JPH0619202B2 - Pulse combustion boiler - Google Patents

Description

TECHNICAL FIELD The present invention relates to a compact and highly efficient pulse combustion boiler using a pulse combustion burner.

(Prior Art) In recent years, a pulse combustion boiler has been drawing attention from the viewpoint of energy saving of the boiler, but a combustion chamber, a tail pipe, and a decatupler are required as constituent elements in order to perform stable combustion due to the characteristics of pulse combustion.

Conventionally, as shown in Fig. 2, the combustion chamber (6), the tail pipe (7), and the decatupler (10) were sequentially connected and connected, and the whole was installed in the can body and used as a water-cooled heat transfer surface or withstand pressure. Since the decatupler is provided outside of the can body by design, a volume equivalent to that of the decatupler itself is required for stable combustion, and therefore, the entire apparatus becomes large in size and heat loss increases.

Therefore, it is impossible to keep up with the miniaturization of boilers due to the rapid progress of boilers equipped with conventional burners that do not require a decatpuller, and the spread of pulse combustion boilers has been hindered.

(Problems to be solved by the invention) In view of the above, the present invention goes without saying that stable pulse combustion can be obtained in the pulse combustion type boiler.
Provided a pulse combustion type boiler that can downsize the entire device, (b) reduce the installation space, (c) quickly evaporate due to the small amount of water held, and (d) further improve thermal efficiency. The purpose is to do.

(Means for Solving the Problem) The present invention has finally been completed as a result of intensive studies by the present inventors in order to achieve the above-mentioned object.
A pulse-combustion boiler with a water-cooled double-pipe structure of a tail tube or combustion chamber, a tail tube, and upper and lower headers inserted inside the decatupler of the pulse combustion boiler whose main components are the tail tube and decatupler. .

In this case, the inner pipe is the tail pipe (7), and in order to water-cool the tail pipe (7), a water pipe (8) is provided as an outer pipe to form a double pipe structure, and the annular portion serves as a water-cooling unit. The water-cooled double pipe structure of the tail pipe may be composed of a straight pipe, a spiral pipe or a finned pipe as the inner pipe, and the outer pipe may be a finned pipe such as a stud or the like. Alternatively, one or more sets of water-cooled double pipes may be provided vertically in the decapsulator, and the water-cooled cooling section of the double pipe may be connected to upper and lower headers inside the decatupler.

(Example) Next, this invention is demonstrated with reference to drawings.

FIG. 1 shows a schematic vertical cross-sectional view of an embodiment of the present invention. The combustion chamber (6) includes a starting fan (1), an air valve (2), and a fuel gas valve (4) necessary for a pulse combustion burner. ), A spark plug (3) is connected and arranged via a premixing chamber (5).

The combustion chamber (6) is attached to the lower header (9), and the tail pipe (7) connected to it rises vertically upward through the water pipe (8).
Descends through the upper header (11) in communication with the water pipe (8),
It is connected at its lower end to a decats puller (10) which surrounds the outside.

In this case, because of the size of the combustion chamber (6) and the diameter of the tail pipe (7), there is an optimum tail pipe length for obtaining stable pulse combustion, and accordingly, the tail pipe (7) is designed. The bending of the and the height of the decapsulator (10) are determined from the required device height.

Furthermore, the cross-sectional area of the Decatur (10) is
It must be more than 35 times, which will determine the space of the device.

The combustion gas explosively combusted in the combustion chamber effectively heats the water by the pulsating flow of the combustion gas while passing through the tail pipe, and the exhaust gas having a low temperature fills the decatupler. The filled combustion gas is further heated through the external finned tube.

FIG. 1 shows the case of application to the above-mentioned boiler, and in a hot water boiler or a forced circulation steam boiler, a water-cooled double pipe may be mounted horizontally or inclined in the decatupler.

