KR101272380B1 - Burner for pellet - Google Patents

Abstract

PURPOSE: A device for combusting pellet fuel is provided to increase the efficiency of combustion by rapidly discharging the residue because a spiral groove is formed in the transferred inner surface panel while the pellet fuel is combusted. CONSTITUTION: A device(100) for combusting pellet fuel comprises a supply path(120) where the pellet fuel is supplied to one end of a fuel supply unit. The other end of a fuel discharge unit includes a combustion case(150). A spiral groove is formed in an inner surface panel of the combustion case and transfers the pellet fuel to the fuel discharge unit according to the rotation of the combustion case. An air volume control damper(200) is installed on a lower part of the fuel supply unit and controls the volume of air supplied to the upper and lower parts of the combustion case.

Description

Pellet Fuel Combustor {Burner for pellet}

The present invention relates to a pellet fuel combustion apparatus, and more particularly, to form a spiral groove in the inner wall of the cylindrical combustion cylinder in consideration of the flow of fuel, and to control the amount of air supplied to the lower part of the combustion chamber and the upper and left and right sides of the combustion chamber, The present invention relates to a pellet fuel combustion device capable of supplying air to fuel in three dimensions and increasing combustion efficiency by sequentially and rapidly discharging residues.

In general, the conventional biofuel combustion apparatus (Korean Patent Laid-Open Publication No. 2010-32140) is a mixture of chaff, sawdust, tissue paper, shell, straw, fiber waste, and waste plastic, and compressed and pelletized. Insert into a rotating steel pipe and ignite. A variety of waste pellets are used as petroleum substitute fuels by blowing the combustion air in the direction to rotate the combustion air from the hot air inlet provided on the outer circumference of the steel pipe and injecting it into the boiler. In addition, fossil fuel consumption can be reduced by 80%. Plant debris and waste products do not burn even when compressed and solidified, but when mixed and assembled with 10-30% of plastic waste products, they become stable and burn high-calorie fuel.

Pelletized fuels burn quickly because the smaller the particle size, the larger the oxidation area, but they are difficult to burn because they fall on the lattice. Conventional biofuel combustion apparatus rotates the pellets by inserting them into a pellet burner composed of a tube and an exterior supporting the same, while rotating a small diameter pellet of about 48 mm, and rotating the inner tube. While warming the air in the outer cylinder to about 200 ~ 300 ℃ by the heat transmitted to the outer surface of the rotary cylinder while moving in the direction of the crater of the burner with the transmission blade installed inside, the pellet in the inner cylinder from the spout installed in the inner cylinder ) To burn pellets at high temperatures quickly. The pellet which burns at a high temperature continues combustion while rotating as the inner cylinder rotates, moves toward the burner outlet, becomes ash, and falls from the burner outlet to ash. According to the results of the combustion test, 50 kg of pellets of 80% of 6 mm diameter chaff and 20% of waste plastic were burned in one hour, generating about 500,000 kilocalories of heat. Compressing and assembling waste plastic in flame retardant waste such as rice hulls, pellets of about 6000 kilocalories / kg are produced.

However, the pellet fuel combustion apparatus according to the prior art does not provide a structure in which the ash is properly discharged to the outside because the combustion cylinder in which the combustion is made lies sideways, and thus the ash is solid and there is a problem in that the combustion efficiency cannot be increased.

In addition, the pellet fuel combustion apparatus according to the prior art has a structure in which a combustion cylinder is laid on the side and pellet fuel is supplied, so that the pellet fuel is accumulated at the bottom so that the flow rate of the supplied air cannot be maximized and the lower fuel will not flow. There is a problem that can not supply because there is a limit to increase the combustion efficiency.

The present invention is to solve the problems as described above, the purpose is to design the inside of the combustion cylinder so that the pellets are naturally discharged out as the combustion inside the combustion cylinder and to control the flow path so that the maximum air flow into the interior of the combustion cylinder The present invention seeks to provide a pellet fuel combustion apparatus that can achieve maximum thermal efficiency.

