KR101141911B1 - Burner in wood steam boiler - Google Patents

Abstract

PURPOSE: A combustion device of a firewood fired boiler is provided to minimize a dead zone where air is not supplied, thereby maintaining a heating value of high temperature. CONSTITUTION: A combustion device of a firewood fired boiler comprises a firebox, a brass stone, an air supplying device, and a cold water supplying device. The brass stone comprises a body(31) and cold water pipe(32). The body comprises an air supplying chamber having an air inlet(314). The cold water pipe comprises horizontal pipes(324) and vertical pipes(323). The horizontal pipes comprising an water outlet(322) and water inlet(321) are formed in the front and rear sides of the body. The vertical pipes are connected to the horizontal pipe and formed on a surface of the body at a predetermined interval. A connected water passage of a triangular shape is formed in the inner side of the cold water pipe. Air discharging holes passing through from the surface of the body to the air supplying chamber is formed between the vertical pipes are formed at a predetermined interval.

Description

BURNER IN WOOD STEAM BOILER}

The present invention relates to a combustion apparatus of a boiler using firewood as fuel, and in particular, a brass stone is installed at a lower part of a firebox to serve as a water-cooled grate, and the brass stone has an air discharge port penetrated through the bottom and sealed air inside. The coolant pipe protruding in a triangular shape between the main body formed to be connected to the supply chamber and the air discharge port of the body surface and configured to flow the coolant therein is integrally formed so that the combustion material does not flow out to the lower part of the firebox by the blocked bottom. It is related with the combustion apparatus of the firewood boiler which reduced the complete combustion and smoke generation of a firewood by eliminating the blind spot of an air supply by separating the air supply outlet by the cooling water pipe which protruded by the triangle.

Fossil fired boilers using waste wood as raw materials can improve energy recovery efficiency and safely manage incineration and gaseous substances generated during combustion, and can be eco-friendly and resource-recycling, compared to conventional fossil fuels or petroleum fuels. It can be a heat source production method.

Regarding waste wood Like other countries in the world, Korea also maintains the state of solid wood or mechanically processed wood, and classifies waste wood that is not contaminated with paint oil preservatives during processing. Waste wood containing paint, oil, concrete, etc. used or contaminated (except waste wood treated with halogenated organic compounds or preservatives) Class 2, halogenated organic compounds or preservatives used during processing Waste wood and waste wood chips that do not meet the quality class standards of solid fuel products in Article 20-3 (2) of the Enforcement Regulations on the Conservation and Recycling of Resources and other waste wood not falling under the above 1-2 grades. To recover the energy in accordance with the energy recovery standards for all 1 to 3 levels by classifying It is stipulated to be recycled (Recycling Standard of Waste Wood, Enforcement 2008.10.21, Ministry of Environment Notification No. 2008-147, 2008.10.21, enacted).

According to these regulations, the energy recovery standard of Article 3, Paragraph 1 of the Enforcement Regulations of the Waste Management Act "1. The low calorific value of the waste, not mixed with other substances, shall be more than 3,000 kilocalories per kilogram 2. Energy recovery efficiency (recovery energy) The total amount divided by the total input energy) should be 75% or more. 3. If all of the recovered heat is used as a heat source or supplied to others, the waste wood as fuel can be used. Firewood boilers are proposed and used.

The coal fired boiler is composed of a main body having a horizontal or vertical shape, a combustion chamber where combustion is performed by inputting firewood, a firewood combustion apparatus installed in the combustion chamber, and a water chamber comprising a hot water chamber or a steam chamber installed to absorb heat from the combustion chamber and the flue; It comprises a rear end facility that separates and removes dust and harmful gas from flue gas, a water supply facility for supplying water to a water chamber, and various safety valves and sensors. Recently, cooling water is applied to overheated parts such as a grate constituting a combustion device. The cooling water supply device and structure which supplies and prevents heat deformation are included and used.

In addition, in the existing coal fired boilers, the coal fired combustion apparatus supplies a grate serving as a combustion support for the firewood, an air supply device for providing combustion air to the grate, and a cooling water supply to cool the grate to prevent thermal deformation due to overheating of the grate. It is configured to include a device.

In addition, the stop constituting the grate in order to prevent the combustion disturbance by the combustion material is made of a lattice structure formed to have a constant interval so that the combustion material exits to the lower portion. In addition, an air supply chamber and an air discharge port are formed in the grid or a method of supplying combustion air in the fire chamber by installing an air supply pipe under the grate separately from the grid and using a cooling water pipe surrounding the air discharge port to prevent thermal deformation of the grate. The structure to install is used.