Although the combustion chamber (6) is arranged in the lower header (9) in FIG. 1, the present invention is not limited to this. For example, the combustion chamber (6) is designed upward, and the lower header is arranged. It is also possible to configure the as an upper head.

Figure 2 shows the combustion chamber of a conventional pulse combustion type boiler (6) Tail tube
(7), a principle view showing the arrangement of the decatching puller (10), FIGS. 3 and 4 are other embodiments of the present invention, FIG. 5 is FIG.
FIG. 4 shows a cross sectional view of FIG.

(Effects of the Invention) The present invention does not separately arrange the combustion chamber, the tail tube, the decapsulator, and the upper and lower headers in space like the conventional pulse combustion type boiler, but first, the tail tube or the tail tube in the decatupler. Since the tail tube, the combustion chamber and the upper and lower headers are inserted and arranged, a compact size and space saving are achieved.

Secondly, since the double pipe is used, the amount of water held is small and evaporates quickly.

Thirdly, there is a number of advantages that high efficiency can be obtained because heat is effectively absorbed not only from the tail pipe but also from combustion gas accumulated in the decatupler.

[Brief description of drawings]

FIG. 1 is a schematic vertical cross-sectional view of an embodiment of the present invention, FIG. 2 is a principle diagram showing the arrangement of a combustion chamber, a tail pipe, and a decatupler of a conventional pulse combustion type boiler, and FIGS. Another embodiment of the invention, FIG. 5 is a cross-sectional view of FIGS. 1 and 4 of the present invention. In FIG. 5, the inner pipe is the tail pipe (7), and the tail pipe (7) is water-cooled. A water pipe (8) is provided as an outer pipe to form a double pipe structure, and an annular part of the double pipe structure is used as a water cooling / cooling part. 1 ... Juan 2 ... Air valve 3 ... Spark plug 4 ... Fuel gas valve 5 ... Premixing chamber 6 ... Combustion chamber 7 ... Tail tube 8 ... Water tube 9 ... Lower head 10 ... Decaturer 11 ...... Upper header 12 …… Exhaust gas outlet 13 …… Fuel gas inlet 14 …… Air inlet

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yoshio Hayashi, 1-9-36, Oyodokita, Oyodo-ku, Osaka-shi, Osaka (72) Inside Hirakawa Iron Works Co., Ltd. (72) Yoshiharu Ueda, 1-chome, Oyodo-kita, Osaka-shi, Osaka No. 9-36 Hirakawa Iron Works Co., Ltd. (72) Inventor Takashi Matsuzaka 336 Tatehara, Fuji City, Shizuoka Prefecture, Toshiba Fuji Factory (72) Inventor Toshihiko Saito 336 Tatehara, Fuji City, Shizuoka Prefecture, Fuji Factory, Toshiba ( 72) Inventor Satoshi Kuoka 336 Tatehara, Fuji City, Shizuoka Prefecture, Toshiba Corporation Fuji Factory (72) Inventor Kazushi Watanabe 629 Endo, Fujisawa City, Kanagawa Prefecture (72) Inventor Koki Takahashi 1-48, Higashiikebukuro, Toshima-ku, Tokyo 6 (56) Bibliographic references Sho 59-186601 (JP, U)

Claims (1)

[Claims] A decoupler (10) for a pulse combustion type boiler having a combustion chamber (6), a tail pipe (7) and a decoupler (10) as main components.
A tail pipe (7) having a water-cooled double pipe structure or a combustion chamber (6) and a tail pipe (7) are inserted and disposed inside the tail pipe (7) having the water-cooled double pipe structure.
However, in the decoupler (10), the inner pipe is constituted by a straight pipe, a spiral pipe or a finned pipe, the water pipe (8) of the outer pipe is a studded or finned pipe, and the water-cooled double pipe is in the vertical direction. One or a plurality of sets are provided in the upper and lower headers (11) and (11) of the decoupler (10).
A pulse combustion type boiler characterized by being connected to (9).