As a specific means for achieving the above object, the present invention is a pellet fuel combustion device that the pellet fuel is burned while being rotated sideways, a supply passage for supplying pellet fuel to one end of the fuel supply unit is formed and the lower part of the supply passage The other end, which is installed in the ignition device and the fuel discharge part, includes a combustion cylinder that is open to emit flames, and a spiral groove is formed in the inner panel so that the pellet is transferred toward the other end as the combustion cylinder rotates.

Preferably, an air guide is formed outside the inner panel so that a part of the outside air supplied from the fuel supply part is moved to the fuel discharge part and then returned to the fuel supply part, and then inside the combustion cylinder through a nozzle formed in the inner panel. Is supplied.

Preferably, the nozzle of the inner panel is formed at an angle with respect to the radial direction.

Preferably, the lower portion of the fuel supply unit is provided with an air volume control damper, it is possible to adjust the amount of air supplied to the upper and lower combustion cylinders differently.

Preferably, the combustion cylinder is tapered to reduce the diameter so as to go from the fuel supply portion to the fuel discharge portion.

The present invention as described above has the following effects.

(1) Since the pellet fuel combustion apparatus according to the present invention has a spiral groove formed in the inner panel which is transported while the pellet fuel is combusted, the discharged residues are rapidly discharged, thereby providing an effect of increasing combustion efficiency.

(2) The pellet fuel combustion apparatus according to the present invention can be controlled by varying the amount of air supplied to the lower part, the upper part, and the left and right side parts by the air control damper, thereby increasing the thermal efficiency by supplying the air to the maximum. to provide.

(3) The pellet fuel combustion apparatus according to the present invention forms an air flow path that is introduced into the combustion cylinder through the nozzle of the inner panel while the introduced air is advanced once by the guide and then turns, so that the flow of air does not generate turbulence. The wind pressure and air volume of the front and the end of the combustion chamber are evenly supplied to provide the effect of increasing the thermal efficiency by continuously burning.

1 is a longitudinal sectional view of a pellet fuel combustion device according to the present invention.
2 is a cross-sectional view of the pellet fuel combustion apparatus according to the present invention.
Figure 3 is a longitudinal cross-sectional view of the pellet fuel combustion apparatus according to the present invention, showing the flow of air and fuel during operation.
Figure 4 is a front view of the outer wall blocking the fuel supply portion which is a part of the pellet fuel combustion apparatus according to the present invention.
5 is a longitudinal sectional view according to another embodiment of the pellet fuel combustion apparatus according to the present invention.

The objects, features and advantages of the present invention described above will become more apparent from the following detailed description. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Pellet fuel combustion device 100 according to a preferred embodiment of the present invention as shown in Figs. 1 to 4 as a pellet fuel combustion device is burned pellet fuel while being rotated sideways, the pellet fuel is one end A supply passage 120 to be supplied is formed, and an ignition device 140 is installed below the supply passage 120, and the other end of the fuel discharge portion includes a combustion cylinder 150 opened so that flames can be emitted. As the communication 150 rotates, a spiral groove is formed in the inner panel 154 so that the pellet is transferred to the other end. Here, a guide 153 is formed outside the inner panel 154 so that a part of the outside air supplied from the fuel supply part is moved to the fuel discharge part and then returned to the fuel supply part and formed on the inner panel 154. It is supplied into the combustion cylinder 150 through the nozzles 154a, 154b, and 154c. In addition, the nozzles 154a, 154b, and 154c of the inner panel 154 are formed to be inclined at an angle θ with respect to the radial direction. In addition, an air volume control damper 200 is installed below the fuel supply unit, so that the amount of air supplied to the upper and lower parts of the combustion cylinder 150 can be adjusted differently. In addition, the combustion cylinder 150 is tapered to reduce the diameter so as to go from the fuel supply portion to the fuel discharge portion.

Reference to each drawing will be described in detail.

First, referring to FIG. 1, the pellet fuel combustion apparatus 100 according to the present invention has a shape in which a combustion cylinder 150 is laid on its side, and the combustion cylinder 150 is configured to rotate. The fuel supply portion of the combustion cylinder 150 is blocked by the outer wall 130, and the fuel discharge portion on the opposite side is opened. The pellet fuel combustion apparatus 100 according to the present invention has an inner panel 154 having a spiral groove 154d formed in the combustion cylinder 150. Pellet fuel is supplied directly to the inner panel 154, where combustion proceeds. The inner panel 154 has nozzles 154a, 154b, and 154c formed between the valleys and the mountains, respectively. The nozzles 154a and 154c formed in the valleys and mountains among the nozzles 154a, 154b and 154c are formed to be inclined at a predetermined angle θ with respect to the radiation direction as shown in FIG. 2. This is ideally done to improve the tangential direction to the flame. The guide 153 is provided on the outer surface of the inner panel 154. The guide 153 is a part of the air introduced from the air inlet 111 of the fuel supply portion is directly into the combustion cylinder 150 through the nozzle 131 of the outer wall 130, part flows in the radial direction It flows through the air flow path made by the guide 153 and the outer panel 152 toward the fuel discharge portion. The air is then U-turned and passed between the inner panel 154 and the guide 153 and is supplied into the combustion cylinder 1500 through the nozzles 154a, 154b and 154c of the inner panel 154. The outer panel ( 152 constitutes a single cylinder, and an outer wall panel 110 is formed on the fuel supply side, and a bearing 112 is installed between the outer wall panel 110 and the outer panel 152. Thus, the outer panel 152 ) Rotates but the outer wall panel 110 is not rotated like the outer wall 130. The outer wall panel 110 is formed with an air inlet 111 through which air flows. A passage to be supplied is formed, and a screw 121 driven by the motor 122 is installed in the passage so that the pellet fuel introduced from the pellet fuel inlet 120a formed thereon is supplied into the combustion cylinder 150. The outside of the outer panel 152 is horizontal. A horizontal cover 151 is provided for holding, and a heat insulating material 160 is provided on an outer surface of the horizontal cover 1510. The horizontal cover 151 is formed by rollers 170 driven by the motor 180. The combustion cylinder 150 is rotated by the rotation.

With this structure, the inner panel 154, the guide 153, the outer panel 152, and the horizontal cover 151 are rotated by the driving force of the motor 180, and the outer wall 130, the outer wall panel 110, The air volume control damper 200 is not rotated. Accordingly, only the supplied pellet fuel is rotated to burn and simultaneously discharged along the spiral groove 154d of the inner panel 154.

An ignition device 140 is installed at the lower side of the outer wall 130 to penetrate the outer wall 130 to burn pellet fuel accumulated at the lower side of the inner panel 154. In addition, the air volume control damper 200 for adjusting the air flowing in the lower portion from the center of the combustion cylinder 150 is installed. By adjusting the air volume control damper 200 it is possible to adjust the amount of air introduced into the upper and lower portions of the combustion cylinder 150, respectively. For example, if there is no control damper (2000), the maximum amount of air supplied will be the limit until the pellet fuel is not blown. However, if the amount of air entering the lower portion of the control damper 200 is adjusted, the air volume is controlled to the limit. If you do this, the amount of air entering the upper portion will be increased.

Referring to FIG. 2, it is indicated that pellet fuel is supplied inside the inner panel 154. As shown, since the pellet fuel is in the state in which the combustion cylinder 150 is being rotated, it forms a form stacked slightly to the left in the drawing. As the combustion cylinder 150 is rotated as described above, combustion occurs, and the nozzles 154a, 154b, and 154c formed in the hills and valleys of the inner panel 154 are formed to be inclined at an angle with respect to the radial direction to form a more powerful flame. The direction is ideally such that the nozzles 154a and 154c are formed along the tangential direction on the generated screen. Air flowing into the air inlet 111 flows between the guide 153 and the outer panel 152 in the drawing to the fuel outlet, and then makes a U-turn to enter between the guide 153 and the inner panel 154 and finally The nozzles 154a, 154b, and 154c of the inner panel 154 are sprayed.

