KR101148696B1 - Wood-pellet boiler - Google Patents

Abstract

A pellet boiler is disclosed.
The disclosed pellet boiler uses a pellet as a fuel to heat a heating object.
A primary combustion chamber in which the pellets are supplied and first burned; A secondary combustion chamber formed above the primary combustion chamber, the secondary combustion chamber being secondary burned while the pellets primary burned in the primary combustion chamber are raised; A tertiary combustion chamber which surrounds the secondary combustion chamber and warms the secondary combustion chamber while tertiary combustion is performed while the pellets secondary burned in the secondary combustion chamber are introduced; A fourth combustion chamber surrounding the tertiary combustion chamber and warming the tertiary combustion chamber, the fourth combustion chamber being fourth-fired while the pellets third-triggered in the tertiary combustion chamber are introduced; And a main body accommodating the heating object with the fourth combustion chamber while surrounding the fourth combustion chamber so that the heating object can be heated by the combustion heat of the pellets burnt through the fourth combustion chamber. Include.
According to the disclosed pellet boiler, the pellets can be continuously burned through the plurality of combustion chambers from the primary combustion chamber to the fourth combustion chamber, the primary combustion chamber and the secondary combustion chamber are kept warm by the tertiary combustion chamber, and the tertiary combustion chamber is It is warmed by the 4th combustion chamber, the heat is not directly transmitted to the heating object from the primary combustion chamber to the 3rd combustion chamber, but heat is directly transmitted from the 4th combustion chamber to the heating object, so that the heating object is directly burned while burning the pellets. Compared to the conventional way of delivering heat to the pellets, the pellets can be completely burned since they can be kept relatively high while the pellets are burning while passing through the first to fourth combustion chambers. Therefore, the combustion efficiency of the pellets can be improved, as well as the environmental pollution caused by the incompletely burned pellet particles released into the atmosphere can be prevented, and the incompletely burned pellet particles stick to the flue and become sticky as condensation. Flow down has the advantage that the pollution of the boiler can be prevented.

Description

Pellet Boiler {Wood-pellet boiler}

The present invention relates to a pellet boiler.

Pellet (wood-pellet) refers to a solid fuel produced through the process of crushing wood in the form of sawdust, drying, firing, cooling. Pellet boilers use hot water to produce hot water or supply heating.

Due to the low fuel costs of pellets, the demand for pellet boilers is increasing now.

However, according to the conventional pellet boiler, since the main component of the pellet is wood, and combustion occurs at a relatively low temperature compared to other solid fuels such as coal, the pellet is incompletely burned, and as a result, the combustion efficiency is lowered, and thus incomplete. Combusted pellet particles may be released into the atmosphere to cause environmental pollution, and the incompletely burned pellet particles may stick to the flue and condensate, causing sticky flow to contaminate the boiler.

It is an object of the present invention to provide a pellet boiler having a structure in which pellets can be completely burned.

Pellet boiler according to an aspect of the present invention is to heat the heating object using a pellet (wood-pellet) as a fuel,

A primary combustion chamber in which the pellets are supplied and first burned; A secondary combustion chamber formed above the primary combustion chamber, the secondary combustion chamber being secondary burned while the pellets primary burned in the primary combustion chamber are raised; A tertiary combustion chamber which surrounds the secondary combustion chamber and warms the secondary combustion chamber while tertiary combustion is performed while the pellets secondary burned in the secondary combustion chamber are introduced; A fourth combustion chamber surrounding the tertiary combustion chamber and warming the tertiary combustion chamber, the fourth combustion chamber being fourth-fired while the pellets third-triggered in the tertiary combustion chamber are introduced; And a main body accommodating the heating object with the fourth combustion chamber while surrounding the fourth combustion chamber so that the heating object can be heated by the combustion heat of the pellets burnt through the fourth combustion chamber. Include.

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According to the pellet boiler according to an aspect of the present invention, the pellet can be continuously burned through the plurality of combustion chambers from the primary combustion chamber to the fourth combustion chamber, and the primary combustion chamber and the secondary combustion chamber are insulated by the tertiary combustion chamber and The third combustion chamber is insulated by the fourth combustion chamber, and the heat is not directly transmitted to the heating object from the primary combustion chamber to the third combustion chamber but the heat is directly transmitted from the fourth combustion chamber to the heating object. Compared to the conventional method of directly transferring the heat to the heating object while burning, the pellet can be completely burned since the pellets can be kept relatively high while burning while passing through the primary to the fourth combustion chamber. Therefore, the combustion efficiency of the pellets can be improved, as well as the environmental pollution caused by the incompletely burned pellet particles released into the atmosphere can be prevented, and the incompletely burned pellet particles stick to the flue and become sticky as condensation. Flow down and the boiler is also effective to prevent the phenomenon of pollution.