Republic of Korea Patent Registration No. 10-0977751 (August 18, 2010) is shown in Figure 1a and 1b, "The air supply unit 7 is a blower (8) and the air transport pipe (9) installed on the outside of the steam boiler (1) An air duct 10 connected through the width direction is provided across the front inner side of the firebox 2 in the width direction, and a plurality of air supply pipes 11 are spaced side by side in the horizontal direction at a predetermined interval on the rear portion of the air duct 10. Installed and many of the above

The two air supply pipes 11 are installed in the longitudinal direction along the inside of the fire chamber 2 in a state in communication with the air duct 10, respectively, in a state spaced apart at a predetermined interval on the outside of the respective air supply pipes (11) The inner side of each of the protection pipes 12 are circulated and supplied with the heat-transmitting water, and a plurality of air discharge pipes 13 are vertically communicated with the upper surface of the air supply pipe 11 at regular intervals along the air supply pipe 11. And the plurality of air discharge pipes 13 are delivered in a state of penetrating through the outer protection pipes 12 so that each of the air discharge pipes 13 and the air supply pipes 11 are circulated and supplied to the inside of the protection pipes 12. In-house grate structure, which is not thermally deformed by the thermal cutoff.

In the above structure, the combustion apparatus includes a gasket installed in the firebox, a blower for supplying air to the air outlet formed in the grate, and an air supply pipe installed at the inlet of the firebox, and a protective tube that surrounds and protects the air discharge pipe 13 installed in the grate ( 12) consists of a cooling water supply device (circulation pump, 18) for supplying cooling water (heating water), the combustion device by the grate structure is composed of a direct contact with the firewood injected into the air discharge pipe (13). Therefore, some air outlets are blocked when the air supply is blocked in combustion, resulting in blind spots of the air supply, resulting in incomplete combustion, soot smoke is generated, and the total amount of heat generated cannot be maintained. There is a problem that does not sufficiently suppress harmful gases such as dioxins.

In addition, the lattice-type grate is essentially formed in the gap between the braces, and combustion residues (wood chips, nails, etc.) generated continuously accumulate under the firebox. Therefore, the combustion residue accumulated in the narrow gap between the grate and the firebox should be periodically removed and discharged. Therefore, the operation must be stopped and the highly difficult removal work should be performed periodically. In particular, a phenomenon in which combustion material is injected through the air discharge pipe 13 and accumulates from the end of the air supply pipe 11 periodically occurs, and in this case, a suction pipe is inserted into the inlet side of the air supply pipe 11 to remove and suck the firewood. Adsorbent materials such as wood vinegar generated during the process eventually closes the air discharge pipe 13, so there is a disadvantage in that the maintenance cost is high, such as having to replace the whole.

In addition, the structure is the combustion by the air supply by the air discharge pipe 13 and the air supply pipe 38 installed in the fire door in the state of closing the opening and closing door (3) after burning the firewood in the firebox. Therefore, there is a disadvantage in that it is difficult to maintain the calorific value uniformly, such as the combustion occurs in the state in which the opening and closing doors are closed after the caloric material is temporarily put in, and the calorific value difference between the initial and late stages of the caloric input is generated.

In addition, the structure has a problem that the combustion is made in the state that the support grid is supported by the grid prop, the deflection of the prop easily occurs due to the high temperature and the weight of the fossil is applied to the prop has a problem that the overall durability is reduced.

KR 10-0977751 (2010.8.18)

An object of the present invention is to propose a firewood boiler combustion apparatus that maintains complete combustion and high temperature calorific value by minimizing blind spots of air supply by separating air discharge ports and firewood.

In addition, the present invention is to ensure that combustion residues such as lumber chips or nails do not leak to the lower part of the combustion chamber, but are accumulated on the exposed brass stone floor so that combustion materials such as flammables do not occur inside the combustion chamber, and non-combustible residues such as nails are easily removed. It is possible to provide, and the purpose of the present invention is a wood-fired boiler combustion device that is used for combustion as the oil component generated in the combustion process such as wood vinegar solution.

In addition, the present invention has an object of presenting a firewood boiler combustion apparatus having a structure that can be easily discharged even when the fine material such as the combustion material is introduced into the air supply chamber through the air discharge port.