Referring to FIG. 3, the flow of fuel and the flow of air are well illustrated. The pellet fuel is introduced into the fuel inlet 120a and then supplied into the combustion cylinder 150 by the rotation of the screw 121, and ignition is performed by the ignition device 140. Of course, the combustion cylinder 150 is in a state of being rotated by the driving force of the motor 180. The air supplied to the inner panel 154 is first supplied to the air inlet 111, and partly passes through the nozzle 131 of the outer wall 130 to be supplied into the combustion cylinder 150, and a part thereof is in a radial direction. Nozzles 154a, 154b, and 154c formed in the inner panel 154 while flowing outwardly and moved between the guide 153 and the outer panel 152, and then turned again, and then flows between the guide 153 and the inner panel 154. It is injected through the inside). Of course, the pellet fuel that is burned is transferred toward the fuel discharge section according to the guide of the groove 154d which is rotated because the inner panel 154 has the spiral groove 154d and is eventually discharged.

If the air is supplied directly to the panel nozzles 154a, 154b, and 154c without following the flow path of the U-turn structure, vortices are generated in various places and the flame does not have a constant shape. As a result, the conventional technique in which the thermal efficiency is lowered can not be solved. By having a U-turn structure, it removes turbulence from the flow of air supplied to the inner panel nozzles 154a, 154b, and 154c, and keeps it in laminar flow so that air is continuously supplied continuously to create a constant flame, and thus thermal efficiency is reduced. It will increase.

Referring to Figure 4, the shape of the outer wall is shown well. The outer wall 130 has a large number of radially formed air nozzles 131 directly into the combustion cylinder, and in particular the ignition device 140 and the air volume control damper 200 is installed in the lower portion to control the amount of air Can be.

On the other hand, referring to Figure 5, another embodiment according to the present invention is shown. The difference from the previous embodiment is that in the previous embodiment, the bent portion of the spiral groove 154d of the inner panel 154 is rounded, but in this embodiment, the bent portion of the spiral groove 154d is angularly formed. . Of course the nozzle is like being formed.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

100: pellet fuel combustion device
110: outer wall panel 111: air inlet
112: bearing 120: pellet fuel supply passage
121: screw 130: outer wall
140: ignition device 150: combustion cylinder
151 horizontal cover 152 outer panel
153: Guide 154: Inner Panel
200: air volume control damper

Claims (5)

Pellet fuel combustion device which is divided and rotated while burning the pellet fuel,
At one end of the fuel supply unit, a supply passage for supplying pellet fuel is formed, and an ignition device is installed below the supply passage.
A spiral groove is formed in the inner panel of the combustion cylinder, so that pellet fuel is transferred toward the fuel discharge portion as the combustion cylinder rotates.
An air volume control damper is installed below the fuel supply unit, so that the amount of air supplied to the upper and lower parts of the combustion cylinder can be adjusted differently. The method of claim 1,
A guide is formed outside the inner panel so that a portion of the outside air supplied from the fuel supply part is transferred to the fuel discharge part and then returned to the fuel supply part and is supplied into the combustion cylinder through a nozzle formed in the inner panel. Pellet fuel combustion apparatus. The method of claim 2,
The nozzle of the inner panel is pellet fuel combustion apparatus, characterized in that formed inclined at an angle with respect to the radial direction. delete The method of claim 1,
The combustion cylinder is a pellet fuel combustion device, characterized in that tapered so that the diameter decreases toward the fuel discharge portion from the fuel supply portion.

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