below with reference to the illustrated embodiments.

The heat exchanger tube support plate is divided into a plurality of segmented heat exchanger tube support plates 21a, 21b, and 21c whose lengths increase from the manifold side to the outside, and whose lengths are different from each other and whose movements are restrained from each other. is,
Connecting pipes 22a, 22b, 22c are connected to the lower ends of the heat exchanger tubes supported by the respective partition plates, and each of the connecting pipes 22a, 22b, 22c is fixed to the manifold 23 by fitting.

Therefore, each of the connecting pipes 22a, 22b, 22c is fixed to the immediate vicinity of the connecting portion to the manifold 23 by the segmented heat exchanger tube support plates 21a, 21b, 21c.

As a result, the connecting pipes 22a, 22b, 22c
It is possible to make it sufficiently short, and the strength against fluid vibration and earthquakes is improved.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view schematically showing a conventional heat exchanger, Fig. 2 is a front view of its manifold section, and Fig. 3 is a longitudinal sectional view schematically showing a conventional heat exchanger.
FIG. 4 is an enlarged view of the portion shown in FIG. 3. FIG. 5 is a front view showing the manifold part in an embodiment of the heat exchanger according to the present invention. It is a diagram. 21a, 21b, 21c...Segmental heat exchanger tube support plate, 22a, 22b, 22c...Connecting pipe, 23...
...manifold.

Claims (1)

[Scope of utility model registration request] A large number of heat exchanger tubes arranged spirally around a center pipe are supported by heat exchanger tube support plates arranged radially around the center pipe, and the lower ends of the heat exchanger tubes are connected to the center via connecting pipes. In a heat exchanger connected to a manifold at the lower end of a pipe, the vertical length of the outer peripheral part of the heat exchanger tube support plate is made longer than the vertical length of the inner peripheral part, and the heat exchanger tube support plate supports the heat exchanger tubes in the outer peripheral part to the inner peripheral part. A heat exchanger characterized in that it is supported to a lower position than the heat exchanger tubes.