JPH0156115B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rice husk combustion furnace, and particularly to a raw material supply device for a rice husk combustion furnace.

[Conventional technology]

Conventionally, a rice husk combustion furnace for producing smoked charcoal (burnt fertilizer) by carbonizing rice husks is known from Japanese Utility Model Application Publication No. 51-87652 and the like.

[Problem that the invention seeks to solve]

By the way, in conventional rice husk combustion furnaces, the rice husks introduced from the upper raw material supply hopper flow down into the smoking chamber and are carbonized, but the rice husks are not uniformly supplied into the smoking chamber and carbonization occurs. There was a problem that unevenness occurred.

In view of the above problems, the technical object of the present invention is to provide a raw material supply device for a rice husk combustion furnace that does not cause uneven carbonization.

[Means to solve the problem]

To explain the means for achieving this object using FIGS. 1 and 2 corresponding to the embodiment, the present invention has a rice husk smoking chamber 5, a primary combustion chamber 2, a secondary combustion chamber 16, In a rice husk combustion furnace equipped with a blower 23 that blows air from below toward the rice husk smoking chamber 5, in a rice husk combustion furnace equipped with a blower 23 that blows air from below toward the rice husk smoking chamber 5, The smoking chamber 5 is located between the outer peripheral edge of the 5 and the outer cylinder 7.
A floor wall 9 that slopes to the side is provided around the periphery, and the lower side of the floor wall 9 and the blower 23 are communicated through a blowing path 22. Further, the outer cylinder 7 is provided with a raw material supply port 12 for supplying the raw material onto the floor wall 9 and a raw material supply gutter 15 tangentially connected to the supply port 13. Further, the floor wall 9 is provided with a large number of oblique air holes 21 so that the raw material rice husks fed from the raw material supply port 13 and the rice husks are evenly supplied into the rice husk combustion furnace 5 while being rotated.

[Action and effect]

The raw material rice husks that are tangentially supplied onto the floor wall 9 through the raw material supply gutter 15 and the raw material supply port 13 are
The rice husks are evenly supplied into the rice husk smoking chamber 5 while being scattered in a swirling manner by the wind blown up from the oblique air holes 22 formed on the surface.

The rice husks evenly supplied into the rice husk smoking chamber 5 in this way are carbonized uniformly and evenly and are sequentially taken out of the machine from the lower end of the rice husk smoking chamber 5. The new raw material rice husks floating from above and scattering in a swirling manner fall and accumulate evenly and continuously, so that uniform carbonization can be achieved, and the temperature of the high-temperature part in the upper layer of the rice husks smoking chamber 5 can be appropriately suppressed. It can prevent rice husks from turning white.

[Embodiments of the invention]

Hereinafter, a preferred embodiment of the present invention will be described based on the drawings. A cylindrical air passage 22 is formed along the lower inner wall of the outer circumferential tube 7 that is erected, and a blower 23 is connected to an arbitrary location on the bottom wall of this air passage 22. Furthermore, a porous wall inner cylinder 1 and a porous wall outer cylinder 6 each formed in a lower funnel shape are provided in the air passage 22, and the inside of the porous wall inner cylinder 1 is formed into a primary combustion chamber 2. Make the upper end the flame hot air outlet 3. Moreover, a rice husk smoking chamber 5 is formed between the cylinders 1 and 6, and the lower end thereof is a smoky charcoal discharge port 10, which is connected to the transport cylinder 1, and the transport tube A vertical helical body 11 is erected within the body 12 and is driven by a rotating device 12 .

The upper end of the vertical spiral body 11 faces into the ash outlet 4 opened at the bottom of the porous wall inner cylinder 1, and is connected to a partition wall 8 provided horizontally around the periphery of the porous wall inner cylinder 1 and the flame hot air outlet 3. Therefore, it is fixed to the inner wall of the outer cylinder 7.
Furthermore, a cylinder erected on the partition wall 8 forms a secondary combustion chamber 16 above the flame hot air port 3 . On the other hand, the outer cylinder 7 surrounding the secondary combustion chamber 16 is provided with an outside air intake window 18 equipped with a control valve 17 and a hot air exhaust port 19 equipped with an exhaust fan 20. The outlet 19 is the secondary combustion chamber 1
It communicates with the secondary combustion chamber 16 through a porous portion provided near the cylinder forming the combustion chamber 6.

