JPS5847639B2 - Plate heat exchange device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates primarily to plate heat exchange apparatus that handle gas-to-liquid condensation or evaporation.

Regarding this type of heat exchange device, the present applicant has proposed a plate type heat exchange device in which a group of plates, in which a plurality of two types of plates are alternately superposed to form gas passages and liquid passages, are suspended in a container. is proposed first.

The configuration of the plate heat exchange device, for example, the condenser, is as follows:
As shown in Figures 3 to 3.

That is, 1 has a steam supply port 2 at the top and a condensate discharge port 3 at the bottom.
It is a cylindrical casing placed horizontally, and a plate group 4 formed by alternately stacking steam passage forming plates 4a and cooling passage forming plates 4b is a guide stay 5.
It is suspended vertically through the

In the steam passage forming plate 4a, the casket 6 is arranged as shown by the black line, the heat transfer surface is disconnected from the coolant introduction hole T and the outlet hole 8, and the steam introduction opening 9 and the outlet opening 10 are formed. .

The cooling liquid passage structure plate 4b has a heat transfer surface and a cooling liquid introduction hole 7.
A gasket 5 is disposed so as to surround both the lead-out hole 8 and the lead-out hole 8 so as to communicate with each other.

Since both the plates 4a and 4b are arranged alternately as described above, the steam passage A which opens appropriately to the inner space of the casing 1 and the closed coolant passage B are defined in the plate group 2.

The coolant inlet hole 7 and the outlet hole 8 of each plate 4a, 4b are aligned with each other in the plate group, and correspond to communicate with the coolant inlet hole 7 and the outlet hole 8, respectively, on both opposing end surfaces of the plate group 4. and connect the cooling liquid supply port 11 to the casing 1.
and a discharge port 12 are provided.

Now, when steam is supplied from the steam supply port 2 and cooling liquid is supplied from the cooling liquid supply port 11, the steam and the cooling liquid flow between the alternately superposed plates 4a and 4b as follows.

That is, the steam entering the casing 1 from the steam supply port 2 is evenly distributed to the introduction opening 9 of the plate 4a, passes through the steam passage A on the heat transfer surface, and exits from the outlet opening 10 to the interior space of the casing 1. Furthermore, it is discharged to the outside of the casing from the discharge port 3 of the casing 1.

On the other hand, the coolant is supplied from the coolant supply port 11 to each coolant introduction hole 7.
From there, the coolant flows upward into the coolant passage B on the heat transfer surface, flows out from the coolant outlet hole 8, and is discharged from the coolant outlet 12 of the casing 1 to the outside of the casing.

Heat exchange between the steam and the cooling liquid takes place in the passages A and H, the steam is cooled, and the condensed drain is discharged from the casing together with the treated steam.

By the way, in this type of plate heat exchanger, when steam flows into the casing 1, a gap is likely to be formed between the casing 1 and the plate due to incomplete sealing, and the flow of steam is caused by the steam introduction opening 9. normal flow from the steam passage A to the steam outlet opening 10 and out through the condensate outlet 3 of the casing 1 and the plate and the casing 1.
The flow is divided into a short path flowing down from the steam supply port 2 of the casing 1 toward the condensate discharge port 3 through the gap between the two.

Furthermore, since the short-passed steam naturally has a higher pressure than the steam that has flowed down the steam passage A and reached the lower part, that is, has undergone a condensation process, it tends to flow back into the steam passage A from the steam outlet opening 9.

As a result, the flow of steam in the steam passage A is obstructed, resulting in a significant decrease in heat transfer efficiency.

In view of the above-mentioned circumstances, it is an object of the present invention to improve this and obtain a plate-type heat exchanger having a sealing structure that realizes a more reliable seal.

The structure of the present invention will be explained in detail below with reference to embodiments shown in the drawings.

4 to 6 show an embodiment in which the present invention is applied to a condenser.

In the figure, 20 is a frame formed in the shape of a rectangular parallelepiped, 21
23 is an upper panel having a steam supply port 22 integrally fixed to the upper surface of the frame 20; 23 is a lower panel having a condensate discharge port 24 integrally fixed to the lower surface of the frame 20; 25 is a lower panel of the frame 20; A fixed panel having a coolant supply port 26 and a discharge port 27 integrally fixed to the back side, 28 a movable panel detachably fixed to the front side of the frame body 20 by a fastening means 29, and 30 and 30 are fixed panels of the frame body 20. Fastening means 31.31 on both sides
Gasket 32.3 on the inner surface removably fixed by
2 and which together form the casing 33
is formed.