According to the pellet boiler according to another aspect of the present invention, as the combustion product collecting chamber opening and closing door is opened, the combustion product main collecting chamber and the combustion product sub collecting chamber can be opened together, so that the combustion product main collecting chamber and the combustion product sub collecting chamber are opened. Since external combustion can be accessed together for each combustion product deposited on the outside, there is an effect that an external worker can easily clean the combustion products deposited in the combustion product main collection chamber and the combustion product sub collection chamber, respectively.

According to the pellet boiler according to another aspect of the present invention, the blower blows the outside air into the primary combustion chamber, and sends the pellet to the outside air supplied to the inside of the primary combustion chamber, together with the external air into the primary combustion chamber As the pellets are supplied, the pellets may be simply supplied to the primary combustion chamber, and the structure for pellets may be simplified.

According to the pellet boiler according to another aspect of the present invention, since a part of the outside air can be supplied to at least one of the third combustion chamber and the fourth combustion chamber through a blower, complete combustion of the pellets in the third combustion chamber and the fourth combustion chamber There is a possible effect.

According to the pellet boiler according to another aspect of the present invention, as the blower extension supplies the pellets with the outside air in an eccentric direction from the center of the primary combustion chamber, it can cause vortex in the primary combustion chamber, There is an effect that the combustion of the pellets in the combustion chamber can be made more smoothly.

1 is a vertical cross-sectional view showing the configuration of a pellet boiler according to an embodiment of the present invention.
Figure 2 is a horizontal cross-sectional view showing the internal structure of the pellet boiler according to an embodiment of the present invention.
Figure 3 is a vertical sectional view showing the operation of the pellet boiler according to an embodiment of the present invention.
Figure 4 is a horizontal cross-sectional view showing a connection between the blower and the primary combustion chamber in a pellet boiler according to an embodiment of the present invention.

Hereinafter, a pellet boiler according to an embodiment of the present invention will be described with reference to the drawings.

1 is a vertical cross-sectional view showing the configuration of a pellet boiler according to an embodiment of the present invention, Figure 2 is a horizontal cross-sectional view showing the internal configuration of a pellet boiler according to an embodiment of the present invention, Figure 3 is 4 is a vertical cross-sectional view showing the operation of the pellet boiler according to an embodiment, Figure 4 is a horizontal cross-sectional view showing a connection relationship between the blower and the primary combustion chamber in the pellet boiler according to an embodiment of the present invention.

1 to 4 together, the pellet boiler 100 according to the present embodiment is the primary combustion chamber 110, the secondary combustion chamber 120, the tertiary combustion chamber 130, the fourth combustion chamber 140 ), Falling flue 150, rising flue 160, main body 170, combustion product main collection chamber 180, combustion product sub collection chamber 181, hot water supply member 190, Including a blower 200, a pellet supply member 210, and a pellet receiving chamber 220, a wood-pellet 20 is used as a fuel to heat a heated object 10 such as water. Heat.

The primary combustion chamber 110 is the blower 200 is connected, the outside air supplied by the blower 200 and the pellet 20 is the primary combustion. For this primary combustion, an ignition member 111 is installed in the primary combustion chamber 110. The ignition member 111 may be applied by way of ignition using an electric spark, and is connected by an external power source (not shown) and the wire 112 to enable such ignition.

The secondary combustion chamber 120 is formed so as to communicate with the upper side of the primary combustion chamber 110, the secondary combustion as the pellet 20 is first burned in the primary combustion chamber 110 is raised. A partition wall 121 may be formed between the primary combustion chamber 110 and the secondary combustion chamber 120 in which a hole in which the pellet 20 may be raised is formed.

The tertiary combustion chamber 130 covers the primary combustion chamber 110 and the secondary combustion chamber 120 while being spaced apart from the primary combustion chamber 110 and the secondary combustion chamber 120 by a predetermined distance. 110 and may form a shape surrounding the secondary combustion chamber 120. The tertiary combustion chamber 130 may be formed to cover the side of the primary combustion chamber 110 and the secondary combustion chamber 120 as well as the upper end of the secondary combustion chamber 120 while being spaced apart by a predetermined distance. Then, the tertiary combustion chamber 130 may insulate the primary combustion chamber 110 and the secondary combustion chamber 120, and between the secondary combustion chamber 120 and the tertiary combustion chamber 130. The pellet 20 which is secondary burned while being raised in the secondary combustion chamber 120 is introduced through the gap portion formed in the third combustion chamber.

The fourth combustion chamber 140 may be formed to surround the third combustion chamber 130 while being spaced apart from the side surface of the third combustion chamber 130 by a predetermined distance. Then, the fourth combustion chamber 140 may insulate the third combustion chamber 130, and together with the third portion through an interval portion formed between the third combustion chamber 130 and the fourth combustion chamber 140. The pellet 20, which is thirdly burned while descending from the secondary combustion chamber 130, is introduced and is fourthly burned as it is raised.

The lower end of the third combustion chamber 130 and the lower end of the fourth combustion chamber 140 have an open shape, and the pellets 20 which are lowered in the third combustion chamber 130 while being third burned are opened. It may be introduced into the fourth combustion chamber 140 through the portion.

Reference numeral 131 denotes a support for connecting the tertiary combustion chamber 130 and the fourth combustion chamber 140 to support the tertiary combustion chamber 130.

The upper end of the fourth combustion chamber 140 has an open shape and is sequentially covered by the first fourth combustion chamber cover 141 and the second fourth combustion chamber cover 142 disposed at positions spaced apart from each other. The first 4th combustion chamber cover 141 and the second 4th combustion chamber cover 142 may open and close the 4th combustion chamber 140, respectively, the first 4th combustion chamber cover 141 and the first When the 2nd 4th combustion chamber cover 142 covers the 4th combustion chamber 140, an air layer is formed between the 1st 4th combustion chamber cover 141 and the 2nd 4th combustion chamber cover 142, and such an air layer and The fourth combustion chamber 140 may be kept warm by the first fourth combustion chamber cover 141 and the second fourth combustion chamber cover 142. Then, while the access for cleaning, repair, etc. for the inside of the fourth combustion chamber 140 is easy, heat loss inside the fourth combustion chamber 140 can be minimized.

The main body 170 forms a shape surrounding the fourth combustion chamber 140 while being spaced apart from the fourth combustion chamber 140 by a predetermined distance, and the heating object 10 between the fourth combustion chamber 140 and the fourth combustion chamber 140. To accept. Then, the heating object 10 accommodated in the main body 170 may be heated by the combustion heat of the pellets 20 combusted via the fourth combustion chamber 140.

Reference numeral 171 denotes a main body inlet pipe through which the heating object 10 flows into the main body 170, and reference numeral 172 denotes a main body outflow that flows out after the heating object 10 is heated inside the main body 170. It is a tube.

The primary combustion chamber 110 to the fourth combustion chamber 140 and the main body 170 may each have a cylindrical shape.

In addition, in the secondary combustion chamber 120 to the fourth combustion chamber 140, a separate ignition member is not provided, and the first combustion is ignited by the ignition member 111 in the primary combustion chamber 110. The portion of the pellet 20 that has not yet been burned and the embers remaining in the pellet 20 may be flowed together, and combustion may be performed by the remaining embers.

The falling flue 150 communicates with an upper portion of the fourth combustion chamber 140 and extends while descending the inside of the heated object 10 in the main body 170, and thus, the fourth combustion chamber 140 is provided. The fuel containing the combustion products formed by burning the pellets 20 while passing through is to be lowered. The falling year 150 may be made of a plurality.

Since the falling flue 150 is formed in the form of falling in the heating object 10, the heat of the smoke falling along the falling flue 150 may be recovered to the heating object 10.

The rising year 160 is the smoke that is dropped through the falling year 150 is collected and raised, outflow to the outside. The rising year 160 is also in contact with the heating object 10, and as the smoke rises through the rising year 160, heat in the smoke may be recovered to the heating object 10.

When configured as described above, the pellet 20 can be continuously burned through the plurality of combustion chambers from the primary combustion chamber 110 to the fourth combustion chamber 140, and the primary combustion chamber 110 and the The secondary combustion chamber 120 is insulated by the tertiary combustion chamber 130, the tertiary combustion chamber 130 is insulated by the fourth combustion chamber 140, and the primary combustion chambers 110 to the tertiary. Since the heat is not directly transmitted from the combustion chamber 130 to the heating object 10, the heat is directly transmitted from the fourth combustion chamber 140 to the heating object 10, and thus the pellet is directly heated while burning the pellets. Compared with the conventional method of transmitting the heat to the object 10, since the pellet 20 is combusted while passing through the primary combustion chamber 110 to the fourth combustion chamber 140 can be maintained relatively high temperature, The pellet 20 can be completely burned have. Therefore, the combustion efficiency of the pellet 20 can be improved, and environmental pollution caused by incompletely burned pellet particles released into the atmosphere can be prevented, and the incompletely burned pellet particles are stuck to the flue and condensed. This can prevent sticking down and polluting the boiler.

On the other hand, since the lower end of each of the third combustion chamber 130 and the fourth combustion chamber 140 has an open shape, the combustion product and the combustion product formed while the pellet 20 is burned up to the third combustion chamber 130. Combustion products formed while the pellets 20 are combusted in the secondary combustion chamber 140 may be dropped through the open lower ends of the tertiary combustion chamber 130 and the fourth combustion chamber 140. Is the combustion product main collection chamber 180.

The combustion product main collection chamber 180 may be formed at the lower portion of the main body 170 in a form of being wrapped while being spaced apart from the lower portion of the primary combustion chamber 110 by a predetermined distance, and the third combustion chamber 130 as described above. ) And combustion products falling through each open lower end of the fourth combustion chamber 140. In addition, the combustion product main collection chamber 180 heats the lower portion of the primary combustion chamber (110).

A combustion product sub collection chamber 181 is formed below the falling flue 150, and the falling flue 150 of the combustion products formed while the pellet 20 burns while passing through the fourth combustion chamber 140. Combustion products passing through are received as they fall. The combustion product sub-collection chamber 181 is formed to communicate with each other in the form of a donut, so that the combustion products falling in each of the plurality of falling flue 150 is accommodated, so as to rise through the rising flue (160).

The combustion product main collection chamber 180 and the combustion product sub collection chamber 181 may be opened at a portion connected to each other, and the open portion may be opened and closed by the combustion product collection chamber opening and closing door 182. Open portions of the combustion product main collection chamber 180 and the combustion product sub collection chamber 181 and the combustion product collection chamber opening and closing doors 182 may be provided along a circumference of the combustion product main collection chamber 180. Can be formed.

When configured as described above, by opening the combustion product collection chamber opening and closing door 182, the combustion product main collection chamber 180 and the combustion product sub-collection chamber 181 can be opened together, the combustion product Since each combustion product deposited in the main collection chamber 180 and the combustion product sub collection chamber 181 can be accessed from the outside together, an external worker can access the combustion product main collection chamber 180 and the combustion product section. The combustion products deposited in the collection chamber 181 can be easily cleaned.

The hot water supply member 190 may supply hot water to a hot water demand destination, and includes a hot water heat exchanger 192, a hot water coolant inlet pipe 191, and a hot water coolant outlet pipe 193.

The hot water supply heat exchanger 192 is disposed in the main body 170, for example, in the form of being immersed in the heating object 10 above the main body 170 to exchange heat with the heating object 10. Both ends of the hot water supply heat exchanger 192 are connected to the hot water supply refrigerant inlet pipe 191 and the hot water supply refrigerant outlet pipe 193, respectively, and are wound a predetermined number of times along the upper inner wall of the main body 170. It may be made in the form.

The hot water supply refrigerant inlet pipe 191 introduces the circulating coolant flowed from the hot water supply demand source into the hot water supply heat exchanger 192.

The hot water coolant outlet pipe 193 supplies the circulating coolant heat-exchanged with the heating object 10 to the hot water supply demand while passing through the hot water heat exchanger 192.

The blower 200 includes a fan arranging unit 201 in which a blower fan and a driving motor are disposed, an electric wire 202 connecting the driving motor in the fan arranging unit 201 to an external power source (not shown), and the fan. A blower extension 203 extending from the placement unit 201 and communicating with the fan placement unit 201 and the primary combustion chamber 110 through the primary combustion chamber 110 and the pellet 20; A pellet supply pipe 204 and an external air inlet pipe 205 supplied into the blower extension 203 are included.

When the driving motor in the fan disposition unit 201 is driven, the blower fan is rotated to suck the outside air, and the sucked external air flows into the blower extension unit 203 communicating with the fan disposition unit 201. .

The pellet supply pipe 204 is a tube capable of dropping the pellets 20 into the blower extension 203, and the pellet 20 passes through the pellet supply pipe 204 to the blower extension 203. When dropped, the dropped pellet 20 is loaded into the outside air flowing in the blower extension 203 and is supplied to the primary combustion chamber 110 together with the outside air.

As described above, the blower 200 blows the external air into the primary combustion chamber 110, and sends the pellet 20 to the external air supplied into the primary combustion chamber 110, As the pellets 20 are supplied together with the external air into the primary combustion chamber 110, the pellets 20 may be simply supplied to the primary combustion chamber 110, as well as the pellets 20. The structure for supply can be simplified.

The external air inlet pipe 205 has one end thereof disposed at a front side portion of the pellet supply pipe 204 based on the flow direction of the external air in the blower extension 203, and through the one end thereof. A part of the outside air flowing along the blower extension 203 is introduced, and the other end thereof penetrates to the outside of the blower extension 203 to protrude into the combustion product main collection chamber 180. . Then, the pellet 20 supplied through the pellet supply pipe 204 does not flow into the external air inlet pipe 205, but a part of the external air flowing in the blower extension 203 is The blower extension 203 may be discharged to the outside through the external air introduction pipe 205. The outside air leaked as described above is supplied to at least one of the third combustion chamber 130 and the fourth combustion chamber 140.

As described above, since at least one of the external air may be supplied to at least one of the third combustion chamber 130 and the fourth combustion chamber 140 through the blower 200, the third combustion chamber 130 and the four. Complete combustion of the pellets 20 may be possible in the secondary combustion chamber 140.

As shown in FIG. 4, the blower extension 203 supplies the pellet 20 together with the outside air in an eccentric direction from the center of the primary combustion chamber 110, thereby providing the primary combustion chamber ( Since the swirl may be induced in the 110, the combustion of the pellet 20 in the primary combustion chamber 110 may be more smoothly performed.

The pellet supply member 210 is installed on the pellet supply pipe 204, the wire 212 connecting the pellet supply driving motor 211 and the pellet supply driving motor 211 and an external power source (not shown). And a feed screw 213 which is rotated by the pellet supply driving motor 211 and supplies the pellet 20 along the pellet supply pipe 204 toward the blower extension 203, and the pellet supply driving motor. And a feed hole 214 formed between the 211 and the pellet feed pipe 204 to allow the pellet 20 to be supplied to the feed screw 213 to feed the pellet 20 into the pellet feed pipe 204. It is supplied toward the blower extension 203 through the).

The pellet supply pipe 204 in which the pellet supply member 210 is installed is formed on the blower extension 203 so that the pellet 20 can be smoothly supplied, and the pellet 20 is blower. The extension part 203 may be inclined at a predetermined angle in a direction opposite to the flow direction of the extension part 203.

The pellet receiving chamber 220 is to accommodate the pellet 20, the pellet supply member 210 is inserted into the lower portion, the pellet 20 in the pellet receiving chamber 220 is It may be supplied to the pellet supply pipe 204 through the pellet supply member 210.

Reference numeral 221 denotes a pellet receiving chamber opening / closing cover 221 that can open and close the pellet receiving chamber 220 in the case of replenishing the pellet 20 to the pellet receiving chamber 220.

Hereinafter, with reference to the drawings will be described the operation of the pellet boiler 100 according to an embodiment of the present invention.

First, when a driving motor in the fan arrangement unit 201 of the blower 200 is operated, the blower fan rotates to suck outside air, and the sucked outside air communicates with the fan arrangement unit 201. Flow through extension 203.

At this time, when the pellet supply drive motor 211 is operated, the pellet 20 in the pellet receiving chamber 220 is supplied into the blower extension 203 through the pellet supply pipe 204, The blower extension 203 is carried by the outside air flowing in the flow.

The outside air and the pellets 20 flowing as described above are introduced into the primary combustion chamber 110, and are ignited by the ignition member 111 of the primary combustion chamber 110 to be elevated while being primary combustion. The rise of the pellets 20 with the primary combustion may be due to the pressure provided by the blower 200 with the rise by its own heat.

The pellet 20 combusted as described above is introduced into the secondary combustion chamber 120 to be secondaryly burned while being raised along the inside of the secondary combustion chamber 120.

As described above, the pellet 20 which is secondary burned is introduced into the tertiary combustion chamber 130 and is burned tertiarily while descending along the tertiary combustion chamber 130.

The pellet 20 combusted as described above is introduced into the fourth combustion chamber 140, and is fourth-fired while being raised along the inside of the fourth combustion chamber 140. At this time, the combustion products in the smoke containing the pellet 20, the third combustion is dropped and collected in the combustion product main collection chamber 180.

In addition, outside air is introduced into at least one of the tertiary combustion chamber 130 and the fourth combustion chamber 140 through the external air introduction pipe 205, so that the tertiary combustion chamber 130 and the fourth combustion chamber ( Combustion at 140 may be facilitated.

As described above, the smoke including the combustion product formed after the pellet 20 is completed by the fourth combustion is lowered through the falling flue 150. At this time, the combustion products formed during the fourth combustion as described above and the pellets 20 are not completely dropped into the combustion product main collection chamber 180 are completely collected in the combustion product sub collection chamber 181.

The heat of combustion of the pellets 20 may be absorbed by the heating object through the fourth combustion chamber 140 and the falling flue 150, and the heating object may be heated. The heated object heated as described above is supplied to the demand destination outside the pellet boiler 100 through the main body outlet pipe 172, and the heated object passed through the demand destination is re-introduced through the main body inlet pipe 171.

As described above, the smoke lowered through the falling year 150 is raised through the rising year 160 and discharged to the outside.

While the invention has been shown and described with respect to specific embodiments thereof, those skilled in the art can variously modify the invention without departing from the spirit and scope of the invention as set forth in the claims below. And that it can be changed. However, it is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

According to the pellet boiler according to an aspect of the present invention, since the pellet can be completely burned, it is said that the industrial applicability is high.

Claims (6)

A pellet boiler in which a heating object is heated by using pellets as fuel,
A primary combustion chamber in which the pellets are supplied and first burned;
A secondary combustion chamber formed above the primary combustion chamber, the secondary combustion chamber being secondary burned while the pellets primary burned in the primary combustion chamber are raised;
A tertiary combustion chamber which surrounds the secondary combustion chamber and warms the secondary combustion chamber while tertiary combustion is performed while the pellets secondary burned in the secondary combustion chamber are introduced;
A fourth combustion chamber surrounding the tertiary combustion chamber and warming the tertiary combustion chamber, the fourth combustion chamber being fourth-fired while the pellets third-triggered in the tertiary combustion chamber are introduced; And
And a main body accommodating the heating object with the fourth combustion chamber while surrounding the fourth combustion chamber so that the heating object is heated by the combustion heat of the pellets burnt while passing through the fourth combustion chamber. Pellet boiler. The method of claim 1,
The lower part of the third combustion chamber and the fourth combustion chamber are opened so that the combustion products formed while the pellet is combusted may fall.
The pellet boiler
A combustion product main collection chamber containing the combustion product falling through the open lower portion of the third combustion chamber and the fourth combustion chamber;
A falling flue in communication with an upper portion of the fourth combustion chamber and formed to extend while descending the inside of the heating object;
A combustion product sub collection chamber accommodating combustion products via the falling flue of the combustion products formed while the pellet is combusted while passing through the fourth combustion chamber; And
A combustion product collection chamber opening / closing door which opens and closes the combustion product main collection chamber and the combustion product sub collection chamber together so that the combustion product main collection chamber and the combustion product housed in the combustion product sub collection chamber are accessible together from the outside; Pellet boiler comprising a. The method of claim 1,
A hot water heat exchanger disposed in the main body to exchange heat with the heating object;
A hot water coolant inflow pipe for introducing a circulating coolant flowing from a hot water demand source to the hot water heat exchanger;
And a hot water supply member including a coolant outlet pipe for supplying the circulating coolant heat-exchanged with the heating object to the hot water supply demand while passing through the hot water heat exchanger. The method of claim 1,
The pellet boiler
While blowing the outside air into the primary combustion chamber, so that the pellet can be burned in the primary combustion chamber, the pellet is carried in the external air supplied into the primary combustion chamber, the inside of the primary combustion chamber And a blower for supplying the pellet together with the outside air. The method of claim 4, wherein
And the blower supplies the pellets together with the outside air in an eccentric direction from the center of the primary combustion chamber so that a vortex can be formed in the primary combustion chamber. The method of claim 4, wherein
The blower is a pellet boiler, characterized in that for supplying a part of the external air to at least one of the third combustion chamber and the fourth combustion chamber.

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