At the upper end of the air passage 22, that is, between the outer peripheral edge of the rice husk smoking chamber 5 and the outer cylinder 7, a floor wall 9 having a perforated wall inclined toward the center is provided around the entire circumference. A dot-shaped void surrounded by the wall 9, the partition wall 8, the outer cylinder 7, and the porous wall inner cylinder 1 is formed in the raw material supply chamber. In order to supply raw materials to this supply chamber, a raw material supply gutter 15 equipped with a screw conveyor driven by an electric motor 25 and a supply hopper 14 is installed tangentially to the raw material supply port 13 provided in the outer cylinder 7 of the raw material supply chamber. Connect to. Furthermore,
The porous wall of the floor wall 9 is formed by a large number of oblique air holes 21 oriented in a direction in which the raw material fed from the raw material supply port 13 swirls forward and diagonally upward toward the center. Further, the blower 23 is communicated with the lower part of the porous wall outer cylinder 6 through an air passage.

This supplies rice husks, which are the raw material, to the hopper 1.
4, the rice husks are fed onto the inclined wall 9 of the raw material supply chamber by the raw material supply gutter 15, and
The wind ejected from the oblique air hole 21 blows the rice diagonally forward and upward, swirls around the raw material supply chamber, and evenly falls and is supplied into the rice husk smoking chamber 5. On the other hand, the wind generated by the blower 23 branches from the air passage 22, passes through the rice husk smoking chamber 5 from below the rice husk smoking chamber 5, blows up into the primary combustion chamber 2, and blows up into the primary combustion chamber 2, causing the rice husk smoking and burning. The rice husk layer in the chamber 5 is smoldered at a low temperature, and the unburned gas generated at this time is combusted in the primary combustion chamber 2 and completely combusted in the secondary combustion chamber 16. This hot air is then used in a grain dryer (not shown) as clean hot air that does not contain ash.

In addition, the raw material rice husks fed from the raw material supply port 13 are preheated by the heat in the upper layer of the rice husk smoking chamber 5 while floating and swirling by the jet from the oblique air hole 21, and the moisture content of the raw materials is reduced. Even if the temperature is high, it can be supplied without separate drying treatment. and,
The raw material rice husks that fall and are supplied to the upper surface of the rice husk smoking chamber 5 can appropriately control the temperature of the upper layer of the rice husk smoking chamber 5 and prevent the rice husks from turning into white ash.

The rice husks carbonized in the rice husk smoking chamber 5 in this way are
are sequentially taken out of the machine by the hard shaft spiral body 11,
At this time, the ash and the like accumulated at the bottom of the primary combustion chamber 2 are also removed from the ash outlet 4 by the vertical spiral body 11.

[Brief explanation of drawings]

FIG. 1 is a side sectional view of an embodiment of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a side sectional view of a second embodiment. 1... Porous wall inner cylindrical body, 2... Primary combustion chamber, 3... Flame hot air port, 4... Ash extraction outlet, 5... Paddy side smoldering chamber, 6...
Porous wall outer cylinder, 7... Outer cylinder, 8... Partition wall, 9... Floor wall, 10... Smoky charcoal outlet, 11... Vertical spiral body, 12
...transport cylinder, 13...raw material supply port, 14...supply hopper, 15...raw material supply gutter, 16...secondary combustion chamber, 1
7... Control valve, 18... Outside air intake window, 19... Hot air outlet, 20... Exhaust fan, 21... Diagonal air hole, 22... Air duct, 23... Air blower, 24... Rotating device, 25... Electric motor.

Claims (1)

[Scope of Claims] 1. A porous wall inner cylinder 1 and a porous wall outer cylinder 6 each having a funnel-shaped lower end are provided in an upright outer peripheral cylinder 7, and the space between these cylinders 1 and 6 is filled with rice husk. A smoking chamber 5 is formed, the inside of the porous wall inner cylinder 1 is formed as a primary combustion chamber 2, and the upper part thereof is formed as a secondary combustion chamber 16, and a blower 23 is provided to blow air from below toward the rice grain smoking chamber 5. In the rice husk combustion furnace, a floor wall 9 inclined toward the grain smoking chamber 5 side is provided between the outer peripheral edge of the upper end of the rice husk smoking chamber 5 and the outer circumferential tube 7, and Below is the blower 2.
3, forming an air blowing passage 22 that communicates with the outer cylinder 7.
A raw material supply port 13 for supplying raw materials onto the floor wall 9 and a raw material supply gutter 1 tangentially connected to the supply port 13 are provided.
The rice husk is characterized in that the floor wall 9 is further provided with a large number of oblique air holes 21 so that the raw material rice husk sent from the raw material supply port 13 is swirled and evenly supplied into the rice husk smoking chamber 5. Combustion furnace raw material supply device.