JPS6260604B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a granular material combustion device that burns granular materials such as rice husks using swirling flow, and in particular, it continuously burns granular materials such as rice husks and burns granular materials such as rice husks in a combustion chamber. The present invention relates to a granular material combustion device that can automatically remove combustion residue by centrifuging it 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.

The present invention will be explained with reference to embodiment figures. Reference numeral 1 in the figure indicates a peripheral wall that constitutes a combustion chamber 2 inside, and the peripheral wall 1
A combustion exhaust port 3 is provided at the center of the upper part of the combustion chamber 2, and a rainbow board 4 is installed inside the combustion chamber 2. An annular swirling airflow chamber 5 is provided at the bottom of the combustion chamber 2, and the combustion chamber 2 is integrally mounted on a base 6. , the upper part of the air flow chamber 5 is formed into a ventilation wall surface 7 having a large number of through holes having a directional component around the axis of the combustion chamber 2, and the wall surface 7 is formed in the peripheral wall 1 of the combustion chamber 2. A mortar-shaped ventilated furnace body 10 connected to the outlet 8 and having an open upper part is installed in the inner ring cylinder part 9 of the swirling air flow chamber 5, and the bottom part of the furnace body 10 is connected to a granular body consisting of a screw conveyor. It communicates with the supply device 11, and 12 is a supply hopper provided at the other end. In addition, an unburnt gas combustion tube 13 with a porous wall is installed in the center of the interior of the ventilated furnace body 10.
4, and the cylinder wall of the combustion tube 13 and the wall of the ventilation furnace body 10 are connected to a plurality of ventilation pipes 1.
5..., and the air retention chamber 16 provided around the ventilated furnace body 10 and the airflow chamber 5 are connected to a blower device 19 via a feed pipe 18 equipped with a switching valve 17. . Further, the combustion exhaust port 3 of the combustion chamber 2
A combustion exhaust pipe 21 is installed on its outer periphery via a wind tunnel section 20.
The exhaust pipe 21 is connected to an exhaust passage 23 equipped with an exhaust fan 22, and the exhaust passage 23 has a cyclone collector connected to the combustion residue outlet 8 provided on the peripheral wall 1 of the combustion chamber 2. 24 exhaust pipes 25 are connected.

26 is a dust collection box of the cyclone collector, 27 is an electric motor that drives the granule supply device, 28 is an air supply port of the combustion exhaust stack, and 29 is a diffusion blade attached to the shaft end of the screw conveyor of the granule supply device 11. , 30 are exhaust control valves provided on the upper wall of the combustion exhaust stack 21.

With the above-described configuration, when an appropriate amount of granules such as rice husks are fed into the combustion passage 14 in the ventilated furnace body 10 from the supply hopper 12 by the granule supply device 11, the granules are fed by an appropriate means. (not shown) is ignited. The granules are subsequently supplied to the combustion channel 14 by means of a granule supply device 11 . Also, at the start of combustion,
Since the swirling airflow chamber 5 side is closed by the switching valve 17, the air (primary air) blown from the blower 19 is supplied to the combustion passage 14 via the air retention chamber 16 and removes particles in the passage. It burns like a red flame, and excess air (unburnt gas) is sent to the unburned gas combustion tube 1.
3, and the unburned gas in the cylinder is mixed with primary air from the vent pipe 15 and combusted. As soon as the upper part of the red flame-like particles filling the combustion passage 14 begins to flow like an avalanche onto the ventilation wall surface 7 of the surrounding swirling airflow chamber 5, the switching valve 17 is operated to move the swirling airflow chamber 5 side. Open. The air (secondary air) blown into the swirling airflow chamber 5 is passed through the ventilation wall surface 7 provided above.
The particles ejected from the numerous holes in the direction around the axis of the combustion chamber 2 and flowed onto the wall surface 7 are re-burned, and the embers such as soot and ash generated by the combustion are ejected from the holes. The ascending swirling flow causes the cinders to be centrifuged and pressed against the wall surface of the peripheral wall 1 by the cyclone effect, and then flow while falling due to their own weight and are discharged from the cinders discharge port 8 into the cyclone collector 24. The dust flows into the air and is removed. Further, the unburned gas combustion tube 13
While rising to the combustion chamber 2 above the cylinder 13, the unburned gas that has flowed out merges with the swirling flow (secondary air) and is re-burned to generate high-temperature exhaust gas. Therefore, the high-temperature combustion exhaust gas in the combustion chamber, from which the embers have been removed by the centrifugal action of the swirling flow, is sent to a predetermined greenhouse, grain drying device, etc. (not shown) via the combustion exhaust stack 21 for use.

