JPS60200045A - Pulse burning device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a pulse combustion water heater, a steam boiler, etc. incorporating a pulse combustor applying the principle of a pulse combustion device, etc. Converter (referred to as tail pipe) and second heat exchanger (referred to as heat transfer tube) ft Horizontally or inclined with respect to the horizontal toward the exhaust gas outlet, bent and formed at a position below the combustion chamber. The present invention relates to a pulse combustion device having a similar configuration.

Pulse combustion equipment has the characteristics of energy saving and low pollution, and is highly expected to be put into practical use as a combustion equipment in the future.

The pulse combustion method is a combustion method similar to a two-cycle engine that repeatedly takes in fuel and air, explodes, and exhausts it, and by causing periodic explosive combustion in a small combustion space,
It has the advantage of lower equipment costs, significantly improved heat transfer efficiency, and lower pollution because there are fewer nitrogen oxide (NOx) discharge caps.

Conventionally, various structures have been considered for water heaters or steam boilers that use pulse combustion devices, but when considering the manufacturing, handling, and repair aspects, the combustion system shown in Figure 1 is the best. The simplest method is to configure the exhaust gas exhaust path with vertical straight pipes arranged at one end of the combustion chamber. The drawback is that the entire device becomes long, which poses a problem in repairing the pulse combustor.

In order to correct these drawbacks, it has been considered to bend the combustion exhaust gas exhaust passage vertically and lower the height as much as possible, as shown in Figure 2, but in this case, it becomes a U-shaped pipe. The biggest drawback is that the drain accumulates in some places.In order to eliminate this drawback, a drain outlet is provided below the bent part, and it is connected to the decoupler located at the rear of the tail pipe with a short pipe. If this device is adopted, (a) the drain discharge pipe will become clogged; (b) the tail pipe and main body will expand and contract, stress will be generated in this area, causing damage; (c) a part of the combustion gas will will short-circuit, resulting in poor thermal efficiency. There are drawbacks such as, and the current situation is that management is extremely difficult.Also, as mentioned above, as a drawback, even if the pulse combustor is lowered by bending it up and down, 9, which is extremely problematic in terms of the replacement life of the equipment.

That is, as shown in Fig. 1, the combustion chamber exists above and there is fluid around it, but with this structure, air bubbles exist above the outer cylinder and the temperature is high. As a result, the temperature of the outer wall surface of the combustion chamber increases, resulting in a shortened service life.In view of the above-mentioned drawbacks of the conventional pulse combustion device, the present invention provides a pulse combustion device that is further improved by eliminating the drawbacks of As a result of extensive studies, the present invention has been completed with the aim of providing a pulse combustor. In the history of fuel supply systems, both air and fuel premixers are installed outside the fluid heating body (referred to as the outer cylinder).
The air and fuel mixed in the premixer are supplied to the combustion chamber, and the tail pipe and heat transfer tube connected to the rear end of the combustion chamber are connected to the exhaust gas outlet horizontally or horizontally at a position below the combustion chamber. This is a pulse combustion device in which the combustion chamber and the tail pipe are housed in an outer cylinder filled with a fluid to be heated. This provides advantages in handling, and all heat transfer surfaces including the combustion chamber are constantly immersed in the fluid to be heated, so there is no fear of overheating.

Furthermore, the present invention will be explained with reference to the drawings.The present invention will be explained below with reference to the drawings.

3(a) and 3(B) are schematic cross-sectional views of an embodiment of the invention, in which FIG. 3(4) is a cross-sectional view and FIG. 3(B) is a vertical cross-sectional view, showing the air supply device tb+, fuel supply device ( 6) Air and fuel gas are respectively supplied to the premixer +1) and mixed, and then the mixed gas is combusted in the combustion chamber (2) inside the outer cylinder (4). guided to the tail tube (3) located at the end,
Furthermore, the combustion gas passes through a large tube 9- (71) and a heat exchanger tube (9).
9) and is discharged out of the system. The tail pipe (3) and the heat transfer tube (9) may be bent horizontally on the left and right as shown in Figure 3, or bent horizontally as shown in Figure 4 (see Figure 4). (7) is a decoupler;
) is the second heat exchanger (heat exchanger tube) 0 The present invention not only allows drain condensed in the tail pipe or heat exchanger tube to be discharged outside the outer cylinder without difficulty, but also allows the premixer for air and gas to be installed outside the outer cylinder. Since the tail pipe and heat transfer tube are bent, the tail pipe and heat transfer tube are compactly placed inside the outer cylinder, and the volume of the outer cylinder is reduced accordingly. Accordingly, it has many advantages, such as being able to be made smaller and increasing heat exchange efficiency.

Note that the tail pipe and the heat transfer pipe may be arranged in such a way that one is horizontal and the other is arranged at an angle with respect to the horizontal, and this combination may be arbitrarily selected depending on the exhaust gas temperature of each r.

[Brief explanation of drawings]

Figures 1 and 2 are a pulse combustion device in which conventional heat exchangers are arranged above and below, Figure 3 is a cross-sectional view of an embodiment of the pulse combustion device of the present invention, and The longitudinal cross-sectional view. FIG. 4 shows a schematic cross-sectional view of an embodiment in which the first and second heat exchangers are inclined toward the exhaust gas outlet. 1. Premixer 2, Combustion chamber 3.3' First heat exchanger (tail pipe) 4. Fluid heating chamber 5, Air supply device 6, Fuel supply device 7, Decoupler 8, Exhaust silencer 9, Second heat exchanger Container (heat transfer tube) Tokyo Shibaura Electric Co., Ltd. Patent applicant Tokyo Gas Co., Ltd. Hirakawa Iron Works Co., Ltd. Continued from page 1 Akira Hisaoka @ Inventor Kozo Sakurai 1-9-36 Oyodokita, Oyodo-ku, Osaka City, Hirakawa Iron Works Co., Ltd.

Claims (1)

[Claims] In a pulse combustion device incorporating a pulse combustor, an air and fuel supply device as well as a premixer for air and fuel are both provided outside the fluid heating body (referred to as an outer cylinder), and the air and fuel are mixed in the premixer. Air and fuel are supplied to the combustion chamber, and a first heat exchanger (referred to as a tail pipe) and a second heat exchanger are connected to the rear end of the combustion chamber.
A heat exchanger (referred to as a heat transfer tube) is placed horizontally or tilted toward the exhaust gas outlet with respect to the horizontal at a position below the combustion chamber, and is bent in the vertical direction, so that the heat exchanger is A pulse combustor device in which a heat tube and a heat tube are housed in an outer cylinder filled with a fluid to be heated.