KR20200084508A - A Once-through Boiler Equipped with a Porous Medium Burner and its Operation Method - Google Patents

Abstract

The present invention relates to a once-through boiler having a porous combustor, and more specifically, to a once-through boiler having a porous combustor which reduces nitrogen oxide emission and enables uniform heating in a small once-through boiler or a small combustion type heating apparatus using gaseous fuel.

Description

A once-through boiler Equipped with a Porous Medium Burner and its Operation Method

The present invention relates to a perfusion boiler having a porous combustor, and more specifically, a porous perfusion body that reduces emission of nitrogen oxides and enables uniform heating in a small perfusion boiler or a small combustion heating device using gas fuel. It relates to a perfusion boiler equipped with a combustor and a method for operating the same.

Boiler is a device that transmits combustion heat of fuel to water to generate steam with high temperature and pressure, and is used to supply steam to steam engines, such as thermal power plants and ships, and work or heating devices of various factories.

Although there are several types of such boilers depending on their structure, among them, once-through boilers belonging to forced circulation boilers are only boilers made by bending a single water pipe or made of multiple water pipe bundles, and are also referred to as forced flow boilers. It refers to a boiler in which water is supplied from one end of the water pipe and pumped to the pump, which is heated, evaporated, and superheated one after the other to be sent as superheated steam from the other end of the pipe. It is a kind of advantageous forced circulation boiler in the case of.

Since the perfusion boiler has a small quantity, it is possible to start and stop quickly, and it is advantageous for miniaturization and high efficiency of the boiler since free heat transfer surface arrangement is possible. In addition, because of its simple structure and high safety, it is easy to automate, and when a large amount of steam is required, the number of small boilers are connected in parallel rather than using a single large boiler to control the number of units so that individual boilers operate at the design load with the highest efficiency. There are possible advantages.

On the other hand, in relation to the production of low nitrogen oxides (hereinafter referred to as NO _x ) to be achieved in the present invention, the perfusion boiler has a high volumetric heat load (combustion heat per unit volume) due to its compact structure, and thus high-temperature flame is formed. NO _x is generated, and the existing low NO _x combustion technology is very disadvantageous in reducing NO _x generation compared to other types of boilers because the required combustion chamber volume is not provided to exert the effect.

The NO _x generated in the combustion process of gaseous fuel includes thermal NO _x generated by oxidation of nitrogen in the air in a high-temperature (about 1300°C or higher) flame or burned gas, and a high concentration of high-temperature fuel (about 1000). Thermal decomposition at ℃ or higher) to produce a hydrocarbon radical (CH radical) and this can be divided into the prompt NO _x generated by reaction with nitrogen.

Thermal NO _x is generated in the high temperature region where excess oxygen is present, so that the temperature of the firebox is equalized so that the local high temperature region does not occur, and at the same time, by reducing the amount of excess oxygen in the root region of the flame where it is generated a lot, it is possible to suppress its production. Can.

On the other hand, prompt NO _x is relatively insensitive to temperature if it exceeds the thermal decomposition temperature of the fuel, and fuel and air are generated in the non-premixed combustion method because the fuel is generated instantaneously (within about 1 ms) in an excessively concentrated region. It can be rapidly mixed at the outlet end of the combustor to suppress its formation.

The nitrogen oxide reduction technique of an industrial burner that has been used in the prior art is a mixture-promoting type that promotes rapid mixing of fuel and air as in Patent Document 1, and a multi-pronged flame by controlling the shape of fuel and air nozzles as in Patent Document 2. Flame division type to form, multi-stage combustion type that operates under the condition of the theoretical mixing ratio through staged combustion as in Patent Document 3, exhaust gas exhausted after combustion, as in Patent Document 4, is recirculated from the outside or internally through flow control inside the combustion chamber It can be classified into recirculating exhaust gas recirculation type, etc. All of these technologies are technologies that suppress the generation of prompt NOx by reducing the formation of thermal NOx by minimizing the formation of local high-temperature flames or by minimizing the area where fuel is excessive.

However, the above techniques are difficult to apply when the heat load of the firebox is large and the volume is small, such as a perfusion boiler, since a long flame is formed in the injection direction.

Republic of Korea Patent Publication 10-2017-0073104 Republic of Korea Patent Registration 10-2003-0052891 Republic of Korea Registered Patent 10-1583509 Republic of Korea Registered Patent 10-0838163

The present invention is to solve the above problems, and an object of the present invention is to provide a low NO _x perfusion boiler for reducing the NOx emission concentration to a level of 10 ppm in a small perfusion boiler or a small combustion device.

In addition, by increasing the efficiency of energy use and using an additional device for the purpose of forming a high-temperature flame, combustion is performed inside the porous body, thereby causing heat recirculation by conduction and radiative heat transfer of the porous body itself, and ultimately, excess enthalpy An object of the present invention is to provide a perfusion boiler including a low NO _x combustion device capable of easily achieving high-temperature combustion, and a method for operating the same.

Cylindrical flow-through boiler according to the first embodiment of the present invention for achieving the above object, a housing of a cylindrical shape having a water supply port, steam outlet and combustion gas outlet; A cylindrical porous body combustor disposed inside the housing and including a first porous body having a hollow portion formed in the center and a second porous body surrounding the outside of the first porous body; A fuel oxidizer supply unit for supplying a premixer to the cylindrical porous body combustor; An upper header disposed inside the housing and connected to the water supply port; A lower header disposed inside the housing and connected to the steam outlet; And a plurality of water pipes which connect the upper header and the lower header, and are arranged in an annular shape spaced apart at regular intervals around the cylindrical porous combustor; It may include.

A flame surface may be formed between the first porous body and the second porous body.

The fuel oxidizer supply unit, a mixer provided on the cylindrical porous combustor; A fuel supply pipe provided on one surface of the mixer; An air supply pipe provided on one surface of the mixer; And a pre-mixer inlet pipe provided below the mixer. It may include.

The cylindrical porous body combustor may further include a porous distribution pipe formed inside the hollow portion of the first porous body.

The plurality of water pipes may be connected by a heat transfer plate to form a water pipe wall.

The water pipe wall may include an inner water pipe wall and an outer water pipe wall.

The inner water pipe wall may have a first opening formed in a portion, and the outer water pipe wall may have a second opening formed in a direction opposite to the first opening.

The inner water pipe wall and the outer water pipe wall may be connected to the same upper header and lower header.

The inner water pipe wall may be connected to the inner upper header and the inner lower header, and the outer water pipe wall may be connected to the outer upper header and the outer lower header.

A flat-type perfusion boiler according to a fourth embodiment of the present invention includes a polyhedral housing having a water supply port, a steam discharge port, and a combustion gas discharge port; A plate-shaped porous body combustor provided on one side of the housing and including a first porous body and a second porous body stacked in a flow direction of a premixer; A fuel oxidizer supply unit for supplying a premixer to the flat porous body combustor; An upper header disposed inside the housing and connected to the steam outlet; A lower header disposed inside the housing and connected to the water supply port; And a plurality of water pipes connecting the upper header and the lower header. It may include.

A flame surface may be formed between the first porous body and the second porous body.

The fuel oxidizer supply unit, a mixer provided at the front end of the plate-shaped porous combustor; A fuel supply pipe provided on one surface of the mixer; An air supply pipe provided on one surface of the mixer; And a premixer inlet pipe provided at the rear end of the mixer. It may include.

The housing may further include a first guide member and a second guide member for forming a flow path of combustion gas on the inner surface.

The plate-shaped porous body combustor may further include a porous distribution plate between the mixer and the first porous body.

As a method of operating the cylindrical perfusion boiler or flat-type perfusion boiler,

(A) mixing the fuel and the oxidizing agent in the mixer, supplying a mixed gas to the fuel inlet;

(b) performing excess enthalpy combustion by supplying fuel into the first porous body in step a;

(c) the boiler water inside the water pipe is heated by the excess enthalpy combustion to discharge steam;

It may include.

Step (a) and step (b) between the cylindrical or flat-type porous body combustor first igniter for ignition provided on the ignition first step (d) generating a flame in the second porous body located outside the combustion tube It may further include.

As described above, according to the present invention, by applying porous combustion in the combustor of the perfusion boiler, the high temperature region required for NO _x generation is narrowed due to the rapid temperature drop downstream of the flame, and also due to the rapidly increased combustion speed. The speed of the gas is increased, and as a result, the residence time in the high-temperature region rapidly decreases, and thus NO _x production can be suppressed because nitrogen does not provide sufficient time for oxidation.

In addition, a simple and effective heat recirculation effect can be obtained as compared to external heat recirculation through a conventional heat exchanger.

