JPS625590Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a heat exchanger.

A general example of a heat exchanger is shown in FIG. That is, 1 is a body part, a first fluid supply part 2 is attached to one end thereof, and a first fluid discharge part 3 is attached to the other end. The first fluid supply section 2 is provided with a first fluid inlet 4, and the second fluid discharge section 3 is provided with a first fluid outlet 5. A second fluid inlet 6 is provided at the other end of the body 1, and a second fluid inlet 6 is provided at one end.
A fluid outlet 7 is provided. The first fluid supply section 2
A tube plate (not shown) is disposed in each of the first fluid discharge portion 3 and the first fluid discharge portion 3, and a large number of heat transfer tubes 8 whose both ends are supported by these tube plates are disposed in the body portion 1. Each heat exchanger tube 8 is held through a plurality of baffle plates 9 disposed within the body 1.

According to the heat exchanger having the above configuration, the second fluid flows perpendicularly to the heat exchanger tubes 8, and therefore a Karman vortex A is generated on the downstream side of the heat exchanger tubes 8 as shown in FIG. Dust (dirt) B contained in the second fluid (exhaust gas, etc.) will adhere to the downstream surface. Incidentally, dirt on the heat exchanger is generally not a problem since the inside of the heat exchanger tube 8 can be easily cleaned from the supply section 2 or the discharge section 3 side, but dirt inside the body section 1 is not a problem when the tube handle is pulled out. This is a difficult process as jet cleaning is required afterwards. Therefore, it is preferable that the heat exchanger tubes 8 not be contaminated as described above.

In the present invention, a plurality of buttful plates are arranged in the body to insert and hold a number of heat transfer tubes, and a number of heat transfer tubes are provided near the heat transfer holding part of the buttfull plate, which are inclined so as to face the lower heat transfer tube part. The present invention proposes a heat exchanger characterized by having a through hole, and according to this configuration, a part of the fluid flowing inside the body is flowed in a jet form onto the surface of the lower heat tube section through the through hole. This disturbs the flow of fluid on the surface of the heat exchanger tube, thereby preventing dust from adhering to the surface of the heat exchanger tube, and also allowing the adhering dust to be removed.

Hereinafter, one embodiment of the present invention will be described based on FIGS. 3 to 5. 10 is a body, 11 is a baffle plate, and 12 is a heat exchanger tube. A large number of through holes 13 (in the embodiment, four near one holding portion) are provided near the heat exchanger tube holding portion of the baffle plate 11, and these through holes 13 are inclined to face the lower heat transfer tube portion. is in the form of a tipped nozzle.

Therefore, a part of the fluid flowing inside the body 10 is injected toward the surface of the lower heat transfer tube portion through the through hole 13, thereby changing the main flow that is flowing perpendicularly to the heat transfer tube 12 into an inclined flow. At the same time, the Karman vortex that is about to occur on the lower outer surface of the heat exchanger tube 12 is eliminated. Furthermore, the jet flow is
to remove dust that tends to adhere to the outer surface of the

According to the present invention having the above configuration, a part of the fluid flowing inside the body is made to flow in a jet shape onto the surface of the heat exchanger tube through the through hole, which disturbs the flow of the fluid on the surface of the heat transfer tube and removes dust. It is possible to prevent the adhesion of dust and remove the adhering dust. This reduces the number of times the interior of the body is cleaned, which is a difficult task, and extends the cleaning interval.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view showing a general example of a heat exchanger, Fig. 2 is a longitudinal sectional side view of the main part showing the state of dust adhesion, and Figs. 3 to 5 show an embodiment of the present invention. , FIG. 3 is a longitudinal sectional front view of the main part, FIG. 4 is an enlarged longitudinal sectional front view of the main part, and FIG. 5 is a side view of the same. 10...Torso, 11...Bassful plate, 1
2... Heat exchanger tube, 13... Through hole.

Claims (1)

[Scope of utility model registration request] A plurality of buttful plates are arranged in the body to insert and hold a number of heat transfer tubes, and a number of through holes are provided in the vicinity of the heat transfer tube holding portion of the buttfull plate so as to face the lower heat transfer tube portion. A heat exchanger characterized by: