KR101772907B1 - Solid fuel burner and solid fuel fan heater with the same - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot air fan, and more particularly, to a hot air fan that uses solid fuel such as pellets or wood chips as a fuel. The present invention relates to a heat exchanger comprising a heat insulating case formed with a hot air discharge port, a combustion chamber provided in the heat insulating case, a plurality of connections provided inside the heat insulating case and communicating with the combustion chamber, And a blower installed to supply air to the inside of the heat insulating case at one side of the heat insulating case, wherein the blower is provided with a blower for blowing air generated by the burning of the solid fuel to the inside of the combustion chamber, Wherein the air introduced into the heat insulating case is heated by heat exchange between the combustion chamber and the connection, and then discharged through the hot air discharge port. The burner includes a grate for supporting a solid fuel, And a fuel supply pipe connected to the grate through an open side facing the grate An air inlet pipe for supplying air below the grate through a plurality of through holes formed toward the grate, and a plurality of through holes formed in a surface facing the grate, And a second air reservoir for supplying air upward. The hot air according to the present invention has an advantage that it is easy to ignite even when a solid fuel containing a large amount of moisture is used.

Description

Technical Field [0001] The present invention relates to a solid fuel burner and a solid fuel burner having the same,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot air fan, and more particularly, to a hot air fan that uses solid fuel such as pellets or wood chips as a fuel.

BACKGROUND ART Heat fans using various fuels such as oil, gas, electricity, charcoal, firewood, coal, and pellets are used. Among them, the hot air blower using oil, gas, electricity and the like has an advantage that it is convenient to use, but there is a problem that the maintenance cost is expensive.

Solid fuels such as charcoal, firewood, coal, and pellets have the problem that they do not easily catch fire even though they have a lower ignition point than liquid or gaseous fuels, but they are always kept above the ignition point when ignited. The hot air blower using the advantages of the solid fuel includes a burner for burning a solid fuel, a combustion chamber, a pipe for heat exchange with heat generated in the burner, etc., as disclosed in Japanese Patent Application Nos. 10-0873034 and 10-0917787 A heat exchanging means, and a blower for supplying outside air. An exhaust gas treatment device, and a reprocessing device for treating the remaining material after burning the solid fuel. The burner is equipped with an electrothermal heater, a gas heater, or the like as means for burning solid fuel.

However, there has been a problem that it is difficult to maintain the complete combustion of the solid fuel in the combustion air supply device for the solid fuel of the conventional hot air fan.

Further, when a solid fuel containing a large amount of moisture, for example, a solid fuel such as a wood chip, is used, there is a problem that it is difficult to ignite when a burner using a conventional electric heater or gas heater is used.

Patent No. 10-0873034 Registration No. 10-0917787

SUMMARY OF THE INVENTION It is an object of the present invention to provide a hot air fan capable of maintaining the complete combustion of solid fuel. Another object of the present invention is to provide a hot air fan which is easy to ignite even when a solid fuel containing a large amount of moisture is used.

According to an aspect of the present invention, there is provided an air conditioner comprising: a heat insulating case formed with a hot air discharge port; a combustion chamber provided in the heat insulating case; a plurality of connections provided inside the heat insulating case, A burner for burning a solid fuel mixed with air and emitting a flame generated when the solid fuel is burned into the combustion chamber; and a blower installed to one side of the heat insulating case to supply air into the heat insulating case Wherein the air introduced into the heat insulating case by the blower is heated by heat exchange between the combustion chamber and the heat exchanger, and then discharged through the hot air discharge port. The burner includes a grate for supporting the solid fuel, A fuel supply pipe for supplying a solid fuel on the grate, an open face toward the grate An air inlet pipe for supplying air down the grate through a plurality of through holes formed toward the grate, a plurality of through holes formed on the surface facing the grate, And a second air reservoir for supplying air over the grate through a hole.

The burner may further include an ignition flame guide pipe whose one end is opened so as to face the solid fuel, a nozzle which is installed inside the ignition flame guide pipe and emits fuel for ignition in the solid fuel direction, An ignition plug disposed in the ignition flame guide tube downstream of the nozzle and having a bottom wall facing the nozzle and a bottom wall extending obliquely from the bottom wall in a direction away from the nozzle, Wherein the bottom wall is formed with a through hole through which the ignition fuel injected from the nozzle passes and a guide vane guiding the flow of air, and the side wall has a plurality of through- Lt; / RTI >

The present invention also provides a fuel cell system comprising: a grate for supporting a solid fuel; a fuel supply pipe for supplying a solid fuel on the grate; a first air reservoir for supplying air below the grate through an open surface facing the grate; An air inlet pipe for supplying high air beneath the grate through a plurality of through holes formed toward the grate, and a second air chamber for supplying air over the grate through a plurality of through holes formed in a surface facing the grate Provide a burner.

