JPH0512567Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a pipe combustion device used for saunas, heating, and other various heating applications.

(Prior Art) As shown in Fig. 1, a typical conventional pipe combustion device has a burner section on one side of the pipe, burns fuel in the burner section, and releases fuel gas to the other side of the pipe. During the process, the pipe was heated and combustion gas was discharged from the other side of the pipe. In addition, Jikko 58
Radiant tubes using catalysts as shown in No. 55291 of 2013 and Utility Model Application Publication No. 44530 of 1972 have also been proposed, but these are still insufficient as a means to make the temperature distribution uniform in the longitudinal direction. In addition, in the conventional technology, even if combustion is devised such as by making combustion occur gradually, the pipe wall near the burner section inevitably becomes hot, resulting in an overall temperature difference that is too large. The point was hot. The present invention is intended to solve these problems, and will be detailed below with reference to the drawings.

(Means for solving the problem) Reference numeral 1 denotes a second supply pipe having supply holes 2 provided in multiple stages in the longitudinal direction, and the second supply pipe 1 is inserted into the first supply pipe 3. In addition, the first supply pipe 3 is filled with a catalyst member 4. The catalyst member 4 may be, for example, particulate or square.

(Function) In the above configuration, for example, fuel gas is introduced from the gas introduction section 5 and air is introduced into the air introduction section 6.
When introduced, combustion starts in the flame holding section 7. Since such combustion is an initial combustion for heating the catalyst member 4, the amount of combustion may be small, but sufficient air necessary for complete combustion is introduced. When the catalyst member 4 is sufficiently heated by the initial combustion, the introduction of air from the air introduction part 6 is stopped, and the fuel gas or the air-deficient mixture is passed from the gas introduction part 5 to the first supply pipe 3. to be introduced within. At this time, if air is simultaneously ejected in small quantities from the air introduction hole 2 of the air introduction pipe 1 in multiple stages, combustion commensurate with the amount of air proceeds in multiple stages in the catalyst. The above is just an example of staged combustion, and it goes without saying that the fluid introduced into the first and second supply pipes may be an appropriate combination of fuel, air, and either an excess combustion mixture or an excess air mixture.

(Effects of the invention) As described above, in the present invention, combustion proceeds in multiple stages within the pipe, so local heating of the pipe can be avoided, and the temperature distribution in the longitudinal direction of the pipe can be made uniform. This has the great advantage of promoting combustion and stabilizing combustion.

[Brief explanation of the drawing]

FIG. 1 is a schematic illustration of a conventional pipe combustion device, and FIG. 2 is a schematic cross-sectional illustration of the present invention. Code 1...first supply pipe, 2...supply hole,
3... Second supply pipe, 4... Catalyst member, 5...
...Fuel introduction part, 6...Air introduction part, 7...Flame holding part.

Claims (1)

[Scope of utility model registration request] A second supply pipe having supply holes provided in multiple stages in the longitudinal direction is inserted into the first supply pipe, and the first supply pipe is filled with a catalyst member to perform catalytic combustion in multiple stages. A pipe combustion device characterized by: