JPS60138307A - Burner of solid fuel - Google Patents

Abstract

PURPOSE:To enable sending out of dustless hot air, by providing a multi-step combustion chamber and a dust-collecting chamber in a specific structure. CONSTITUTION:Solid fuel supplied from a fuel tank 8 is distributed evenly in a radial direction by a roofing material 19 and come down within a combustion chamber 11. Air is fed within a first air chamber 16 from an air delivery pipe 17 and blown off within the combustion chamber 11 through a first vent hole 14 of a first partition body, through which combustion of the solid fuel is assisted. Then the air is blown off within a second air chamber 21 through a second vent hole 22 of a second partition body 20 in hot air. In addition to the above, the hot air flows out into a secondary combustion chamber 27 from a blow-off port 28. Air is fed into a first dust collecting chamber 30 with pressure through a secondary air blast pipe 31, blown off into the secondary combustion chamber 27 through a gap of a roaster 29 and unburnt dust in the hot air is burnt. Ash contents generated through combustion and remained through a matter that dust collection is unable to complete into the first dust collecting chamber 30 are collected into a second dust collecting chamber 37 through a dust collecting port 38. The hot air not including the ash contents is discharged through a hot air discharge pipe 36 like this.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a solid fuel combustion device that can burn solid fuel and send out dust-free hot air.

Conventionally, solid fuel combustion equipment has a large amount of dust in the hot air it produces, and since the dust is a combustible component, it is easy to cause bank fires. could not be used as is.

Based on the above-mentioned circumstances, the object of the present invention is to provide a solid fuel combustion device that can send out hot air free of oJ fuel component dust even when solid fuel is burned. .

Next, an embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the combustion apparatus according to this embodiment of the present invention has a generally dog-shaped fuel detection chamber 3 provided on the upper end surface of the combustion tower in the apparatus main body. A fuel membrane pipe is installed in a part thereof, and the upper opening of the fuel drop pipe q is connected to one end of the fuel transport pipe 7, which houses a screw conveyor B which is rotated by a drive device such as a motor S. The opening at the other end of the fuel transfer pipe 7 is connected to the opening at the bottom of the hopper in the fuel storage tank g. In the fuel detection chamber 3, a fuel detection means 10 is provided at a predetermined position.
For example, it is equipped with a light illumination device M (not shown) and a photoelectric conversion element (not shown) that detects the light beam emitted from the light irradiation device, and inputs a signal current outputted from the fuel detection means 10. The solid fuel, such as coal, in the fuel storage tank g is conveyed by the screw conveyor B by the drive of the motor.
The conveyed solid fuel is dropped into the fuel detection chamber 3 from the fuel drop pipe 1.

The bottom of the fuel detection chamber 3 is provided with an opening F'AI2 that opens toward the combustion chamber // in the combustion tower.

The fuel detection chamber 3, fuel drop pipe 11, fuel transfer pipe 7, and fuel storage tank S have a sealed structure except for the opening/2 shown in 11. A cylindrical first partition body/S that opens a number of first air chambers/6 is installed in the outer structure/3 formed as a cylindrical body with a bottom and a lid using a resin material. They are arranged concentrically, and the inner surface of the external structure/3 and the outer surface of the first partition body/S form a first air chamber/6.

On the circumferential side near the ceiling of the external structure /3, there is an air delivery pipe / for sending air blown from a blower device (not shown), such as an air conditioner, into the first air chamber n.
Attach 7.

In the first air chamber 1A, as shown in FIGS. 2 and 3, a plurality of partition plates/g are arranged on the same horizontal plane from the outer periphery of the first partition body/left toward the inner periphery of the external structure/3. A plurality of radial partition plates/g are arranged radially on the top and alternately along the vertical direction. By tilting each plate with respect to the horizontal plane, air is sent into the first air chamber/6 at an appropriate pressure from the air delivery pipe/7 installed near the ceiling. It is possible for the air to descend around the outer circumference of the first partition wall body /S as a swirling air current, trace the inside of the first air chamber /6, and blow out into the first partition wall body IS.

Inside the first partition body/S, there is a cylindrical second partition body θ having a conical roof groove 79 at the top and a lattice-like shape at the bottom and widening toward the end. They are arranged concentrically, and an annular combustion chamber is formed by the inner surface of the first partition wall and the outer surface of the second partition wall.

The second partition body -◯ is arranged so that the center line of the second partition body 20 and the center line of the opening /2 are aligned. Therefore, the solid fuel falling from inside the fuel detection chamber 3 is
The fuel is distributed uniformly in the radial direction and is uniformly accumulated in the combustion chamber.

A large number of second ventilation holes 2- are provided on the circumferential side of the second partition body 20, so that the hot air formed inside the combustion chamber is passed through the second ventilation holes 2-.
The air flows through the second partition wall body and into the air chamber 2/2 in 2θ.

The reason why the lower part of the second partition wall body 20 is formed to widen toward the end is that the solid fuel whose particle size becomes smaller by being burned in the combustion chamber This is to improve the air passage by hiding the distance the air passes through even if it accumulates densely between the lower part on the left.

At the bottom of the first partition wall/S, there is an extra ¥51! A fuel injection pipe passing through the structure /3, 23 is inserted into the fuel injection pipe 2.
The fuel inlet of No. 3 can be sealed with an airtight lid. By sealing the spark inlet with two airtight lids, it is possible to prevent the hot air generated within the combustion chamber from flowing out from the spark inlet.

A dust removal combustion section 2 is provided below the combustion tower.

The dust removal combustion section 2S has a secondary combustion chamber in which a cylindrical body λB having a horizontal center line is arranged directly below the combustion tower. A blowout of 0.2g is provided which communicates with chamber 2/ and is capable of blowing air in the tangential direction of the outer circumference of the cylindrical body i, so that the hot air blown out from the blowing donkey swirls around the outer circumference of the cylindrical body m. There is. A loss torque converter having a drainboard-like gap is arranged at the bottom of the secondary combustion chamber 27, and the space below the loss point 29 is the primary combustion chamber.
A dust collection chamber 30 is formed. A secondary air blow pipe 3/ is drawn into the first dust collection chamber 3o.
Fresh air is supplied into the first dust collection chamber 3o from fl-1.
Next, the secondary combustion chamber-2 is opened from the gap in the Rosdol 29.
It bursts out within 7. - Also, on the outer circumferential surface of the cylindrical body 2B, there is a part slightly in front of the area where the hot air sent out from the blowing donkey swirls around the outer periphery of the cylindrical body 2B and encounters the hot air sent out from the blowing 0.2g again. A hot air inlet 3.2 is opened at this location, and the hot air swirling around the outer periphery of the cylindrical body 24 is introduced into the cylindrical body 2A from the hot air inlet 3.2.

The cylindrical body 2 extends horizontally to the outside near the secondary combustion chamber. Cylindrical body in secondary combustion chamber 27, 2
A small cylindrical body 33 having an outer circumferential surface facing the heat exchanger inlet 3.2 is disposed inside B, and a tertiary air blowing pipe 3 for sending out tertiary air is disposed on the tip surface of the small cylindrical body 33. The opening of the tertiary air blow pipe 3.2 is open, and the hot air blown from the hot air introduction port 3.2 swirls around the outer circumference of the small cylindrical body 33 to form a swirling flow, and the hot air flows from the opening of the tertiary air blast pipe 3'l. The fresh tertiary air flow sent out causes the swirling flow to proceed in a spiral manner within the cylindrical body, and the flammable dust in the spiral air flow and the forced hot air is completely combusted by the tertiary air. There is.

Therefore, the inside of the cylindrical body 26 forms the tertiary combustion chamber 3S.

-9111 of the cylindrical body M has a hot air discharge pipe 36 disposed opposite to one end surface of the small cylindrical body 33, and the cylindrical body is located below the hot air discharge pipe 3B within the cylindrical body M. A dust collection port 3g connected to the second dust collection chamber 37 is provided on the circumferential side of the chamber.
The cylindrical body collects ash produced by combustion in the second dust collecting chamber 37 through the dust collecting port 3g, and supplies hot air without ash to the hot air discharge pipe 3. It's gone.

The outlet of the hot air discharge pipe 3B can be connected to a delivery pipe (not shown) that supplies hot air to greenhouses and other facilities equipped with heating equipment.

Next, the operation of the above configuration will be described.

Assuming that the combustion chamber // is not yet filled with solid fuel, first drive the motor S to rotate the screw conveyor 6 to transport the solid fuel in the fuel storage tank and transfer the solid fuel to the fuel drop pipe. from there into the fuel detection chamber 3.

The dropped solid fuel falls further, is evenly distributed in the radial direction by the roofing material /9, and falls inside the combustion chamber 11. In the combustion chamber //, the solid fuel fills the combustion chamber // with appropriate voids. Then, when the solid fuel is filled with a trench at a predetermined height in the fuel detection chamber 3, the fuel is introduced into the combustion chamber from the fuel injection pipe 23 to ignite the solid fuel.

When the solid fuel is ignited, the fire scale input port of the fuel input pipe 23 is sealed with a sealing lid, and then the first
Air chamber/Push fresh air into the interior. In the first air chamber/B, there are multiple partition plates/g, so 1. As a result, an air flow that spirals around the outer periphery of the first partition body/S is formed. The swirling air flow follows the first partition body/left first vent hole/g and blows out into the combustion chamber//.
Helps burn solid fuel.

In the combustion chamber //, the solid fuel whose particle size becomes smaller as it burns falls to the bottom of the combustion chamber //.

As a result, in the combustion chamber //, solid fuel with a small particle size is burned in the lower part of the vertical direction, and solid fuel with a larger particle size is burned as it reaches the upper part.

Note that as combustion progresses and the overall volume of the solid fuel decreases, the fuel detection means 10 detects a decrease in the amount of solid fuel and drives the motor S to newly supply the same type of fuel to the combustion chamber //. Therefore, a certain amount of solid fuel is always being burned in the combustion chamber //.

The cooled air supplied to the combustion chamber// is heated to a high temperature at the same time as helping the combustion of the solid fuel. It erupts.

Then, the hot air in the second air chamber 21 flows out from the blowing donkey into the secondary combustion chamber 27 in the tangential direction of the cylindrical body. The heat JfA from the blown 0.2 g swirls along the circumferential side of the cylindrical body, and during the swirl, it follows the gap between the ash in the hot air and the loss drum and enters the first dust collection chamber 30. .

On the other hand, fresh air is forced into the first dust collection chamber 30 from the secondary air blowing pipe 3/, and this fresh air is blown into the secondary combustion chamber 27 through the gap in the loss drum 29. In addition to increasing the swirling speed of the hot air swirling around the cylindrical body,
n] Combustible unburned dust in hot air. It is difficult to separate the ash produced by combustion of unburned dust and collect it in the first dust collection chamber 30.

The hot air swirling around the circumferential side of the cylindrical body M flows into the cylindrical body M through the hot air inlet 3, and is passed through the small cylindrical body 33 within the cylindrical body 26.
A hot air current swirling around the circumferential side of the air is formed.

Inside the small cylindrical body 33, that is, in the tertiary combustion chamber 3S, the tertiary air blow pipe, ? Since fresh air is ejected from 111 along the centerline direction of the cylindrical body 33, the swirling flow 111 turns into a spiral airflow and advances toward the hot air discharge pipe 3B, and also flows into the secondary combustion chamber near. The combustible unburned dust that was not completely combusted will be completely combusted by the air from the tertiary air blower pipe 3.

The ash generated by the complete combustion and the ash remaining without being completely collected in the first dust collection chamber 30 pass through the dust collection port 3g and collect in the second dust collection chamber 37.

In this way, the hot air that contains no ash and becomes a spiral airflow is discharged from the hot air discharge pipe 3B, and is supplied to a greenhouse, etc., for example, through a blower pipe connected to the hot air discharge pipe 3B. , used for heating greenhouses.

Although one embodiment of the present invention has been described in detail above, this invention is not limited to the above-mentioned embodiment, and can be implemented with appropriate modifications within the scope of the gist of the invention. It's okay to be in a trench.

As detailed above, according to the present invention, hot air containing dust can be exhausted despite the combustion of solid fuel, and the combustion device according to the present invention can supply clean hot air. Various facilities can be heated effectively. In addition, since a fuel detection means is provided, fuel cut-off in the combustion chamber 1. It never happens.

[Brief explanation of the drawing]

8P, FIG. 1 is a schematic vertical cross-sectional view showing a solid fuel combustion device according to an embodiment of the present invention, FIGS. 2 and 5 are schematic cross-sectional views showing a combustion tower in the combustion device, and FIG. The figure is a schematic vertical sectional view showing a dust removal combustion section in the combustion device. W... Fuel storage tank, //... Combustion section (1, 27...
...Secondary combustion chamber, 3 left...Third combustion chamber. Patent applicant Sun Energy Co., Ltd.

Claims (1)

[Claims] Air is supplied into the combustion chamber containing the solid fuel supplied from the fuel storage tank to combust the solid fuel, and the resulting hot air is sent into the secondary combustion chamber to supply fresh air into the secondary combustion chamber. The air and the hot air are mixed to burn unburned dust in the hot air, and the heat in the secondary combustion chamber is further sent to another secondary combustion chamber to provide fresh air to the other secondary combustion chamber. 1. A combustion device of the same type, characterized in that it is capable of exhausting dust-free hot air after burning residual unburned dust and removing residual ash.