In addition, since uniform combustion occurs in the porous body and high-temperature heat radiation is radiated from the porous body, the water pipe of the boiler can be uniformly heated, which is advantageous for improving the performance and durability of the device.

1 is a perspective view of a cylindrical perfusion boiler according to a first embodiment of the present invention.
2 is a vertical cross-sectional view of a cylindrical porous combustor according to the present invention.
3 is a perspective view of a cylindrical perfusion boiler according to a second embodiment of the present invention.
4 is a horizontal cross-sectional view of a cylindrical perfusion boiler according to a second embodiment of the present invention.
5 is a perspective view of a water pipe wall according to a second embodiment of the present invention.
6 is a perspective view of a cylindrical perfusion boiler according to a third embodiment of the present invention.
7 is a horizontal cross-sectional view of a cylindrical perfusion boiler according to a third embodiment of the present invention.
8 is a perspective view of a plate-type perfusion boiler according to a fourth embodiment of the present invention.
9 is a vertical cross-sectional view of a plate-type perfusion boiler according to a fourth embodiment of the present invention.

Hereinafter, exemplary embodiments in which a person having ordinary skill in the art to which the present invention pertains may easily implement the present invention will be described in detail with reference to the accompanying drawings. However, in the detailed description of the operation principle of the preferred embodiment of the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

The present invention will be described as detailed examples according to the drawings.

1 is a perspective view of a cylindrical perfusion boiler 100 according to a first embodiment of the present invention, and FIG. 2 is a vertical sectional view of the cylindrical porous body combustor 120.

Referring to FIG. 1, the cylindrical perfusion boiler 100 according to the first embodiment of the present invention includes a cylindrical housing 110 having a water supply port 111, a steam discharge port 112, and a combustion gas discharge port 113, A cylindrical porous combustor 120 provided inside the housing 110, an upper header 140, a lower header 150, a plurality of water pipes 161 and a fuel oxidant supply unit 130 may be included.

The fuel oxidant supply unit 130 may include a mixer 131, a fuel supply pipe 132, an air supply pipe 133, and a premixer inlet pipe 134. The mixer 131 is disposed above the cylindrical porous combustor 120. A fuel supply pipe 132 and an air supply pipe 133 may be provided in a part of the mixer 131, and a pre-mixer inlet pipe 134 may be formed under the mixer 131.

Accordingly, air and fuel may be introduced into the mixer 131 and premixed, respectively, and introduced into the cylindrical porous combustor 120 through the premixer inlet pipe 134. At this time, the air supplied to the air supply pipe 133 may be an oxidizing agent.

As shown in FIG. 2, the cylindrical porous body combustor 120 has a cylindrical first porous body 121 having a hollow portion 124 formed in the center, and a second porous body 122 surrounding the outside of the first porous body 121. ).

A flame surface 123 may be formed between the first porous body 121 and the second porous body 122.

A porous distribution pipe 125 may be provided inside the hollow portion 124 of the first porous body 121. Accordingly, the fuel and air introduced into the cylindrical porous body combustor 120 uniformly pass through the first porous body 121, and continuously pass through the second porous body 122, thereby enabling more stable combustion. .

When there is no heat loss to the outside, the maximum temperature that can be reached by burning fuel and oxidant under a given condition is called aadiabatic flame temperature, where heat from hot combustion gas to cold unburned gas If recirculation is given, a high temperature above the single flame temperature can be achieved and this is called excess enthalpy combustion.

As in the present invention, instead of using an additional device such as a heat exchanger for heat recirculation, when the combustion is performed inside the porous body using the cylindrical porous body combustor 120, thermal recirculation is caused by conduction and radiation heat transfer of the porous body itself. And ultimately can easily achieve excess enthalpy combustion.

A plurality of water pipes 161 are arranged around the outer periphery of the cylindrical porous body combustor 120 at regular intervals and arranged in an annular shape. The water pipe 161 is a passage through which the boiler water moves, and may have a long pipe shape. The upper part of the water pipe 161 is connected to the upper header 140, and the lower part of the water pipe 161 is connected to the lower header 150.

The upper header 140 and the lower header 150 have a ring shape having a diameter larger than the diameter of the cylindrical porous body combustor 120, and an internal space may be formed.

The lower header 150 is connected to the water supply port 111 and uniformly supplies the boiler water supplied from the water supply port 111 to a plurality of water pipes 161.

Boiler water supplied from the lower header 150 moves from the lower portion of each water pipe 161 to the upper portion, is heated by the combustion heat of the cylindrical porous body combustor 120, and is collected in the upper header 140 in a saturated vapor state, and then the upper header ( 140) is discharged through a steam outlet 112 connected to.

The combustion gas discharged from the cylindrical porous body combustor 120 moves between the plurality of water pipes 161 and is discharged to the combustion gas discharge port 113.

3 is a perspective view of a cylindrical flow-through boiler 100 according to a second embodiment of the present invention, Figure 4 is a horizontal cross-sectional view of the cylindrical flow-through boiler 100 according to a second embodiment of the present invention, Figure 5 is the present invention It is a perspective view of the water pipe wall 160 according to an embodiment of the.

3 to 4, the cylindrical perfusion boiler 100 according to the second embodiment of the present invention has a cylindrical housing (with a water supply port 111, a steam discharge port 112, and a combustion gas discharge port 113) 110), a cylindrical porous combustor 120 provided inside the housing 110, an upper header 140, a lower header 150, a water pipe wall 160 and a fuel oxidant supply unit 130 may be included.

Hereinafter, the same reference numerals are assigned to the same components as those in the first embodiment of the present invention, and detailed descriptions thereof are omitted.

A water pipe wall 160 may be formed around the outer periphery of the cylindrical porous body combustor 120. The water pipe wall 160 may have a structure in which a plurality of water pipes 161 are connected by a heat transfer plate 162.

Referring to FIG. 5, the water pipe wall 160 is fixed in a state in which the water pipes 161 are spaced apart at predetermined intervals as both ends of the heat transfer plate 162 are respectively connected to the water pipes 161.

The heat transfer plate 132 may be made of a thermally conductive material, and thus promote heat transfer.

At least one water pipe wall 160 may be provided. In the present invention, a boiler having two water pipe walls 160 will be described as an example.

The water pipe wall 160 may be formed of an inner water pipe wall 164 and an outer water pipe wall 165.

The outer water pipe wall 165 may have the same structure as the inner water pipe wall 164.

In addition, a first opening 166 may be formed in a portion of the inner water pipe wall 164, and a second opening 167 may be formed in the outer water pipe wall 165.

The second opening 167 may be formed in a direction opposite to the first opening 166.

The first opening 166 and the second opening 167 may be a movement passage of combustion gas. That is, the combustion gas discharged from the cylindrical porous body combustor 120 moves to the second opening 167 through the first opening 166 and is discharged to the combustion gas outlet 113.

The upper header 140 connected to the water supply port 111 is disposed at the upper portion of the inner water pipe wall 164 and the outer water pipe wall 165, and the lower header 150 connected to the steam discharge port 112 is disposed at the bottom. Can be connected.

As in the first embodiment, the upper header 140 and the lower header 150 have a ring shape having a diameter larger than the diameter of the cylindrical porous body combustor 120, and the inner water pipe wall 164 and the outer water pipe wall 165 are one. It may be connected to the upper header 140 and one lower header 150.

With the above structure, the boiler water is supplied to the water pipes of the inner water pipe wall 164 and the outer water pipe wall 165 from the lower header 150 collectively, and the inner water pipe wall 164 and the outer water pipe wall 165 ) The saturated steam generated in the water pipe 161 is discharged through the upper header 140.

6 is a perspective view of a cylindrical perfusion boiler 100 according to a third embodiment of the present invention, and FIG. 7 is a horizontal cross-sectional view of the cylindrical perfusion boiler 100 according to a third embodiment of the present invention.

6 and 7, the cylindrical perfusion boiler 100 according to the second embodiment of the present invention includes a cylindrical housing (with a water inlet 111, a steam outlet 112, and a combustion gas outlet 113) 110), a cylindrical porous combustor 120 provided inside the housing 110, an upper header 140, a lower header 150, a water pipe wall 160 and a fuel oxidant supply unit 130 may be included.

Hereinafter, the same reference numerals are assigned to the same components as those in the first embodiment of the present invention, and detailed descriptions thereof are omitted.

A water pipe wall 160 may be formed around the outer periphery of the cylindrical porous body combustor 120. The water pipe wall 160 may be formed of an inner water pipe wall 164 and an outer water pipe wall 165.

A first opening 134 may be formed on a portion of the inner water pipe wall 130, and a second opening 135 may be formed on the outer water pipe wall 130 in a direction opposite to the first opening 134.

The inner water pipe wall 164 and the outer water pipe wall 165 may be connected to the independent upper header 140 and the lower header 150, respectively. That is, the inner water pipe wall 164 is connected to the inner upper header 141 and the inner lower header 151, and the outer water pipe wall 165 is connected to the outer upper header 142 and the outer lower header 152. .

Therefore, the boiler water supplied from the inner lower header 151 flows into the inner water pipe wall 164 and is discharged through the inner upper header 141, and the boiler water supplied from the outer lower header 152 is the outer water pipe wall ( 165) and is discharged through the inner upper header 141.

8 is a perspective view of a flat-type flow-through boiler 200 according to a fourth embodiment of the present invention, and FIG. 9 is a vertical cross-sectional view of the flat-type flow-through boiler 200 according to a fourth embodiment of the present invention.

8 and 9, the flat-type perfusion boiler 200 includes a polyhedron-shaped housing 210 and a housing 210 in which a water supply port 211, a steam discharge port 212, and a combustion gas discharge port 213 are formed. It includes a flat plate porous combustor 220, an upper header 240, a lower header 250, a plurality of water pipes 261 and a fuel oxidant supply unit 230 provided on one side of the upper portion.

The flat porous body combustor 220 includes a first porous body 221 and a second porous body 222 stacked in a flow direction of a pre-mixer, and a flame surface between the first porous body 221 and the second porous body 222. (223) is formed.

A porous distribution plate 225 may be provided between the fuel oxidant supply unit 230 and the first porous body 221. Through the above configuration, the fuel introduced into the flat porous combustor 220 uniformly passes through the porous body 221, and continuously passes through the second porous body 222, thereby enabling more stable combustion.

The fuel oxidizing agent supply unit 230 may include a mixer 231, a fuel supply pipe 232, an air supply pipe 233, and a premixer inlet pipe 234.

Air and fuel supplied through the fuel supply pipe 232 and the air supply pipe 233 may be introduced into the mixer 230 and pre-mixed, respectively, and through the pre-mixer inlet pipe 233, inside the flat porous combustor 220 Flows into At this time, the air supplied to the air supply pipe 233 may be an oxidizing agent.

The housing further includes a first guide member 270 and a second guide member 280 for forming a flow path of combustion gas therein.

The premixer can be a fuel and/or an oxidizing agent.

The fuel may be a hydrocarbon compound, and may have 1 to 6 carbon atoms of the hydrocarbon compound. The fuel may be synthetic gas, by-product gas, hydrogen, LNG, LPG.

The oxidizing agent is not limited as long as it is a gaseous substance containing oxygen. Preferably it can be air.

Specifically, when defining the side on which the planar porous combustor is disposed as the A surface and the side facing the A as the B surface, the first guide member 270 may extend horizontally from the A surface toward the B surface. At this time, the first guide member 270 may be spaced apart from the B surface.

The second guide member 280 may extend horizontally from the B surface toward the A surface. At this time, the second guide member 280 is disposed under the first guide member 270, and may be spaced apart from the A surface by a predetermined distance.

The first guide member 260 and the second guide member 270 have a plate shape, and are positioned between the upper header 240 and the lower header 250 to penetrate a plurality of water pipes 261.

By the above structure, a first space 291 is formed between the upper surface of the housing 210 and the first guide member 270, and between the first guide member 270 and the second guide member 280. A second space 292 is formed, and a third space 293 is formed between the second guide member 280 and the bottom surface of the housing.

In the flat-type perfusion boiler according to the third embodiment of the present invention, the combustion gas by the plate-shaped porous combustor 220 sequentially forms the first space 291, the second space 292, and the third space 293. As it passes, the water pipe 261 is heated and discharged through the combustion gas outlet 213.

Boiler water flowing into the lower header 250 passes through a plurality of water pipes 261 and is heated and discharged to the steam outlet 212 through the upper header 240 in a saturated vapor state.

Although described above with reference to the drawings according to embodiments of the present invention, those skilled in the art to which the present invention pertains will be able to perform various applications and modifications within the scope of the present invention based on the contents.

100: cylindrical perfusion boiler
200: flat-type perfusion boiler
110, 210: housing
111, 211: water inlet
112, 212: Steam outlet
113, 213: combustion gas outlet
120: cylindrical porous combustor
220: flat type porous combustor
121, 221: first porous body
122, 222: second porous body
123, 223: Flame side
124: hollow
125: porous distribution pipe
225: porous distribution plate
130, 230: fuel oxidizer supply unit
131, 231: mixer
132, 232: fuel supply pipe
133, 233: air supply pipe
134, 234: premixer inlet pipe
140, 240: upper header
150, 250: lower header
141: inner upper header
142: outer upper header
151: inner lower header
152: outer lower header
160: water pipe wall
161, 261: water pipe
162, 262: heat transfer plate
164: inner water pipe wall
165: outer water pipe wall
166: first opening
167: second opening
270: first guide member
280: second guide member
291: first space
292: Second space
293: space 3

Claims (14)

A cylindrical housing having a water supply port, a steam discharge port, and a combustion gas discharge port;
A cylindrical porous body combustor disposed inside the housing and including a first porous body having a hollow portion formed in the center and a second porous body surrounding the outside of the first porous body;
A fuel oxidizer supply unit for supplying a premixer to the cylindrical porous body combustor;
An upper header disposed inside the housing and connected to the water supply port;
A lower header disposed inside the housing and connected to the steam outlet; And
A plurality of water pipes connecting the upper header and the lower header, and arranged in an annular shape spaced apart at regular intervals around the cylindrical porous combustor;
It includes,
Cylindrical perfusion boiler having a flame surface between the first porous body and the second porous body. According to claim 1,
The fuel oxidizer supply unit,
A mixer provided on the cylindrical porous combustor;
A fuel supply pipe provided on one surface of the mixer;
An air supply pipe provided on one surface of the mixer; And
A premixer inlet pipe provided below the mixer;
Cylindrical perfusion boiler with wool. According to claim 1,
The cylindrical porous body combustor further includes a porous distribution pipe formed inside the hollow portion of the first porous body. According to claim 1,
The plurality of water pipes are connected by a heat transfer plate to form a cylindrical flow-through boiler. According to claim 4,
The water pipe wall is a cylindrical flow-through boiler consisting of an inner water pipe wall and an outer water pipe wall. The method of claim 5,
A first opening is formed in a portion of the inner water pipe wall,
The outer water pipe wall is a cylindrical flow-through boiler in which a second opening is formed in a direction opposite to the first opening. According to claim 4,
The inner water pipe wall and the outer water pipe wall are cylindrical flow-through boilers connected to the same upper and lower headers. According to claim 3,
The inner water pipe wall is connected to the inner upper header and the inner lower header,
The outer water pipe wall is a cylindrical perfusion boiler connected to the outer upper header and the outer lower header. Polyhedral housing with a water inlet, a steam outlet and a combustion gas outlet;
A plate-shaped porous body combustor provided on one side of the housing and including a first porous body and a second porous body stacked in a flow direction of a premixer;
A fuel oxidizer supply unit for supplying a premixer to the flat porous body combustor;
An upper header disposed inside the housing and connected to the steam outlet;
A lower header disposed inside the housing and connected to the water supply port; And
A plurality of water pipes connecting the upper header and the lower header;
It includes,
A plate-type perfusion boiler having a plate-shaped porous body combustor having a flame surface formed between the first porous body and the second porous body. The method of claim 9,
The fuel oxidizer supply unit,
A mixer provided at the front end of the flat plate porous combustor;
A fuel supply pipe provided on one surface of the mixer;
An air supply pipe provided on one surface of the mixer; And
A premixer inlet pipe provided at the rear end of the mixer;
Flat type perfusion boiler comprising a. The method of claim 10,
The housing is a flat-type perfusion boiler having a flat porous body combustor further comprising a first guide member and a second guide member for forming a flow path of combustion gas on an inner surface. The method of claim 10,
The plate-type porous body combustor is a plate-type perfusion boiler having a porous body combustor further comprising a porous distribution plate between the mixer and the first porous body. A method for operating the cylindrical perfusion boiler or the flat-type perfusion boiler according to any one of claims 1 to 11,
(A) mixing the fuel and the oxidizing agent in the mixer, supplying a mixed gas to the fuel inlet;
(b) performing excess enthalpy combustion by supplying fuel into the first porous body in step a;
(c) the boiler water inside the water pipe is heated by the excess enthalpy combustion to discharge steam;
Method of operating a cylindrical perfusion boiler or a flat-type perfusion boiler comprising a. The method of claim 13,
Step (a) and step (b) between the cylindrical or planar porous body combustor first igniter provided for ignition is first ignited to generate a flame in the second porous body located outside the combustion pipe (d) A method of driving a cylindrical perfusion boiler or a flat-type perfusion boiler further comprising.

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