JPS5945909B2 - rotary heat exchanger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION In order to effectively recover the heat contained in waste gas and the like, heat transfer tubes are arranged in a group of tubes and supported rotatably, and the fluid (mainly The present invention relates to a rotary heat exchanger that achieves heat exchange between a gas such as air or waste gas) and a fluid in a heat transfer tube.

In general, discarding high-temperature waste gases such as combustion gas, air, and steam discharged from factories and other equipment is problematic in terms of energy economy and air pollution. It has been proposed to recover waste heat and use it for other purposes.

Conventionally, as a heat exchanger for this purpose, waste gas and heated gas are guided into two partitioned rooms, a rotating disk is installed at the boundary between these two rooms, and a heat pipe is passed through this rotating disk. A structure is used in which heat is exchanged between both gases via a group of rotating heat pipes, but this involves heat loss due to the intermediate heat pipes.

The present invention eliminates such drawbacks of the conventional technology and provides a rotary heat exchanger in which a heating fluid and a fluid to be heated directly exchange heat through a heat transfer tube wall, and in which the heat transfer efficiency is improved. The purpose is to

The present invention provides a plurality of heat exchanger tubes on a rotatably supported tube plate, and while the fluid passes from the center of the tube group to the outer periphery of the heat exchanger tubes, heat is generated between the fluid and the fluid in the heat exchanger tubes. In a rotary heat exchanger in which exchange is performed, the tube plate is supported by a hollow rotating shaft, and the fluid in the heat transfer tube is guided into the heat transfer tube through the hollow flow path of the rotating shaft and the tube plate, and the tube plate is supported by a hollow rotating shaft. The heat exchanger tubes are arranged in rows in the circumferential direction of the rotating tube group, and a row of baffle plates is arranged in the circumferential direction between or outside or inside the rows of heat exchanger tubes, and the row of baffle plates This is a rotary heat exchanger characterized by being held by a rotating plate that can rotate at a speed different from that of the plate.

Embodiments of the present invention will be explained with reference to FIGS. 1 and 2.

In this embodiment, a plurality of heat exchanger tubes 1 are provided on a rotatable tube plate 2, and while the fluid passes from the center of the group of heat exchanger tubes to the outer periphery, heat is generated between the fluid and the fluid inside the heat exchanger tubes 1. A rotary heat exchanger in which exchange is performed, the tube sheet 2 having a hollow rotating shaft 4.
The fluid in the heat exchanger tube 1 is guided into the heat exchanger tube 1 through the hollow flow path 4□ in the rotary shaft 4 and the tube plate 2.

3 is a casing, 30 and 3□ are suction and discharge ports for heating side gas such as waste gas, 5 and 6 are bearings, and 7 is a gas seal portion.

Reference numeral 13' denotes a rotary plate supported by a rotating shaft 4' supported by a bearing 6' and capable of rotating at the same speed or a different speed independently of the tube plate 3, and provided with a large number of baffle plates. The rotary blades 13 are formed by the following steps.

Since the present embodiment is constructed in this way, the fluid to be heated passes through the hollow flow path 4°, passes through the tube plate 2, and enters the heat exchanger tube 1, and the heated gas in the casing 3 and the wall of the heat exchanger tube 1 are heated. Heat exchange is performed directly only through the

At this time, since the heat exchanger tube 1 is rotating, the fluid inside the heat exchanger tube is shaken violently and comes into active contact with the inner surface of the heat exchanger tube, and due to the rotating action of the rotating blades 13, the inflow direction of the heating side stream and others is changed. As a result, the relative speed of the heat transfer tubes 1 with respect to the tube group increases, and heat transfer performance improves.

If the tube plate 2 and rotary plate 13' are rotated in the opposite direction, the relative speed will be further increased and the heat transfer performance will be further improved.

Since the surface of the heat exchanger tube 1 comes into contact with the heated gas at high speed,
Extremely good heat transfer is carried out, and good heat transfer can be carried out both on the inner and outer surfaces of the heat exchanger tube 1, and the heat transfer efficiency is improved.

Incidentally, if a variable mechanism is attached to the rotating blade 13, it becomes possible to set the blade angle suitable for the operating conditions, and both the heat transfer performance and the fan performance can be easily controlled.

Therefore, it is possible to cover a wide range of performance with one model, which has great economical advantages in terms of design and manufacturing.

Further, in the above embodiment, the rotary vanes 13 are provided on the outer and inner circumferences of the rotary tube group, but if necessary, one or both of these may be omitted.

Further, although these embodiments have been described using general heat exchanger tubes, those with fins may also be used.

According to the present invention, the hot exchange between the fluid passing inside and outside of the rotating heat transfer tubes is significantly increased outside the heat transfer tubes, and the heated fluid is directly transferred inside the heat transfer tubes. Moreover, it vibrates violently and makes violent contact with the inner surface of the heat transfer tube, improving the conditions inside and outside the heat transfer tube and increasing heat transfer efficiency, making it possible to greatly improve heat transfer performance and improve fan performance. It is possible to create an economical and easy-to-manufacture rotary heat exchanger that achieves the following, and has extremely great practical effects.

[Brief explanation of drawings]

The drawings relate to an embodiment of the present invention, and FIG. 1 is a longitudinal sectional view, and FIG. 2 is a cutaway front view thereof. 1... Heat exchanger tube, 2... Tube sheet, 3...
...Casing, 31...Intake port, 3□...
...Discharge port, 4... Rotating shaft, 4'...
...rotation axis, 4. ...Flow path, 5, 6, 5', 6
'...Bearing, 7...Gas seal part, 1
3... Rotating blade, 13'... Rotating plate.

Claims (1)

[Claims] 1 A plurality of heat transfer tubes are provided on a rotatably supported tube plate,
In a rotary heat exchanger in which heat is exchanged between the fluid and the fluid in the heat transfer tubes while the fluid passes from the center of the tube group to the outer circumferential portion of the heat transfer tubes, the tube plate is rotated by a hollow rotating shaft. The fluid in the heat transfer tubes is guided into the heat transfer tubes through the hollow flow path of the rotating shaft and the tube plate, and the heat transfer tubes are arranged in rows in the circumferential direction of the rotating tube group. comprising a row of baffle plates arranged in a circumferential direction between or outside or inside the heat tube rows,
A rotary heat exchanger characterized in that the baffle plate array is held by a rotary plate that can rotate at a speed different from that of the tube plate.