In addition, the present invention induces complete combustion by making a uniform combustion supply in the lower part of the combustion chamber and the upper part of the combustion chamber through the entire combustion chamber space, and the combustion is made in the open state of the open / close door so that the uniform supply of firewood and the resulting uniformity It is an object of the present invention to propose a firewood boiler combustion apparatus capable of maintaining a calorific value.

The firewood boiler combustion apparatus according to the present invention presented for the above object comprises: a firebox in which combustion of injected firewood is made; A brass stone installed under the firebox and acting as a grate; An air supply device for supplying combustion air to the brass stone and the firebox; And a cooling water supply device for supplying cooling water to the brass stone and the superheater in the firebox. The combustion device of the firewood boiler includes: a box-shaped body in which an air supply chamber having an air inlet is formed; Each of the horizontal pipes having water outlets and water inlets are formed to protrude on the front and rear sides of the main body, and vertical tubes formed at regular intervals on the upper surface of the main body so as to be connected to the front and rear horizontal pipes. A coolant pipe having a continuous water passage; and formed between the vertical pipes of the protruding coolant pipes at a predetermined interval, an air discharge port penetrating from the surface of the main body to the air supply chamber is supplied through the air inlet; Is distributed and discharged through the air discharge port, which is secured by the cooling water pipe formed by the triangular shape to be used for combustion of firewood, and the cooling water supplied from the cooling water supply device through the inlet port flows through the cooling water pipe on the main body to eliminate overheating. Characterized in that configured to be used in.

In addition, the present invention comprises an air induction pipe extending from the air inlet connected to the air inlet and the opening and closing port formed on the inlet opening side in the configuration of the air supply chamber of the brass stone, the injection air in the closed state Is discharged through the air discharge port is used for combustion, and is discharged through the opening and closing opening and the air discharge port in the state of opening and closing the opening to present a coal fired boiler combustion apparatus characterized in that the fine dust introduced through the air discharge port to be used for discharge removal. do.

In addition, the present invention is characterized in that the upper air supply pipe formed with an air outlet over the entire length side by side with the brass stone on the upper side of the firebox to be connected to the air supply device so that combustion air is simultaneously supplied from the lower side of the firebox and the upper part of the firebox. Present a firewood boiler combustion device.

In addition, the present invention proposes a firewood boiler combustion apparatus characterized by reducing the damage caused by thermal deformation of the upper air supply pipe by integrally configuring the upper air supply pipe and the cooling water pipe.

The present invention is a combustion apparatus applicable to a firewood boiler using a firewood as a fuel, such as an industrial firewood steam boiler, a boiler for industrial and domestic firewood heating, and the combustion surface is protected by a triangular coolant pipe protruding from the main body surface to effectively prevent thermal deformation. Inhibition can be blocked.

In addition, the air discharge port is formed between the protruding triangular cooling water pipes and protected so that they are not blocked in contact with the firewood, and a proper space is provided between the firewood and the brass stone surface to minimize the blind area of the air supply and to secure the space necessary for combustion. Thus, complete combustion and high temperature calorific value are maintained, and the effect of suppressing harmful gas generation by high temperature combustion is improved.

In addition, the present invention has a structure in which the bottom of the brass stone is blocked, and combustion residues such as wood chips and nails are accumulated on the exposed brass stone floor without being leaked to the lower part of the combustion chamber. Therefore, combustible materials such as lumber waste or wood vinegar can be used for the entire combustion to minimize the generation of combustion materials, and non-combustible residues such as nails can be easily removed from the exposed space.

In addition, the present invention is the air induction pipe is formed in the inner air supply chamber of the brass stone, the opening and closing port is formed on the side of the inlet port is the air injected through the air induction pipe is reflected from the inner wall of the air supply chamber is discharged to the air outlet or open orifice opening Emitted through. Therefore, when fine materials such as combustion materials are introduced into the air supply chamber through the air outlet, it can be easily discharged to the outside by injecting high pressure air into the inlet and minimizing boiler downtime for cleaning. It offers the advantage of easy maintenance such as cleaning in the state.

In addition, the brass stone is a structure in which the box-shaped plate member and the cooling water pipe protruding in a triangular shape are integrated to prevent sagging or deformation due to high temperature heat and weight of firewood.

In addition, the present invention by installing the air supply pipe in parallel with the brass stone in the upper part of the combustion chamber by the uniform combustion supply in the lower part of the combustion chamber and the upper part of the combustion chamber through the entire combustion chamber space, complete combustion is possible, It is possible to supply the firewood uniformly, and to maintain a uniform calorific value.

1a and 1b is a structural diagram of a combustion apparatus structure and grate of a conventional firewood boiler
2 is a configuration diagram applying a coal fired combustion apparatus according to the present invention to a general firewood boiler
3 is a perspective view showing the embodiment of the brass stone according to the present invention
4a to 4c is a cross-sectional structural view of the brass stone according to the embodiment
5a and 5b is an air supply state display for cleaning and air supply for combustion
Figure 6 is an embodiment of an upper air discharge pipe combustion chamber

The present invention is a boiler body (10) and: the firebox 20 is made of combustion of the injected firewood; A brass stone 30 installed below the firebox and serving as a grate; An air supply device 40 including the brass stone to supply combustion air to the inside of the firebox; It is applied to the combustion apparatus of the firewood boiler comprising a; the cooling water supply device 50 for supplying the cooling water to the superheated portion, including the brass stone.

The brass stone 30 according to the present invention includes: a box-shaped main body 31 in which an air supply chamber 311 having an air inlet 314 is formed therein; Each having a water outlet 322 and an inlet 321, the horizontal pipe 324 protruding in the front and rear of the main body, and the vertical pipe formed at regular intervals on the upper surface of the main body so as to be connected to the front and rear horizontal pipe 324 ( And a cooling water pipe 32 having a triangular continuous conduit therein by protruding the 323 in a triangular shape on the surface of the main body, and between the vertical pipes 323 of the protruding cooling water pipe from the surface of the main body. An air discharge port 312 having a space secured by a cooling water pipe in which air of the air supply device 50 supplied through the air injection hole is formed at a predetermined interval and is formed at a predetermined interval through the air discharge port 311. Dispersion is discharged through and used for burning of firewood, and the cooling water supplied from the cooling water supply device through the inlet is flowed through the cooling water pipe on the surface of the main body to be used for overheating. And that is characterized.

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The boiler body 10 may be configured in various forms such as vertical or horizontal, and the firebox is determined according to the shape of the body. That is, in the case of the vertical main body, the firebox is formed in a cylindrical or box shape perpendicular to the center of the main body and is connected to the flue 11 for exhausting at the distal end, and in the case of the horizontal type, the firebox is formed below the center of the main body. It consists of a cylindrical or box-shaped and is connected with the flue 11 for flue gas at the distal end.

The illustrated embodiment illustrates a horizontal cylindrical firebox applied to the horizontal body structure, the flue 11 is formed at the end of the cylindrical firebox, the water chamber 12 is formed on the outer periphery of the firebox, the flue is S-shaped It is a structure that penetrates into the rear end facility 13 and is connected to the rear end facility 13 so that the heat of combustion of the firewood generated in the firebox is absorbed and heated by the water filled in the water chamber 12 in the outer periphery of the firebox, thereby producing steam directly or using a heat exchanger (not shown). It is composed of firewood boiler by taking hot water or heating water.

The brass stone 30 is a device that supports combustion and makes combustion, and may be implemented in various forms according to the shape of the firebox. For example, if the firebox is made of a vertical cylindrical shape is made of a disk shape, if the firebox is made of a vertical box shape, it is made of a square plate shape accordingly. In addition, when the firebox is configured in a horizontal cylinder or a horizontal box shape, it may be configured as a rectangular box that can be placed on the lower portion of the firebox.

The brass stone 30 has a main body 31 formed to correspond to the shape of the fire chamber, and a triangular coolant pipe 32 protruding from the main body surface is integrally formed with the main body.

The main body 31 has an air supply chamber 311 sealed therein, and the air discharge port 312 penetrates the surface 313 to be connected to the air supply chamber 311.

The cooling water pipe 32 is formed to protrude in a triangular shape between the air discharge port of the surface bottom of the body and is configured to flow the cooling water therein.

The air supply chamber 311 is connected to the air supply device 40 through the air inlet 314 formed in the main body, the coolant pipe 32 is a cooling water supply device connected to the inlet 321 and the outlet 322 ( 50) causes the cooling circulating water to flow.

The air supply device 40 includes one or more blowers 41 and a blower pipe 42 to supply air for combustion to the firebox, and the blower pipe 42 is connected to the air inlet 314 of the main body 31. The air supply through the brass stones is achieved by the connection.

Cooling water supply device 50 is composed of a circulation pump 51 consisting of one or more, the storage tank 52 and the circulation water supply pipe 53 for circulating supply of cooling water, the storage tank 52 is an external water supply pipe network ( 53) is configured to maintain a certain amount of water level automatically.