The hot air according to the present invention has an advantage that the amount of the air supplied for combustion of the solid fuel can be kept constant so that the solid fuel can be completely burned. In addition, there is an advantage that it is easy to ignite even when a solid fuel containing a large amount of moisture is used.

1 is a schematic view of a hot air blower according to an embodiment of the present invention.
2 is a schematic view of the burner shown in Fig.
3 is a perspective view of the diffusion plate shown in Fig.
Fig. 4 is a view for explaining the combustion air supply portion of the burner shown in Fig. 2;
5 and 6 are views showing the associated cleaning apparatus shown in FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It will be apparent to those skilled in the art that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know. Like reference numerals refer to like elements throughout.

1 is a schematic view of a hot air blower according to an embodiment of the present invention. As shown in FIG. 1, a hot air heater 100 according to an embodiment of the present invention includes a heat insulating case 20, a heat insulating case 20 provided on one side of the heat insulating case 20, A connection 50 that is provided inside the heat insulating case 20 and communicates with the combustion chamber 40 and a heat insulating case 20 which is provided inside the heat insulating case 20. The blower 30, A burner 60 for burning the solid fuel mixed with air and emitting a flame generated when the fuel is burned into the combustion chamber 40, and an associated cleaning device 80.

The heat insulating case 20 serves to provide an internal space in which the combustion chamber 40 and the association 50 are installed and to provide a space through which air introduced through the blower 30 flows and absorbs heat . A hot air discharge port 21 is formed in the heat insulating case 20 through which the heated air flows through the blower 30 and then is heat-exchanged with the combustion chamber 40 and the association 50. In this embodiment, the blower 30 is provided at the upper end of the heat insulating case 20 and the pair of hot air discharge openings 21 are formed at the lower front and rear surfaces of the heat insulating case 20, respectively. The outside air introduced from above through the blower 30 installed in the upper part of the heat insulating case 20 is heated by the heat exchange with the association 50 and the heat exchange with the combustion chamber 40, And is discharged through the hot air discharge port 21.

The combustion chamber (40) is disposed below the heat insulating case (20). The combustion chamber 40 is generally rectangular in shape. In the combustion chamber (40), solid fuel is burned. Solid biomass fuels such as pellets or wood chips can be used as solid fuel. A first combustion chamber 55 is connected to one side of the upper surface of the combustion chamber 40, in which a high-temperature gas due to the combustion of the solid fuel collects. As shown in the figure, the first combustion chamber 55 is preferably installed on the upper surface of the right side of the combustion chamber 40 in which the burner 60 is installed. The path through which the high-temperature gas travels becomes long, thereby improving the thermal efficiency.

A plurality of heat sinks (41) are coupled to the upper surface of the combustion chamber (40). The heat sinks 41 are coupled in parallel at regular intervals. The heat of the combustion chamber 40 is discharged to the inner space of the heat insulating case 20 through the heat sink 41 as well as the surface of the combustion chamber 40. Since the heat rises upward, the top surface of the combustion chamber 40 is the hottest. Therefore, it is most effective to provide the heat sink 41 on the upper surface of the combustion chamber 40.

The association (50) is disposed on the upper part of the heat insulating case (20). The association 50 is a passage through which the hot gas discharged from the combustion chamber 40 passes. In this embodiment, the associations 50 are arranged in two rows, and a plurality of associations 50 are arranged in zigzags at regular intervals in each column.

In this embodiment, the first associations 51, which are associations in the rows below, extend horizontally from the first chamber 55. The other ends of the first associations (51) are communicated with a second combustion chamber (56) coupled to the left inner wall of the heat insulating case (20). The exhaust gas having passed through the first associations 51 flows into the second combustion chamber 56. The exhaust gas flowing into the second combustion chamber 56 moves to the third combustion chamber 57 provided on the right side of the heat insulating case 20 through the second associations 52 which are the associations of the upper row.

The burner (60) is installed on the side surface of the heat insulating case (20). The burner 60 is a device for burning solid fuel mixed with air. Flames generated as the fuel is burned are radiated into the combustion chamber 40. The burner 60 acts as a heat source for the hot air 100.

2 is a schematic view of the burner shown in Fig. 2, the burner 60 includes a grate 61 for supporting a solid fuel, a fuel supply pipe 62 for supplying solid fuel on the grate 61, A supply section 79, a ignition flame guide pipe 63 having one opened end directed toward the solid fuel, a nozzle (not shown) provided in the ignition flame guide pipe 63 and radiating fuel for ignition in the direction of solid fuel An ignition plug 65 for igniting the ignition fuel injected from the nozzle 64 and a diffusion plate 65 provided on the downstream side of the internal nozzle 64 for the ignition flame guide pipe 63 do. The configuration of the grate 61 of the burner 60, the end of the ignition flame guide pipe 63 and the end of the fuel supply pipe 62 are arranged inside the combustion chamber 40.

The grate 61 is made of a plurality of pieces through which air can pass and in which a plurality of air holes are formed in which the ash generated when the solid fuel is burned is formed. In this embodiment, the grate is a stepped grate, and some grate is a movable grate that drops ashes while moving to the left and right. The movement of the grate 61 can be done by the cylinder 67 connected to the motor. The first grate segment 61a disposed at the most upstream position where the solid fuel firstly meets is disposed obliquely, so that the solid fuel is easily dispersed in the remaining grate segments arranged in a stepwise manner below. The second grate segment 61b in which the greatest amount of solid fuel is dropped consists of a movable type. When the second grate piece 61b is retracted, the material accumulated in the second grate piece 61b falls to the third grate piece 61c, and when the second grate piece 61b is moved forward, (61d). The ash accumulated on the grate slices down through the vents and accumulates on the ash placed below the grate.

The grate 61 is surrounded by a flame guide 68. The flame guide 68 surrounds both sides and the upper portion of the grate 61 so that the flame is radiated toward the front side. The flame is radiated to the front by using the flame guide 68 and the first combustion chamber 55 provided on the combustion chamber 40 is biased to the side where the burner 60 is installed, The first combustion chamber 55 and the second combustion chamber 55. In the first combustion chamber 55,

The fuel supply pipe 62 serves to supply solid fuel to the grate 61. A fuel supply port (69) is formed in the fuel supply pipe (62). The fuel supply port 69 can be connected to a silo in which the fuel is stored. An outlet of the fuel supply pipe (62) is disposed above the grate (61). A fuel feed screw (70) is installed in the fuel feed pipe (62). The solid fuel introduced through the fuel supply port 69 of the fuel supply pipe 62 is transferred to the outlet by the fuel transfer screw 70 and falls on the grate 61. An anti-backfire blower may be installed at one end of the fuel supply pipe 62 opposite to the outlet thereof.

The ignition flame guide pipe 63 serves to supply air necessary for combustion of the ignition fuel and to guide the generated flame toward the solid fuel. At the inlet side of the ignition flame guide pipe (63), a pressurized blower (71) for supplying air is provided.

The nozzle 64 is installed inside the ignition flame guide pipe 63. The nozzle 64 serves to inject a jet fuel such as oil or gas. In the case where the ignition fuel to be injected is a liquid such as oil, a device such as a pump and a filter is installed. In the case of gas, a device such as a shut-off valve may be installed.

The ignition plug 65 serves to ignite the ignition fuel. The ignition plug 65 may be installed in front of the end of the nozzle 64 inside the ignition flame guide pipe 63. The flame generated by the ignition of the ignition fuel is used to ignite the solid fuel which is the main fuel disposed on the grate 61.

The diffusion plate 66 is provided on the downstream side of the inner nozzle 64 of the ignition flame guide pipe 63. In the present invention, the upstream side and the downstream side are based on the direction in which the air flows. The diffusion plate 66 serves to mix the ignition fuel and air so that the ignition fuel can be completely combusted.

3 is a perspective view of the diffusion plate shown in Fig. 3, the diffuser plate 66 includes a bottom wall 661 facing the nozzle 64 and a side wall 662 extending obliquely away from the bottom wall 661 in a direction away from the nozzle 64 do. The diffusion plate 66 is coupled to the ignition flame guide pipe 63 in such a manner that the end of the side wall 662 is welded to the inner surface of the ignition flame guide pipe 63.

A circular through hole 663 through which the oil sprayed from the nozzle 64 can pass is formed in the center of the bottom wall 661 of the diffuser plate 66. A guide vane 664 is formed around the circular through hole 661 of the bottom wall 661 so as to rotate the air in one direction. The guide vane 664 cuts the bottom wall 661 from the through hole 663 in the outer circumferential direction of the bottom wall 661 and forms the bottom wall 661 in the direction of the nozzle 64 by folding. A plurality of wedge-shaped through holes 665 are formed in the side wall 662 of the diffusion plate 66. A square through hole 666 is formed at the end of the diffusion plate 66. The air having passed through the bottom wall 661 of the diffuser plate 66 is rotated by the structure of the diffuser plate 66 and mixed with the air introduced through the side wall 662 to form a vortex. As a result, the oil injected from the nozzle 64 is mixed well with the air and completely burned.

