JPS5826520B2 - Plate and shell condenser - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a plate-and-shell type condenser in which a plurality of plates are superposed and housed in a container or shell.

In this type of plate-and-shell condenser, the thickness of the container or shell is determined by the internal pressure and diameter of the shell.

However, since conventional plate-and-shell condensers often use square plates instead of rectangular configurations, the diameter of the shell is larger than necessary.

That is, as is clear from FIGS. 1a and 1b, in order to accommodate a square plate P having a heat transfer area of, for example, 225 m, the inner diameter of the shell S is required to be 21.2 m.

In contrast, in the case of a circular plate p, the inner diameter d of the shell S may be at least 16.9 m.

In this way, due to the unnecessarily large shell diameter, the tube sheet and shell thickness were conventionally increased, which increased the condenser price and forced the outer diameter of the shell to increase for the same heat transfer area. .

Incidentally, a conventional method using a circular plate has been known, but in this case, the shell and plate are arranged concentrically, and the shell is placed horizontally and a steam supply port is provided at the top. In this case, a vapor distribution space must be provided in the upper part of the shell, so if the plates have the same heat transfer area, the shell size will still be large.

In view of the above-mentioned drawbacks of the conventional plate-and-shell type condenser, the present invention aims to reduce the shell diameter as much as possible.

A further object of the invention is to provide a smaller and cheaper condenser.

A feature of the present invention is that in a plate-and-shell condenser, a circular plate is used instead of the conventional rectangular or square plate, and this plate is eccentrically placed in the shell on the side opposite to the steam inlet. This is what I decided to do.

EMBODIMENT OF THE INVENTION Hereinafter, the structure of this invention will be described in detail based on the Example shown in drawing.

In FIGS. 2 and 3, 1 is a shell, and 2 is a circular plate, which is housed in the shell 1 in a stacked state, and is fastened between a movable frame 9 and a tube plate 10.

These plates 2 overlap through gaskets, forming alternating two fluid flow paths for cooling water and steam at each plate gap.

5 is a steam supply port, 6 is a steam discharge port, 7 is a cooling water supply port,
8 is a cooling water outlet.

In the gap between the plates through which the cooling water flows, a gasket 3 is installed along the outer periphery of the plate 2 in order to define the periphery of the cooling water passage B.

The cooling water passage B communicates with the cooling water inlet/outlet lowers' and 8'.

A plate gap, that is, a steam flow path A through which steam flows, is disconnected from the cooling water inlet/output lower and 8 by gaskets 4 and 4 attached around them, and is open to the interior space of the shell 1.

The plate 2 is eccentric with respect to the shell 1 in the direction away from the steam supply port 5 (downward in FIG. 2).

Therefore, a wide eccentric steam distribution space is formed in the upper part of the shell 1, and now steam is supplied from the steam supply port 5 to the other side.
If cooling water is supplied from the cooling water supply lower, the cold water flows into each cooling water flow path B from the cooling water input lower', and then flows out to the discharge port 8 through the cooling water outlet 8'.

When the steam is supplied into the shell 1, it branches into the gap between the plates where the gasket 3 is not installed, that is, each steam flow path A, and there, the cooling water flows through the adjacent cooling water flow path B via the plate 2. The condensed liquid flows down the surface of the plate 2 and flows out from the outlet 6.

Note that although the cooling water inlet/outlet lowers' and 8' are circular in the illustrated embodiment, they are not limited to this.

Furthermore, the arrangement is not limited to a horizontal arrangement, and it is also possible to arrange the fluid flow in the same direction as the steam supply port 5 and the discharge port 6, for example, so that the fluid flows are completely opposite flows or parallel flows.

Further, the circular plate 10 may be formed of plastic or the like.

As explained above, this invention provides a steam supply port at the top of a cylindrical shell placed horizontally, a steam discharge port at the bottom, and a gasket surrounding and closing the shell. A large number of plates are superimposed and tightened and arranged between the moving frame and the tube plate so as to alternately form a cooling water flow path and a steam flow path with an open circumference, and are circular plates having a smaller diameter than the inner diameter of the shell. In addition, since it is arranged eccentrically downward with respect to the shell, and a wide eccentric space-shaped steam distribution space communicating with the steam supply port is formed at the upper part of the shell,
When the inner diameter of the shell and the outer diameter of the plate are arranged concentrically with the same difference in dimension, the steam inflow space at the upper part of the shell can be made wider, and after steam flows into the shell from the steam supply port at the upper part of the shell, the above-mentioned Due to the presence of a distribution space consisting of a wide eccentric space, steam can be distributed over the entire length of the shell and passed through all the steam channels formed alternately on each plate, reducing steam inflow resistance. At the same time, it is possible to improve the distribution and flow to each steam flow path,
On the other hand, since steam is condensed by cooling water and its volume is reduced while passing through the steam flow path, there is no problem even if the space on the steam outlet side is small. When forming a predetermined steam distribution space on the inlet side,
The diameter of the shell can be made smaller than when the shell and plate are arranged concentrically, and a small and inexpensive plate-and-shell condenser can be obtained.

[Brief explanation of drawings]

FIGS. 1a and 1b are schematic diagrams showing the relationship between the plate shape and shell diameter of a plate-and-shell condenser. Figures 2 and 3 show an embodiment of the plate-type condenser according to the present invention, with Figure 2 being a longitudinal sectional view taken along a line passing through the steam flow path, and Figure 3 being a partially cutaway view of the shell. FIG. 1...Shell, 2...Plate, 3,
4... Gasket, 5... Steam supply port, 6... Steam exhaust port, A... Steam flow path, B... Cooling water flow path.

Claims (1)

[Claims] 1. A cylindrical shell placed horizontally, with a steam supply port provided at the top and a steam discharge port provided at the bottom, and a cooling water flow path surrounded and closed by a gasket in the shell;
A large number of plates are superimposed and tightened and arranged between the moving frame and the tube plate so as to alternately form steam passages with open peripheries, and the plates are circular plates having a diameter smaller than the inner diameter of the shell,
A plate-and-shell type condenser, wherein the plate-and-shell condenser is arranged eccentrically downward with respect to the shell, and a wide eccentric steam distribution space communicating with the steam supply port is formed in the upper part of the shell.