As described above, according to the present invention, the air retention chamber 16 is provided on the outer periphery of the side of the mortar-shaped ventilated furnace body 10.
At the same time, the unburnt gas combustion tube 13 is suspended inside the furnace body 10 via the granular combustion passage 14, so that the primary air from the air retention chamber 16 is used to direct excess air to the unburnt gas combustion tube. It is possible to supply only the necessary amount to the granules in the combustion chamber 13 and to perform stable combustion without temperature irregularities at all times.
Since the mortar-shaped ventilated furnace body 10 is installed in the inner ring cylinder part 9 of the annular swirling airflow chamber 5, which has a ventilation wall surface 7 with a large number of holes with a directional component around the axis of The waste can be automatically removed by the centrifugal separation effect of the swirling flow, and the rising swirling flow (secondary air) joins with the unburned gas in the center of the combustion chamber and re-burns, generating high-temperature exhaust gas. Thermal efficiency can be improved, and since the combustion exhaust pipe 21 is provided at the combustion exhaust port 3 of the combustion chamber 2, it is possible to easily and continuously adjust the temperature, air volume, etc. as desired. There are effects such as being able to appropriately prevent temperature rise.

[Brief explanation of the drawing]

The drawings are illustrations of embodiments of the present invention. FIG. 1 is a side sectional view of the present device, and FIG. 2 is a partially cutaway plan view of the main part thereof. 1... Peripheral wall, 2... Combustion chamber, 3... Combustion exhaust port, 4...
Yama board, 5... swirling airflow chamber, 6... base, 7... ventilation wall surface, 8... ember discharge port, 9... inner ring cylinder part, 10
... Breathable furnace body, 11 ... Granular material supply device, 12 ... Supply hopper, 13 ... Unburnt gas combustion cylinder, 14 ... Combustion passage, 15 ... Ventilation pipe, 16 ... Air retention chamber, 17 ... Switching valve, 18 ... Sending Pipe, 19...Blower device, 20...Wind tunnel section, 21...Combustion exhaust stack, 22...Exhaust fan, 23...Exhaust channel, 24...Cyclone collector, 25...Exhaust stack, 26...Dust collection box, 27...Electric motor, 28 ...Air supply port, 29...Diffusion vane, 30...Exhaust control valve.

Claims (1)

[Scope of Claims] 1. A combustion exhaust port in which an annular swirling airflow chamber is installed in the lower part of a combustion chamber with a combustion exhaust port provided in the upper part, and a ventilation wall surface in the upper part of the swirling airflow chamber is provided in the peripheral wall of the combustion chamber. At the same time, a mortar-shaped ventilated furnace body is installed in the inner ring cylinder part of the swirling airflow chamber, and an unburned gas combustion cylinder is suspended inside the furnace body through a granular combustion passage. The cylindrical wall of the combustion tube and the wall of the air permeable furnace body are connected by a plurality of ventilation pipes, and a granule supply device is connected to the bottom of the furnace body, and an air retention chamber is provided around the furnace body. A granular material combustion device, wherein the air retention chamber and the swirling airflow chamber are connected to an air blower. 2. The granular material combustion device according to claim 1, wherein the combustion exhaust port of the combustion chamber has a combustion exhaust stack.