Fig. 4 is a view for explaining the combustion air supply portion 79 of the burner shown in Fig. 2 and 4, the combustion air supply unit 79 serves to supply the air required for combustion of the solid fuel to the grate 61 side. The combustion air supply unit 79 includes an air supply pipe 73, a first air chamber 74, a second air chamber 75 and blowers 731, 741 and 751 for supplying air to the air chamber.

The first air chamber 74 is disposed at the rear end of the grate 61. The surface of the first air chamber 74 facing the grate 61 is open. The air introduced into the first air chamber 74 flows down the grate 61 through the open front. The first air chamber 74 allows air having a weak wind pressure to flow totally toward the grate 61.

The air inlet pipe 73 is disposed below the inside of the first air chamber 74. A plurality of through holes 732 are formed in the air inlet pipe 73 in the direction toward the grate 61. The through holes 732 are formed along the longitudinal direction of the air inlet pipe 73 in two rows. The distance between the through holes 732 becomes larger toward the downstream side (the direction opposite to the blower). The rows below provide air horizontally, while the other rows provide air at an angle. The wind pressure of the air supplied through the air inlet pipe 73 is higher than the pressure of the air supplied by the first air passage 74.

The ratio of the flow rate of the air supplied by the first air cylinder 74 to the flow rate of the air supplied by the air supply pipe 73 is preferably from 6: 4 to 8: 2 for the complete combustion of the solid fuel.

The second air chamber (75) is disposed above the first air chamber (74). Unlike the first air cylinder 74, a plurality of through holes 752 are formed in the second air cylinder 75. The air introduced through the second air cylinder (75) passes through the through hole (752) and is supplied onto the grate (61).

The air supplied by the first air cylinder 74 and the air supply pipe 73 is supplied from below the grate 61 and the air supplied by the second air chamber 75 is supplied onto the grate 61.

The present invention can provide the combustion air supply portion 79 of such a structure to keep the amount of the air supplied for combustion of the solid fuel constant, thereby completely burning the solid fuel.

The associative cleaning device 80 serves to automatically remove dust accumulated in the transversely arranged association 50 using compressed air.

5 and 6 are views showing the associated cleaning apparatus shown in FIG. 5 and 6, the associated cleaning device comprises four compressed air chambers 81 provided in the second combustion chamber 57 and two compressed air chambers 81 extending in the compressed air chamber 81 toward each of the associations 50 A compressed air injection nozzle 82, an air tank 83 in which compressed air is stored, a hose 84 connecting the compressed air chamber 81 to the air tank 83, and a valve (Not shown). A solenoid valve can be used as the valve.

In this embodiment, seven compressed air injection nozzles 82 are provided in each of the compressed air chambers 81, and the ends of the respective compressed air injection nozzles 82 are spaced apart by about 10 mm from the ends of the associations 50 I will face you.

The air tank 83 is provided with an air inlet 85 through which compressed air flows, an outlet 86 through which air is discharged, and four compressed air discharge ports 87. The compressed air discharge port 87 is connected to the compressed air chamber 81 through a hose 84, respectively.

When the cleaning is required, the valve provided in the hose 84 is opened, and high-pressure compressed air is supplied to each association 50 through the compressed air chamber 81 and the compressed air injection nozzle 82. The dust accumulated in the association (50) is pushed by the compressed air. The dust pushed out from the first associations 51 is dropped down the combustion chamber 40 and then removed by the reprocessing apparatus described later. The dust pushed out from the second associations 52 is collected in the dust collector of the exhaust gas processing device 90, which will be described later.

Referring again to FIG. 1, the hot air stream further includes a reprocessing device. The reprocessing system automatically collects the ash that has fallen from the combustion chamber. The reprocessing apparatus includes a re-collecting cylinder 25 disposed below the combustion chamber 40 and a re-transporting screw 26 and a re-transporting screw 26 transported by the re- And a reservoir 27 in which ashes are stored.

