KR101823645B1 - Boiler having oxygen supply fuction and operating method thereof - Google Patents

Abstract

The present invention relates to a boiler having an oxygen supply function and an operating method thereof and, more specifically, relates to a boiler having an oxygen supply function, which comprises: a burner which receives an oxidizer therein, burns inputted fuel, and discharges combustion exhaust gas; an air heat exchanger which transfers heat between introduced indoor air and the combustion exhaust gas discharged from the burner to heat the indoor air; an oxygen separation module which allows the indoor air discharged from the air heat exchanger to flow thereinto, separates oxygen in the indoor air, and supplies the oxygen to an indoor space; and a heat exchanger which allows a heating medium introduced through a supply line to be heated by the combustion exhaust gas discharged from the air heat exchanger.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a boiler having an oxygen-

The present invention relates to a boiler having an oxygen producing function and a working method thereof.

Fig. 1 shows the construction of a conventional boiler. As shown in FIG. 1, a general household / commercial boiler 1 burns fuel to produce hot water, and uses it to supply hot water and heating.

That is, air, which is an oxidant, flows into the combustor 10 through the blower 2 so that the fuel injected by the fuel supply means 3 is burned, thereby heating the feed water in the heat exchanger 50 by the generated high- Thereby producing hot water.

However, when heating the office, the sports facility, the home, etc. through such a boiler, the ventilation is restricted in order to prevent the heat loss. In this case, the oxygen concentration is lowered. FIG. 2 is a table summarizing the effects of the oxygen concentration on the human body. As shown in FIG. 2, when the oxygen concentration falls below the reference value, it is felt to be frustrating, and dizziness symptoms, increase in respiration rate, and the like may occur.

Generally, the temperature used for heating is 120 degrees or less, and the temperature of the combustion gas generated through combustion is very high.

Therefore, it has been required to develop a boiler capable of supplying oxygen to the room simultaneously with the production of hot water by using the remaining heat of the combustion gas for oxygen production, while maintaining the temperature of the combustion gas at the temperature for heating the water supply.

Korea Patent No. 1135642 Korean Patent No. 0835363 Korean Patent Publication No. 2002-0006471 Japanese Patent Laid-Open No. 2005-134102

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a method and apparatus for producing oxygen using an Oxygen Transport Membrane, It is possible to produce hot water by supplying oxygen to the room after first operating the oxygen separation membrane by using the high-temperature combustion gas discharged from the combustion and mixing the low-oxygen air and the combustion gas into the heat exchanger for hot water / And a boiler having an oxygen production function and a method of operating the boiler.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. It can be understood.

A first object of the present invention is to provide a boiler for producing hot water by heating a feed water by a flue gas, comprising: a combustor for supplying an oxidant to the inside of the boiler to burn the injected fuel to discharge combustible gas; An air heat exchanger in which indoor air to be introduced and a combustible gas discharged from the combustor are heat-exchanged and room air is heated; An oxygen separation module that receives indoor air discharged from the air heat exchanger to separate oxygen in the indoor air and supply the separated indoor air to the indoor space; And a heat exchanger for generating hot water by heating the feed water introduced through the feed water line by the combustible gas discharged from the air heat exchanger.

The air conditioner may further include an oxidizer supply means for supplying the oxidizer to the combustor, and an indoor air supply means for introducing the indoor air into the air heat exchanger.

The oxygen separation module may include an oxygen discharge unit for discharging the separated oxygen to the indoor space and an indoor air discharge pipe for discharging the room air from which a part of oxygen is removed, and the indoor air discharged through the indoor air discharge pipe May be introduced into the heat exchanger together with the combustion gas discharged from the air heat exchanger.

The indoor air supply means may be a blower or a compressor.

And a power generation unit provided on the combustion gas inflow end side of the heat exchanger and generating power through a part of the combustion gas.

A second object of the present invention is to provide a method of operating a boiler, comprising the steps of: supplying an oxidizing agent to the interior of a combustor and burning the injected fuel to discharge a combustible gas; The indoor air flowing into the air heat exchanger and the combusted gas discharged from the combustor are heat-exchanged to heat indoor air; The indoor air discharged from the air heat exchanger flows into the oxygen separation module to separate oxygen in the indoor air and supply the separated indoor air to the indoor space; And a method for operating a boiler having an oxygen-producing function, characterized by comprising the step of heating the feed water flowing into the heat exchanger through the feed water line to produce hot water, have.

The method may further include the step of supplying the oxidizing agent to the combustor by the oxidizing agent supply unit and the step of introducing the room air into the air heat exchanger by the room air supplying unit.

Also, in the step of separating the oxygen and supplying the oxygen to the indoor space, oxygen separated through the oxygen discharging unit of the oxygen separating module is discharged to the indoor space, and part of oxygen is removed through the indoor air discharging pipe of the oxygen separating module Indoor air is discharged and indoor air discharged through the indoor air discharge pipe flows into the heat exchanger together with the combusted gas discharged from the air heat exchanger.

The method may further include, before the step of producing the hot water, the step of generating electricity by the power generation unit provided at the inlet side of the combustion gas inflow side of the heat exchanger, by absorbing a part of the heat of the combustible gas.

A third object of the present invention is to provide a boiler for producing hot water by heating a feed water by a combustible gas, comprising: a combustor for supplying indoor air to the inside of the boiler to burn the injected fuel to discharge combustible gas; An air heat exchanger in which indoor air to be introduced and a combustible gas discharged from the combustor are heat-exchanged and room air is heated; An oxygen separation module for separating the oxygen in the room air introduced into the room air into a room and introducing the partially deoxygenated room air into the combustor; And a heat exchanger for generating hot water by heating the feed water introduced through the feed water line by the combustible gas discharged from the air heat exchanger.

The air conditioner may further include a combustor cooling unit installed at one side of the combustor to cool the combustor into which the room air discharged from the air heat exchanger flows and to introduce the heated room air into the oxygen separation module.

The oxygen separation module may further include an oxygen discharge unit for discharging the separated oxygen to the indoor space and an indoor air discharge pipe installed between the oxygen separation module and the combustor for introducing the room air, And a plurality

The indoor air supply unit may include a compressor.

The apparatus may further include a power generation unit provided at a combustion gas inflow end side of the heat exchanger to generate electric power through a part of the combustion gas.

A fourth object of the present invention is to provide a method of operating a boiler, comprising the steps of: introducing indoor air introduced by indoor air supply means into an oxygen separation module through an air heat exchanger, separating oxygen and supplying the separated indoor space; The indoor air in which some oxygen is removed is injected into the combustor so that the fuel is burned to generate the combustion gas; In the air heat exchanger, the room air introduced by the room air supply means and the combusted gas discharged from the combustor are heat-exchanged to heat the room air; And a step of heating the feed water flowing through the feed water line by the combustible gas discharged from the air heat exchanger to produce hot water.

The indoor air discharged from the air heat exchanger may be introduced into the combustor cooling unit provided at one side of the combustor to cool the combustor and introduce the heated indoor air into the oxygen separation module .

Further, the power generation unit provided at the inlet side of the combustion gas of the heat exchanger may further include a step of generating electric power through a part of the combustion gas.

According to an embodiment of the present invention, oxygen production using an oxygen separation membrane (Oxygen Transport Membrane) increases efficiency as the temperature increases. Therefore, the oxygen separator is operated primarily by using the high temperature combustion gas discharged from the boiler Hot oxygen can be supplied to the room, and at the same time, the air having a low oxygen concentration and the combustible gas can be mixed and supplied to the hot water / heating heat exchanger to produce hot water.

It should be understood, however, that the effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those skilled in the art to which the present invention belongs It will be possible.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description, serve to further the understanding of the technical idea of the invention, It should not be construed as limited.
FIG. 1 is a schematic view of a boiler for producing hot water,
FIG. 2 is a table showing the human body effect according to the concentration of oxygen,
FIG. 3 is a view showing the construction of a boiler having an oxygen producing function according to the first embodiment of the present invention,
4 is a configuration diagram of a boiler having power generation and oxygen production functions according to the first embodiment of the present invention,
5 is a flow chart of a method of operating a boiler according to a first embodiment of the present invention;
6 is a configuration diagram of a boiler having an oxygen producing function according to a second embodiment of the present invention,
FIG. 7 is a view showing the construction of a boiler having power generation and oxygen production functions according to a second embodiment of the present invention;
8 shows a flowchart of a method of operating a boiler according to a second embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features, and advantages of the present invention will become more readily apparent from the following description of preferred embodiments with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art.