Figure 3 shows the external structure of the brass stone applied to the firebox composed of a horizontal cylindrical, Figures 4a to 4c also shows a cross-sectional structure of the brass stone according to the embodiment.

The brass stone 30 shown by the embodiment according to the illustrated, the body 31 is formed in a box shape, the air supply chamber 311 is formed inside the body, the air discharge port 312 is the surface 313 It is connected to the air supply chamber 311, the air inlet 314 connected to the air supply device 40 is formed in front of the air supply chamber. The coolant pipe 32 has a horizontal pipe 324 formed to protrude in a triangle on the upper surface and both sides of the body, and a vertical pipe 323 protruding in a triangle on the front and rear surfaces of the main body connecting each horizontal pipe. And, it is composed of the water outlet 322 and the water inlet 321 formed in the front and rear horizontal pipe is connected to the cooling water supply device 50, respectively.

Therefore, the air discharge ports 312 formed on the surface of the main body are formed at regular intervals between the vertical pipes 323 formed in the longitudinal direction side by side. In addition, the air discharge port 312a is uniformly formed between the vertical pipe 323a formed on both sides and the outer vertical pipe 323b formed on the upper surface.

As shown in FIGS. 4B and 4C, when air is injected into the air supply chamber 311 through the air inlet 314 connected to the air supply device, the injected air is formed between the cooling water pipes 32. It is discharged through the 312 is used for combustion, and at the same time the coolant is injected into the inlet 321 by the coolant supply device 50, the injected coolant is discharged to the outlet 322 via the coolant pipe 32 The cycle prevents overheating on the brass stone surface.

Cooling water pipe 32 is formed in a triangular cross-sectional shape protruding from the body surface to prevent the blockage of the air discharge port 312 caused by the firewood is in direct contact with the air discharge port 312, space spaced between the firewood and the brass stone And maintain the line contact rather than the surface contact. Accordingly, even when irregularly shaped firewood is inserted in irregular shape, air outlet is not blocked and maintains its function, so it is possible to supply uniform combustion air without blind spots, and it is possible to maintain complete combustion and high fire power by securing combustion space required for firewood. have.

In addition, since the air discharge port 312a is uniformly formed between the vertical pipes 323a formed on both sides and the outer vertical pipes 323b formed on the upper surface, sufficient air is supplied to both sides of the firebox border portions of the brass stones. Enable complete combustion.

The bottom surface of the brass stone remains clogged so that combustion residues such as lumber debris and nails do not flow out of the lower part of the combustion chamber, but accumulate on the exposed brass floor. Among them, combustible materials such as lumber debris and wood vinegar are used for all combustion. Few ashes are collected internally, and non-combustible residues such as nails can be easily removed from the exposed space.

In addition, the present invention is used for the injection air is discharged to the air discharge port in the state of closing the opening and closing is used for combustion, and discharged through the opening and opening and the air discharge opening in the state that the opening and closing opening is used to remove the dust introduced through the air discharge opening Included configurations are included.

To this end, the present invention, in the air supply chamber 311 of the brass stone, formed in the air induction pipe 315 and the inlet side extending from the inlet 314 connected to the air supply device 40 to the inside The opening and closing port 316 is formed.

The air induction pipe 315 extends to the end wall of the air supply chamber 311, and the opening and closing hole 316 is formed at both sides of the injection hole 314.

5a and 5b are for explaining the operation of the air supply chamber, the air injected through the air induction pipe is reflected from the inner end wall of the air supply chamber is discharged to the air discharge port or discharged through the open orifice opening. Therefore, when fine material such as combustion material flows into the air supply chamber through the air discharge port, opening and closing the opening and injecting high-pressure air into the injection port allows the discharged combustion material to be easily discharged to the outside to keep the air discharge port open. It is possible to minimize the downtime of the boiler for cleaning, and this cleaning function can be performed even in the running state, which provides easy maintenance.

The present invention also proposes a configuration in which combustion air is simultaneously supplied from the lower part of the firebox and the upper part of the firebox for the complete combustion of the firewood in the firebox.

In order to achieve the above object, the present invention, as shown in Figure 6, the upper air discharge pipe 60 is formed in parallel with the brass stone 30 in the upper part of the firebox, the air discharge port 61 is formed over the entire length By connecting with the air supply device 40 is characterized in that the combustion air is supplied at the same time from the lower chamber and the upper chamber.

