JPS6363801B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a granule combustion device that uses swirling flow to burn granules such as rice husks, and in particular, it automatically and continuously burns granules such as rice husks so that the granules can be stored in the combustion chamber. The present invention relates to a granular combustion device that can automatically centrifuge and remove combustion residue using a cyclone effect and extract high-temperature combustion exhaust that does not contain solid combustion residue and can be used for drying grains, etc.

Embodiments of the present invention will be described below with reference to the drawings.

A granule combustion device according to the invention is indicated generally by the number 1. The granular combustion device 1 includes an outer cylinder 2 serving as an outer wall forming a combustion chamber 5, an inner cylinder 9 disposed inside the outer cylinder 2, and an inner cylinder 9 located between the outer cylinder 2 and the inner cylinder 9, one end of which is connected to the outer cylinder 2. It consists of an intermediate partition cylinder 18 located at the bottom of the holder. The inner cylinder 9 has a bottom center communicating with the granule supply device 3 and an open top. The outer cylinder 2 has a combustion exhaust pipe 11 at the center of its upper part, and forms a combustion residue reservoir 17 between the partition cylinder 18 and the outer cylinder 2, and has a combustion exhaust outlet in the lower peripheral wall of the outer cylinder 2. 12 will be provided. Outer cylinder 2
A through hole 15 is formed at the bottom of the through hole 1.
5 is connected to the air supply pipe 13. Between the inner cylinder 9 and the partition cylinder 18 is a combustion chamber 5 which is inclined in the diametrical direction.
A partition plate 19 is provided with a through hole 20 having a directional component around the axis. Therefore, through hole 1
The airflow passing through 5 is swirled through the through hole 20;
It is sent into the combustion chamber 5. The granule supply device 3 is comprised of a screw conveyor, and automatically and continuously supplies granules such as rice husks in the hopper 4 to the combustion chamber 5 in the inner cylinder 9. A plurality of ventilation holes 10 are formed circumferentially at the bottom of the inner cylinder 9, and a cover 7 is provided above the ventilation holes 10 to prevent clogging of the ventilation holes 10. It is being Inside the inner cylinder 9, a heat insulating granule 6 made of ash, granular asbestos, etc. is arranged in a mortar shape. Further, a large number of grids 8 attached to the side wall of the inner cylinder 9 are arranged at an upper position of the inner cylinder 9 in an open state. Air supply pipe 13
is also connected to a through hole 16 formed at the bottom of the outer cylinder 2 located below the inner cylinder 9.

Next, the action will be explained in detail.

With an appropriate amount of granules such as rice husks being fed into the combustion chamber 5 from the hopper 4 by the granule supply device 3,
The granules are ignited by suitable means (not shown). The granules are subsequently delivered to the combustion chamber 5 by the granule supply device 3.
is supplied to Air flows from the air supply pipe 13 to the through hole 15,
16 Next, it passes through the ventilation hole 10, and the insulating particles 6 such as ash
and is sent into the combustion chamber 5. Thereby, the granules are automatically and continuously sequentially burned from the upper surface of the granules. Since the through hole 20 has a directional component around the axis with respect to the combustion chamber 5, the air sent into the outer cylinder 2 from the through hole 15 passes through the through hole 20 and generates an upward swirling flow. . Therefore, the combustion residue such as soot and ash is subjected to centrifugal separation by the swirling flow and is pressed against the wall surface of the outer cylinder 2 by the cyclone effect, and then due to the weight of the combustion residue itself, The cinders fall along the wall surface of the cinders reservoir 17 and are then discharged from the cinders discharge port 12. At this time, the air sent through the through hole 16 acts as primary air, and the air sent through the through hole 15 acts as secondary air to burn the particles. The high-temperature combustion exhaust gas from which combustion residue has been removed by the centrifugal action of the swirling flow is sent from the combustion exhaust stack 11 to a predetermined greenhouse, grain drying device, etc. (not shown) for use.

As described above, according to the present invention, the inner cylinder 9
Since the heat insulating body 6 is arranged in a mortar shape and the heat insulating body 6 is always maintained in that state, the temperature rise at the bottom and peripheral wall of the inner cylinder 9 can be significantly reduced, and the durability is improved. can be increased.

Furthermore, a partition cylinder is provided between the inner cylinder and the outer cylinder, and a combustion residue is provided between the partition cylinder and the outer cylinder, so that the granules supplied from the bottom of the inner cylinder remain incompletely burned. This prevents granules that have not been completely burned from falling into the combustible sump and being discharged.

Note that when the cover 7 is provided on the ventilation hole 10 provided at the bottom of the inner cylinder 9, the primary air bypasses the cover 7, passes through the heat insulator 6, and is sent into the combustion chamber 5, and the ventilation hole 10 A predetermined amount of primary air can be stably fed without clogging the granules, and combustion of the granules can be stabilized. Furthermore, secondary air from the through holes 15 can promote combustion of the granules.

Furthermore, when the grid 8 is placed above the inner cylinder 9, the burned embers are pushed by the particles supplied from below and pressed against the grid 8, and are decomposed into pieces that are smaller than the gaps between the grids 8 and pass through the through holes 15. It is further combusted by the secondary air, which makes it easier to discharge and improves thermal efficiency. Further, the temperature rise in the outer cylinder can also be prevented by the inflow of secondary air.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a granular combustion apparatus according to the present invention, and FIG. 2 is a sectional view taken along line AA in FIG. DESCRIPTION OF SYMBOLS 1... Granule combustion device, 2... Outer cylinder, 3... Granule supply device, 4... Hopper, 5... Combustion chamber, 6...
...insulating granules, 7...cover, 8...grid, 9...
Inner cylinder, 10... Ventilation hole, 11... Combustion exhaust pipe, 1
3...Air supply pipe, 15, 16...Through hole, 17...Cinders reservoir, 18...Partition cylinder, 19...Partition plate, 20...Through hole.

Claims (1)

[Scope of Claims] 1. A combustion chamber is formed by an outer cylinder and an inner cylinder disposed inside the outer cylinder at a distance from the outer cylinder, and a partition cylinder is provided between the inner cylinder and the outer cylinder. The inner cylinder has a bottom connected to the granule supply device, an open upper part, a ventilation hole in the bottom, and a mortar-like shape that slopes downward toward the center. A heat insulating body is disposed, the outer cylinder has a combustion exhaust pipe in its upper part, and a partition plate is provided between the inner cylinder and the partition cylinder and has a through hole having a directional component around the axis of the combustion chamber. , a granular material characterized in that a combust reservoir is provided between the partition cylinder and the outer cylinder, a combust discharge port is formed in the peripheral wall of the outer cylinder, and the ventilation hole and the ventilation hole are connected to an air supply pipe. Combustion furnace. 2. The granular combustion furnace according to claim 1, wherein the ventilation hole at the bottom of the inner cylinder has a cover. 3. The granular combustion furnace according to claim 1 or 2, wherein the inner cylinder has a grid above it.