Further, the hot air blower further includes an exhaust gas processing device 90. [ The exhaust gas treatment device 90 is connected to the third combustion chamber 57 to remove dust and ashes contained in the combustion gas to discharge the purified gas to the outside. The exhaust gas treatment device 90 includes a dust collector for removing dust and ash and a collecting container for collecting dust and ash removed. The exhaust gas from which the dust and ashes are removed is discharged to the outside through the exhaust port.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined in the appended claims. You will understand.

100: Heat wind
20: Heat insulation case 21: Hot air outlet
25: Re-collecting box 26: Retransfer screw
27: reservoir 30: blower
40: combustion chamber 41: heat sink
50: association 51: first association
52: second association 55: first runner
56: second room 57: third room
60: Burner 61: Grate
62: fuel supply pipe 63: ignition flame guide pipe
64: nozzle 65: spark plug
66: diffuser plate 67: cylinder
68: Flame guide 69: Fuel supply port
70: fuel feed screw 71: pressurized blower
73: air inlet pipe 74: first air reservoir
75: second air cylinder 80: associative cleaning device
81: Compressed air chamber 82: Compressed air injection nozzle
83: air tank 84: hose
90: Exhaust gas treatment device

Claims (14)

A heat insulating case having a hot air discharge port formed therein,
A combustion chamber provided inside the heat insulating case,
A plurality of connections provided in the heat insulating case and communicating with the combustion chamber,
A burner which is provided on one side of the heat insulating case and mixes the solid fuel with air to burn the solid fuel and radiates a flame generated when the solid fuel is burned into the combustion chamber,
And a blower installed on one side of the heat insulating case to supply air into the heat insulating case. The air introduced into the heat insulating case by the blower is heated through heat exchange between the combustion chamber and the heat exchanger, As the hot air discharged through the discharge port,
The burner
A grate supporting the solid fuel,
A fuel supply pipe for supplying solid fuel onto the grate,
A first air reservoir for supplying air down the grate through an open surface facing the grate,
An air inlet pipe installed in the first air cylinder and supplying air to the lower portion of the grate through a plurality of through holes formed toward the grate,
A second air cylinder for supplying air over the grate through a plurality of through holes formed in a surface facing the grate,
An ignition flame guide tube whose one end is opened so as to face the solid fuel,
A nozzle disposed inside the ignition flame guide tube for radiating fuel for ignition in a solid fuel direction;
An ignition plug for igniting the ignition fuel injected from the nozzle,
A bottom wall facing the nozzle and a sidewall extending obliquely from the bottom wall in a direction away from the nozzle, the bottom wall being provided in the ignition flame guide pipe downstream of the nozzle, And a guide plate for guiding a flow of the air and a plurality of penetrating slits in the form of wedges are formed on the side wall,
And a rectangular through hole is formed at an end of the diffusion plate. The method according to claim 1,
Wherein the ratio of the flow rate of the air supplied by the first air passage to the flow rate of the air supplied by the air inlet pipe is 6: 4 to 8: 2. The method according to claim 1,
And the distance between the through-holes of the air inlet pipe increases toward the downstream side. The method according to claim 1,
And a plurality of heat sinks are installed on the upper surface of the combustion chamber. The method according to claim 1,
A chamber communicated with the association,
A plurality of compressed air chambers installed in the combustion chamber and supplied with compressed air,
Further comprising an associated cleaning device having a compressed air injection nozzle extending toward each of the associations in the compressed air chamber. A grate supporting the solid fuel,
A fuel supply pipe for supplying solid fuel onto the grate,
A first air reservoir for supplying air down the grate through an open surface facing the grate,
An air inlet pipe provided in the first air cylinder for supplying high air beneath the grate through a plurality of through holes formed toward the grate,
A second air cylinder for supplying air over the grate through a plurality of through holes formed in a surface facing the grate,
An ignition flame guide tube whose one end is opened so as to face the solid fuel,
A nozzle disposed inside the ignition flame guide tube for radiating fuel for ignition in a solid fuel direction;
An ignition plug for igniting the ignition fuel injected from the nozzle,
A bottom wall facing the nozzle and a sidewall extending obliquely from the bottom wall in a direction away from the nozzle, the bottom wall being provided in the ignition flame guide pipe downstream of the nozzle, And a guide plate for guiding a flow of the air and a plurality of penetrating slits in the form of wedges are formed on the side wall,
And a square through hole is formed at an end of the diffusion plate. The method according to claim 6,
Wherein the ratio of the flow rate of the air supplied by the first air passage to the flow rate of the air supplied by the air inlet pipe is 6: 4 to 8: 2. The method according to claim 6,
Wherein a distance between the through holes of the air inlet pipe increases toward the downstream side. delete delete delete delete delete delete

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