Reference numeral 34 denotes a plurality of plates, which are housed in the casing 33 in a stacked state and are fastened between the fixed panel 25 and the movable panel 28.

These plates 34 are composed of two heat transfer elements h34a,
34a is formed by palm welding into a hollow closed cross-sectional shape, which increases the strength, allows the plate thickness to be reduced, reduces plate thickness resistance, and improves heat transfer performance.

Coolant inlet holes 35 and outlet ports 36 are opened in these plates 34 so as to face each other so as to communicate with the coolant supply port 26 and discharge port 27 of the fixed panel 25. Coolant inlet hole 35 and outlet port 3
A gasket 37 is arranged around the casing 33 to form a coolant passage B in which the steam passage A, which is appropriately opened to the inner space of the casing 33, is sealed.

In short, according to the present invention, when the both side panels 30, 30 are attached to both sides of the frame body 20 by the fastening means 31.31 when assembling the condenser, the side panels 30, 3
Gasket 32 provided on the inner surface of 0. At the portion 32, the gasket 32 is strongly pressed against the side edge of the plate 34, as shown in FIG.

Therefore, since the gasket 32 is positively and strongly pressed against the plate 34, there is no gap between the casing 33 and the plate 34, and a complete seal can be achieved.

Although the above description is based on an embodiment in which the present invention is applied to a condenser, the present invention is not limited to condensers and can be applied to a wide range of plate heat exchange apparatuses.

As explained above, the plate heat exchanger of this invention is
a casing having a supply port and a discharge port for one fluid, and a supply port and a discharge port for the other fluid, disposed within the casing and open to the casing internal space between the supply port and the discharge port for the one fluid; A plurality of plates overlapped to alternately form a flow path communicating with the discharge port and a flow path closed to the casing internal space and communicating with the other fluid supply port and the discharge port; and a gasket fixed to the entire inner surface of the side panel, and by tightening the side panel, the gasket is attached to the side edge of the plate. Since the plate and the casing are crimped to form a seal between the plate and the casing, short paths of gas between the plate and the casing can be prevented, and therefore heat transfer efficiency can be improved.

In addition, assembly and disassembly are easy, maintenance is easy, and the casing can be downsized, making it possible to downsize the entire device.

[Brief explanation of the drawing]

1 to 3 are drawings showing a plate-type heat exchanger that the present applicant previously applied for, in which FIG. 1 is a partially sectional side view, FIG. FIG. 3 is a longitudinal sectional view of the liquid passage. 4 to 7 are drawings showing a plate heat exchanger according to the present invention, in which FIG. 4 is a side view thereof, FIG. 5 is a longitudinal cross-sectional view of the gas passage, and FIG. 6 is a cross-sectional view. , Figure 7 is the fifth
It is an enlarged sectional view in the figure CC line. A... Steam passage, B... Cooling liquid passage,
20... Frame body, 21... Upper panel,
22... Steam supply port, 23... Lower panel, 24... Condensate discharge port, 25...
・Fixed panel, 26...Cooling liquid supply port, 27・
... Cooling liquid outlet, 28 ... Moving panel, 29 ... Fastening means, 30, 30 ...
side panel, 31, 31... fastening means, 32,
32...Gasket, 33...Casing, 34...Plate, 35...Cooling liquid inlet, 36...Cooling liquid outlet , 37...
····gasket.

Claims (1)

[Claims] 1 A casing having a supply port and a discharge port for one fluid and a supply port and a discharge port for the other fluid, the supply port for the one fluid being marked in the casing and open to the casing internal space between them. and a plurality of plates superimposed to alternately form a flow path communicating with the discharge port and a flow path closed to the casing inner space and communicating with the other fluid supply port and the discharge port, and a side surface of the casing. and a gasket fixed to the entire inner surface of the side panel, and by tightening the side panel, the gasket is attached to the side edge of the plate. A plate type heat exchange device characterized in that the plate and the casing are crimped to form a seal between the plate and the casing.