In addition, in order to alleviate the shortening of life due to heat deformation of the upper air discharge pipe 60, the cooling water pipe 70 is integrally formed with the upper air discharge pipe 60.

In the illustrated embodiment, the upper air discharge pipe 60 is configured as a semi-circular pipe to form an air discharge port 61 over the entire length, and a semicircular cooling water pipe 70 is integrally formed thereon, and each air By connecting to the supply device 40 and the cooling water supply device 50, the heat dissipation effect is achieved by circulating the cooling water in the state where combustion is caused by air supply, thereby eliminating thermal deformation.

The upper air discharge pipe 60 may be formed in one line on the upper part of the firebox, and may be formed in two lines as shown.

In the firebox, the air supply by the brass stones and the air supply by the upper air discharge pipe are simultaneously performed by the upper air discharge pipe, so that the air is supplied without blind spots even under a firewood condition that is input in an irregular and complicated form. It is possible to burn the thermal power, so that it can provide the thermal power to remove and remove harmful substances such as dioxin, and to construct a high-efficiency firewood boiler by complete combustion, and to economically construct the rear end equipment for dust collection such as soot. can do.

The present invention by the above configuration has been described in the state applied to a firewood boiler having a horizontal firebox, but it is natural that a vertical firewood boiler can be applied to a firewood steam boiler, a home heating boiler, and various industrial boilers.

10: boiler body 11: flue
12: sink 13: finishing equipment
20: firebox
30: Brass Stone
31: main body 311: air supply chamber
312: air outlet 313: surface
314: air inlet 315: air induction pipe
316: opening and closing
32: cooling water pipe 321: water inlet
322: exit 323: vertical pipe
324: cross pipe
40: air supply device
41: blower 42: blower
50: cooling water supply device
51: circulation pump 52: water storage tank
53: circulating water supply pipe 54: external water supply pipe
60: upper air discharge pipe 61: air discharge port
70: cooling water pipe

Claims (4)

A firebox 20 in which combustion of injected firewood is made; A brass stone 30 installed below the firebox and serving as a grate; An air supply device (40) for supplying combustion air to the brass stone and the firebox; In the combustion apparatus of a firewood boiler comprising: a cooling water supply unit 50 for supplying cooling water to the brass stone and the superheater in the firebox, the brass stone 30, the air having an air inlet 314 A box-shaped main body 31 having a supply chamber 311 formed therein; Each having a water outlet 322 and an inlet 321, the horizontal pipe 324 protruding in the front and rear of the main body, and the vertical pipe formed at regular intervals on the upper surface of the main body so as to be connected to the front and rear horizontal pipe 324 ( And a cooling water pipe 32 having a triangular continuous conduit therein by protruding the 323 in a triangular shape on the surface of the main body, and between the vertical pipes 323 of the protruding cooling water pipe from the surface of the main body. An air discharge port 312 having a space secured by a cooling water pipe in which air of the air supply device 50 supplied through the air injection hole is formed at a predetermined interval and is formed at a predetermined interval through the air discharge port 311. Dispersion is discharged through and used for burning of firewood, and the cooling water supplied from the cooling water supply device through the inlet is flowed through the cooling water pipe on the surface of the main body to be used for overheating. Combustion apparatus for harmony boiler, characterized in that.
The method according to claim 1,
The air supply chamber 311 of the brass stone includes an air induction pipe 315 extending from the air inlet 314 to the inside and an opening and closing port 316 formed on the side of the air inlet 314, and the opening and closing hole 316 is closed. Injected air is discharged to the air discharge port 312 is used for combustion, and is discharged through the opening and closing opening and the air discharge port in the state that the opening and closing the opening is characterized in that configured to remove the dust introduced through the air discharge port Combustion device of firewood boiler.
The method according to claim 1 or 2,
The upper air discharge pipe 60 having the air discharge port 61 formed over the entire length is installed in the upper part of the firebox in parallel with the brass stone 300 and connected to the air supply device 40 so that combustion air is simultaneously generated from the lower part of the firebox and the upper part of the firebox. Combustion apparatus of firewood boiler characterized in that the supply
The method according to claim 3,
The upper air discharge pipe 60 and the cooling water pipe 70 are integrally formed and connected to the air supply device 40 and the cooling water supply device 50, respectively, to reduce damage due to thermal deformation of the upper air discharge pipe 60. Combustion apparatus of a firewood boiler, characterized in that.

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