JPS645203B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a granule combustion furnace that continuously burns combustible pieces (granules) such as rice husks and sawdust, and generates hot air from the heat.

BACKGROUND OF THE INVENTION In general, this type of granular combustion furnace generally consists of an upper combustion tube, a lower combustion tube, and a machine room. Conventionally, the upper combustion tube has been formed integrally with the lower combustion tube and the machine room from the beginning, so the shape of the upper combustion tube has not been changed depending on the purpose of using the hot air. Therefore, in order to change the purpose, the only option was to replace the device itself.

In order to deal with this, a method has been proposed as Utility Model Application Publication No. 56-66644 in which a combustion furnace body is constructed by connecting multiple members together with bolts. When I left,
There was a drawback that the combustible materials and ash inside the lower member were exposed and could separate from the member and pollute the environment.

Problems to be Solved by the Invention Therefore, the present invention seeks to provide a combustion device that does not pollute the environment during attachment and detachment work of the combustion tube.

Means for Solving the Problems The particulate combustion furnace of the present invention has an upper combustion tube configured separately from a lower combustion tube, the upper combustion tube can be freely attached to the lower combustion tube, and the upper combustion tube is attached to the lower combustion tube in the center. It has a structure characterized by having a central porous wall body which is recessed into a cylindrical shape and whose lower part is conical.

Example Embodiments of the present invention will be described based on the drawings.

FIG. 1 is a cross-sectional view of one embodiment of the present invention, in which a combustion furnace 1 roughly consists of an upper combustion tube 2, a lower combustion tube 3, and a machine room 4, and the upper combustion tube 2 has a lower combustion tube 3.
and the upper combustion tube 2, which is made separately from the machine room 4.
The flange 5 provided below the lower combustion tube 3
The upper combustion tube 2 is connected to a flange 6 provided above by bolts 7 and nuts 8, and the upper combustion tube 2 is detachably fixed on the lower combustion tube 3.

The upper combustion tube 2 shown in FIG. 1 is of the type that uses hot air directly, and consists of a secondary combustion chamber 9 in the center, a hot air outlet duct 10 on the side, and a short pipe 11 and a relief valve 12 on the upper side. Each is provided.

The lower combustion cylinder 3 includes an inner cylinder 13 whose center is recessed into a cylindrical shape and whose lower part is conical, and a circumferential porous wall 1.
4, a conical outer peripheral porous wall 15 with a predetermined distance from the inner cylinder 13, and an annular air blowing passage 1 on the upper outer peripheral position of the multi-peripheral porous wall 15.
6. A porous bottom plate 17 is located below the outer peripheral porous wall 15.
has been established. The inner cavity of the inner cylinder 13 is a primary combustion chamber 18, the space between the inner cylinder 13 and the outer peripheral porous wall 15 is a rice husk fumigation chamber 19, and the outer peripheral porous wall 15 and the porous bottom plate 1.
A ventilation chamber 20 is formed between each of the sections 7 and 7.
Further, a cyclone 21 is connected to the side of the fumigation chamber 19.

The machine room 4 includes an annular ventilation passage 16 and a ventilation chamber 20.
It is composed of a blower 22 communicating with the air blower 22 , a pressure feed pipe 24 having a conveyance spiral 23 inside thereof, and a motor 25 that drives the conveyance spiral 23 . In addition, 2
Reference numeral 6 denotes a chute for supplying rice husks to the lower side of the pressure feed pipe 24.

When the power is turned on, the motor 25 and blower 22
is driven. Rice husks are then supplied from the chute 26 and sent upward by the conveying spiral 23 to fill the fumigation chamber 19. When the rice husks in the upper part of the fumigation chamber 19 are ignited here, almost the entire area of the fumigation chamber 19 becomes high temperature, combustible gas is liberated from the rice husks inside, and the first
The air enters the primary combustion chamber 18 and the secondary combustion chamber 9 on the flow of air from the blower 22 indicated by arrows in the figure. In these combustion chambers 18, 9, the combustible gas obtains sufficient oxygen and is completely combusted, and the air flow becomes hot air. The hot air in the secondary combustion chamber 9 is sent to a paddy dryer, a greenhouse, etc. through an outlet duct 10.

The rice husks in the fumigation chamber 19 are pushed up from below by new rice husks fed in by the conveying spiral 23 and gradually move upward, and by the time they reach the upper end, they have already turned into ash that has released combustible gas. The ash is carried to the cyclone 21 by the swirling air flow blown out from the upper plate of the annular air passage 16 and is separated from the air, so that it does not reach the secondary combustion chamber 9. Such a combustion process is carried out continuously.

FIG. 2 shows another embodiment of the present invention, in which the upper combustion tube 2
is a heat exchange type, and as in the previous embodiment, the machine room 4
It is formed separately from the lower combustion tube 3, is located above the lower combustion tube 3, and is detachably fixed by a fixing means. A large number of pipes 27 are arranged inside the secondary combustion chamber 9 of the upper combustion tube 2.
A hot air outlet duct 29 having a suction fan 28 is provided on one side, and an intake port 30 for taking in air is provided on the other side.

In the primary combustion chamber 18 and the secondary combustion chamber 9, the combustible gas obtains sufficient oxygen and is completely combusted, raising the temperature of the air in the installed pipe 27 and turning it into hot air.
The suction fan 28 sends it to a paddy dryer or the like for use. This heat exchange type has slightly lower thermal efficiency than the type that uses hot air directly, but since it uses fresh air, it is used when you want to use clean hot air.

Effects of the Invention As described above, according to the present invention, since the upper combustion tube is constructed separately from the lower combustion tube and can be attached freely, it is easy to change the shape of the upper combustion tube depending on the purpose of using hot air. In addition, due to the central porous wall provided in the lower combustion tube, the center of which is recessed to form a cylindrical shape and the lower part of which is conical, the secondary combustion chamber in the upper combustion tube is filled with rice husks and hot gas. The ash from the rice husks released does not reach the combustion chamber, so even if the upper combustion tube is separated from the lower combustion tube, it will not pollute the environment.

Additionally, in the manufacturing process, machining and assembly become easier, improving manufacturing efficiency.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of one embodiment of the invention, and FIG. 2 is a longitudinal sectional view of another embodiment of the invention. 1... Combustion furnace, 2... Upper combustion tube, 3... Lower combustion tube, 4... Machine room, 5, 6... Flange, 7
...Bolt, 8...Nut, 9...Secondary combustion chamber,
10, 29...Hot air outlet duct, 18...Primary combustion chamber, 19...Fumigation chamber, 20...Blower chamber, 21...
... cyclone, 22 ... blower, 23 ... conveyance spiral, 24 ... pressure pipe, 31 ... central porous wall.

Claims (1)

[Claims] 1. In a particulate combustion furnace consisting of an upper combustion tube and a lower combustion tube, the upper combustion tube is configured separately from the lower combustion tube so that the upper combustion tube can be attached to the lower combustion tube, and the lower combustion tube A granular material combustion furnace characterized in that a combustion cylinder is provided with a central porous wall body having a cylindrical shape with a recess in the center and a conical lower part.