In this specification, when an element is referred to as being on another element, it may be directly formed on another element, or a third element may be interposed therebetween. Also in the figures, the thickness of the components is exaggerated for an effective description of the technical content.

Embodiments described herein will be described with reference to cross-sectional views and / or plan views that are ideal illustrations of the present invention. In the drawings, the thicknesses of the films and regions are exaggerated for an effective description of the technical content. Thus, the shape of the illustrations may be modified by manufacturing techniques and / or tolerances. Accordingly, the embodiments of the present invention are not limited to the specific forms shown, but also include changes in the shapes that are produced according to the manufacturing process. For example, the area shown at right angles may be rounded or may have a shape with a certain curvature. Thus, the regions illustrated in the figures have attributes, and the shapes of the regions illustrated in the figures are intended to illustrate specific forms of regions of the elements and are not intended to limit the scope of the invention. Although the terms first, second, etc. have been used in various embodiments of the present disclosure to describe various components, these components should not be limited by these terms. These terms have only been used to distinguish one component from another. The embodiments described and exemplified herein also include their complementary embodiments.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. The terms "comprises" and / or "comprising" used in the specification do not exclude the presence or addition of one or more other elements.

In describing the specific embodiments below, various specific details have been set forth in order to explain the invention in greater detail and to assist in understanding it. However, it will be appreciated by those skilled in the art that the present invention may be understood by those skilled in the art without departing from such specific details. In some instances, it should be noted that portions of the invention that are not commonly known in the description of the invention and are not significantly related to the invention do not describe confusing reasons to explain the present invention.

Hereinafter, the structure and function of the boiler 100 having the oxygen producing function according to the first embodiment of the present invention and the operation method thereof will be described. 3 is a block diagram of a boiler 100 having an oxygen production function according to a first embodiment of the present invention.

3, the boiler 100 having an oxygen producing function according to the first embodiment of the present invention includes an oxidizer supply means 5, a combustor 10, an indoor air supply means 4, an air heat exchanger (20), an oxygen separation module (30), a heat exchanger (50), and the like.

The combustor 10 supplies the oxidant to the inside of the combustor 10 through the oxidant supply means 5, and the injected fuel is burned to discharge the combustible gas.

In the air heat exchanger 20, the room air introduced by the room air supply means 4 and the combusted gas discharged from the combustor 10 are heat-exchanged. That is, indoor air is absorbed by the air heat exchanger 20 and heated by the heat of the combustion gas. As described later, the oxygen in the indoor air is separated from the oxygen separation module 30 and supplied to the indoor space. To increase the efficiency of the oxygen separation, the indoor air is introduced into the oxygen separation module 30, The indoor air is preheated through the indoor heat exchanger 20.

In addition, the oxidizing agent supply means 5 supplies the oxidizing agent to the combustor 10, and can be usually constituted by a blower, and the oxidizing agent can be air. The room air supply means 4 is for blowing room air into the air heat exchanger 20, and may be an air blower or a compressor.

In the oxygen separation module 30, the room air preheated and discharged by the air heat exchanger 20 flows into the room, and oxygen in the room air is separated to supply oxygen to the indoor space.

The oxygen separation module 30 includes an oxygen discharge portion 31 for discharging the separated oxygen to the indoor space and an indoor air discharge pipe 32 for discharging indoor air in which oxygen is partially removed.

That is, the oxygen separation module 30 selectively separates oxygen from the room air preheated through the air heat exchanger 20, the separated oxygen is supplied to the indoor space through the oxygen discharge portion 31, Is discharged to the heat exchanger (50) through the indoor air discharge pipe (32).

The specific configuration of the oxygen separation module 30 is not particularly limited as long as it has a function of selectively separating oxygen from the room air. In an exemplary embodiment, the oxygen separation module 30 may include a housing and an oxygen separation membrane. The oxygen separator is made of a composite ceramic having different composition, the material of the oxygen separator, it is particularly preferably made of a BSCF oxide _{(Ba 0. 5 Sr 0.} 5 Co 0. 8 Fe 0. 2 O 3 -δ).

This is because the BSCF oxide has a remarkably excellent performance in selectively separating oxygen. The composition of the oxygen separation membrane can be changed according to the intention of the user. The composition of the oxygen separation membrane is not particularly limited as long as it can selectively remove oxygen in the atmosphere.

As described above, since the room air introduced into the oxygen separation membrane is heated through the air heat exchanger 20, the oxygen in the room air can be selectively separated more effectively.

Further, the oxygen separation membrane has a thickness of 2.11 mm to 0.37 mm, so that oxygen in the room air can be selectively separated more effectively. This is because if the thickness of the oxygen separation membrane is less than 0.37 mm, the oxygen separation membrane may be damaged by physical impact. If the thickness of the oxygen separation membrane exceeds 2.11 mm, a higher degree of oxygen transmission This is because the high temperature is required and the efficiency is lowered.

Further, the housing serves to accommodate the oxygen separation membrane. It is noted that the shape of the housing is not particularly limited as long as it can accommodate the oxygen separation membrane therein, and it is possible to adopt various forms.

The heat exchanger 50 heats the water supplied through the water supply pipe 51 by the discharge gas discharged from the air heat exchanger 20 to produce hot water and discharge the hot water through the hot water pipe 52.

3, the room air discharged through the indoor air discharge pipe 32 of the oxygen separation module 30 and the combusted gas discharged from the air heat exchanger 20 together flow into the inlet pipe 53 To the heat exchanger (50), thereby heating the water supply.

The boiler 100 having the function of producing oxygen according to the first embodiment of the present invention is provided with the power generation unit 60 on the side of the combustion gas inflow pipe 53 of the heat exchanger 50, Lt; RTI ID = 0.0 > and / or < / RTI > FIG. 4 shows a configuration diagram of a boiler 100 having power generation and oxygen production functions according to the first embodiment of the present invention.

That is, the indoor air supply means 4 may be replaced by a compressor, and an inflator and a generator may be installed on one side of the inflow pipe 53 of the heat exchanger 50 to be capable of simultaneously producing electricity, hot water, have.

FIG. 5 shows a flowchart of a method of operating the boiler 100 according to the first embodiment of the present invention. First, the oxidant is supplied to the inside of the combustor 10, and the injected fuel is burned to discharge the combustible gas (S1).

The indoor air supplied to the air heat exchanger 20 by the indoor air supply means 4 and the combusted gas discharged from the combustor 10 are heat-exchanged in the air heat exchanger 20 (S2). As described above, since the combustion gas and the indoor air are heat-exchanged, the indoor air is preheated.

The indoor air discharged from the air heat exchanger 20 flows into the oxygen separation module 30 to selectively remove oxygen in the room air and supply the separated oxygen to the indoor space through the oxygen discharge portion 31, The indoor air from which the air is partially removed is discharged through the indoor air discharge pipe 32 and flows into the inflow pipe 53 together with the combustible gas passing through the air heat exchanger 20 (S3).

 The power generation unit 60 provided at one side of the combustion gas inflow pipe 53 of the heat exchanger 50 absorbs a part of the heat of the combustion gas to produce power (S4, S5).

The exhaust gas flowing through the power generation unit 60 flows into the heat exchanger 50 at step S6 and heats the incoming water through the water supply pipe 51 to produce hot water and the produced hot water passes through the hot water pipe 52 (S7), and is used for heating and hot water supply.

Hereinafter, the configuration, function, and operation method of the boiler 100 having the oxygen producing function according to the second embodiment of the present invention will be described. 6 is a block diagram of a boiler 100 having an oxygen production function according to a second embodiment of the present invention.

The boiler 100 having the oxygen producing function according to the second embodiment of the present invention includes the indoor air supply unit 4, the combustor 10, the air heat exchanger 20, the oxygen separation module 30, the heat exchanger 50, A combustor cooling unit 11, and the like. The second embodiment of the present invention differs from the first embodiment in that the indoor air supplied by the room air supply means 4 is supplied to the oxygen separation module 30 to be supplied to the combustor 10 as an oxidant in a state in which some oxygen is removed. In addition, the combustor cooling section 11 is provided on one side of the heat exchanger 50.

The combustor 10 according to the second embodiment of the present invention is supplied with indoor air in which oxygen is partially removed by the oxygen separation module 30 so that the injected fuel is burned to discharge the combustible gas. 6, room air discharged from the air heat exchanger 20 flows into the combustor 10 to cool the combustor 10, and the heated indoor air is supplied to the oxygen separation module 30 Respectively.

The room air introduced by the room air supply means 4 and the combusted gas discharged from the combustor 10 are heat-exchanged in the air heat exchanger 20 so that the room air is preheated. The room air preheated through the air-conditioner exchanger 20 is further heated while passing through the combustor cooling unit 11 as described above, and flows into the oxygen separation module 30. [ The heated indoor air is introduced into the oxygen separation module 30, thereby increasing the efficiency of oxygen separation.

The oxygen separation module 30 performs the function of selectively separating the oxygen in the room air, as mentioned above. The oxygen separating module 30 selectively removes the oxygen in the room air by introducing indoor air discharged through the air heat exchanger 20 and the combustor cooling unit 11 and supplies the separated indoor air through the oxygen discharging unit 31 And the room air in which oxygen is partially removed is introduced into the combustor 10 as an oxidant through the indoor air exposure pipe.

The flue gas discharged from the air heat exchanger 20 flows into the heat exchanger 50, heats the water supplied through the water supply line, and the generated hot water is discharged through the hot water pipe 52.

Also, the boiler 100 having the oxygen production function according to the second embodiment of the present invention can simultaneously perform the power generation function. FIG. 7 shows a configuration diagram of a boiler 100 having power generation and oxygen production functions according to a second embodiment of the present invention.

The boiler 100 having the function of producing oxygen according to the second embodiment of the present invention is provided with the power generation unit 60 on the combustion gas inflow pipe 53 side of the heat exchanger 50, Lt; RTI ID = 0.0 > and / or < / RTI > That is, the indoor air supply means 4 may be replaced by a compressor, and an inflator and a generator may be installed on one side of the inflow pipe 53 of the heat exchanger 50 to be capable of simultaneously producing electricity, hot water, have.

FIG. 8 shows a flowchart of a method of operating the boiler 100 according to the second embodiment of the present invention. First, the indoor air introduced by the indoor air supply means 4 flows into the oxygen separation module 30 through the air heat exchanger 20, and oxygen is separated and supplied to the indoor space through the oxygen discharge portion 31 S10).

The indoor air in which some oxygen is removed is introduced into the combustor 10 through the indoor air discharge pipe 32 so that the fuel is burned to generate the combustion gas (S20). In this combustion process, the combustor 10 is cooled through the combustor cooling unit 11 provided at one side, and the room air absorbs the heat of the combustor 10 before being introduced into the oxygen separation module 30, do.

In the air heat exchanger 20, the room air introduced by the room air supply means 4 and the combusted gas discharged from the combustor 10 are heat-exchanged (S30). That is, a part of the heat of the high temperature combustion gas discharged from the combustor 10 is absorbed by the room air before entering the oxygen separation module 30.

The power generation unit 60 provided at the side of the combustion gas inflow pipe 53 of the heat exchanger 50 produces electric power through a part of the combusted gas (S40). In addition, the water supplied through the water supply pipe 51 is heated by the discharge gas discharged from the electric power generating unit 60 to produce hot water (S50).

It should be noted that the above-described apparatus and method are not limited to the configurations and methods of the embodiments described above, but the embodiments may be modified so that all or some of the embodiments are selectively combined .

1: Boiler
2: blower
3: fuel supply means
4: Indoor air supply means
5: oxidant supply means
10: Combustor
11: Combustor cooling section
20: Air heat exchanger
30: Oxygen separation module
31: oxygen discharge portion
32: Indoor air discharge pipe
50: heat exchanger
51: Water supply pipe
52: Hot water pipe
53: inlet pipe
60:
100: boiler with oxygen production function

Claims (17)

A boiler for heating a heating medium by a combustion gas,
A combustor for supplying the oxidant to the inside and discharging the combusted gas by burning the injected fuel;
An air heat exchanger in which indoor air to be introduced and a combustible gas discharged from the combustor are heat-exchanged and room air is heated;
An oxygen separation module that receives indoor air discharged from the air heat exchanger to separate oxygen in the indoor air and supply the separated indoor air to the indoor space; And
And a heat exchanger in which the heating medium introduced through the supply line is heated by the combustion gas discharged from the air heat exchanger,
Wherein the oxygen separation module includes an oxygen discharge portion for discharging the separated oxygen to the indoor space and an indoor air discharge pipe for discharging the indoor air from which a part of oxygen is removed and the indoor air discharged through the indoor air discharge pipe And the air is introduced into the heat exchanger together with the combustion gas discharged from the air heat exchanger.
[Claim 2 is abandoned upon payment of the registration fee.] The method according to claim 1,
An oxidizer supply means for supplying the oxidizer to the combustor, and an indoor air supply means for introducing the indoor air into the air heat exchanger.
delete [Claim 4 is abandoned upon payment of the registration fee.] 3. The method of claim 2,
Wherein the indoor air supply means comprises a blower or a compressor.
5. The method of claim 4,
And a power generation unit provided at the inlet side of the combustion gas of the heat exchanger and generating power through a part of the combustion gas.
In a method of operating a boiler,
Supplying the oxidizing agent to the inside of the combustor and burning the injected fuel to discharge the combustible gas;
The indoor air flowing into the air heat exchanger and the combusted gas discharged from the combustor are heat-exchanged to heat indoor air;
The indoor air discharged from the air heat exchanger flows into the oxygen separation module to separate oxygen in the indoor air and supply the separated indoor air to the indoor space; And
Wherein the combustible gas discharged from the air heat exchanger flows into the heat exchanger and heats the heating medium introduced through the supply line,
Wherein the oxidizing agent is supplied to the combustor by an oxidizing agent supply means, and the indoor air is introduced into the air heat exchanger by the indoor air supplying means,
In the step of separating the oxygen and supplying it to the indoor space,
The oxygen separated through the oxygen discharging unit of the oxygen separation module is discharged to the indoor space and the room air in which oxygen is partially removed through the indoor air discharge pipe of the oxygen separation module is discharged, Wherein the indoor air is introduced into the heat exchanger together with the combustion gas discharged from the air heat exchanger.
delete delete The method according to claim 6,
Before heating the heating medium,
Further comprising the step of generating power by a power generation unit provided at a combustion gas inflow end side of the heat exchanger by absorbing a part of the heat of the combustible gas.
A boiler for heating a heating medium by a combustion gas,
A combustor for supplying the indoor air to the inside and discharging the combusted gas by burning the injected fuel;
An air heat exchanger in which indoor air to be introduced and a combustible gas discharged from the combustor are heat-exchanged and room air is heated;
An oxygen separation module for separating the oxygen in the room air introduced into the room air into a room and introducing the partially deoxygenated room air into the combustor; And
And a heat exchanger for heating the heating medium introduced through the supply line by the discharge gas discharged from the air heat exchanger.
11. The method of claim 10,
Further comprising a combustor cooling unit installed at one side of the combustor for introducing room air discharged from the air heat exchanger to cool the combustor and to introduce heated indoor air into the oxygen separation module. Boiler.
12. The method of claim 11,
The oxygen separation module may include an oxygen discharge unit for discharging the separated oxygen to the indoor space and an indoor air discharge pipe provided between the oxygen separation module and the combustor for introducing indoor air having partially removed oxygen to the combustor Wherein the boiler has an oxygen production function.
[13] has been abandoned due to the registration fee. 13. The method of claim 12,
Wherein the indoor air supply means is constituted by a compressor.
14. The method of claim 13,
And a power generation unit provided at the inlet side of the combustion gas of the heat exchanger and generating power through a part of the combustion gas.
In a method of operating a boiler,
The indoor air introduced by the indoor air supply means flows into the oxygen separation module through the air heat exchanger to separate the oxygen and supply it to the indoor space;
The indoor air in which some oxygen is removed is injected into the combustor so that the fuel is burned to generate the combustion gas;
In the air heat exchanger, the room air introduced by the room air supply means and the combusted gas discharged from the combustor are heat-exchanged to heat the room air;
And heating the heating medium introduced through the supply line by the discharge gas discharged from the air heat exchanger.
16. The method of claim 15,
The indoor air discharged from the air heat exchanger flows into the combustor cooling unit provided at one side of the combustor to cool the combustor and to introduce the heated indoor air into the oxygen separation module. Operating the boiler.
17. The method of claim 16,
Further comprising a step in which the power generation unit provided at the combustion gas inflow end side of the heat exchanger generates electric power through a part of the combustion gas.

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