JPH09243005A - Tower boiler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tower boiler in which a divided wall is mounted without producing any stress at a loop tube and the divided wall and then its controlling characteristic and safety characteristic can be increased. SOLUTION: Upper positions of furnace walls 3, 4 of a main body 7 of a boiler are provided with a pipe 35 passing through the furnace walls 3, 4, the pipe 35 is extended inside and upwardly of the main body 7 of the boiler to form a slant part 34, thereafter pipes 35 at the raised part raised vertically and upwardly are connected to each other by fins to constitute divided walls 36, 37 and to form a plurality of gas passages 39, 40 and 41. Further, each of the reheater 42 and super-heaters 43, 44 is arranged at separate gas passages 39, 40 and 41. Each of the gas passages 39, 40 and 41 is provided with gas flow rate adjusting dampers 45, 46 and 47. The upper end of the pipe 35 is connected to a header 24 of a hanger tube 25 and the lower end of the pipe 35 is connected to steam outlet of a gas-water separating device.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a tower boiler.

[0002]

2. Description of the Related Art FIGS. 7 and 8 show an example of a conventional tower boiler. The tower boiler includes front and rear furnace walls 1, 2.
2 and the furnace walls 3 and 4 on the left and right sides have a rectangular horizontal cross-sectional shape and extend upwardly, and a boiler body 7 having a ceiling wall 6 at the upper end is provided. It is suspended and supported by the suspension member 5. The front and rear furnace walls 1, 2 and the left and right furnace walls 3, 4 have a structure in which parallel furnace wall pipes 9 extending in the vertical direction are connected by fins 10 as shown in FIG. .

A plurality of burners 11 are provided at the lower positions of the furnace walls 1 and 2 on the front and rear sides of the boiler body 7, and an exhaust gas outlet 12 is provided at the rear of the upper end of the boiler body 7. Flue 13 with upper end communicating with exhaust gas outlet 12
Extends downward.

A heat exchanging device 14 is installed between the upper and lower intermediate portions of the boiler body 7 and the exhaust gas outlet 12, and the heat exchanging device 14 is disposed above and below the upper and lower intermediate portions of the boiler body 7. A casing 15 is provided so as to surround the outside of the furnace walls 1 and 2 and the ceiling wall 6, and a heat insulating material 16 is provided on the outer periphery of the casing 15 and the lower outer periphery of the boiler body 7.

The heat exchange device 14 includes the exhaust gas outlet 1
A economizer 17 is provided at the uppermost position (on the low temperature side) near 2, and a low temperature side reheater 18 is provided below the economizer 17.
Low temperature side superheater 19, high temperature side reheater 20, high temperature side superheater 2
1, and the hanger tube superheater 22 are sequentially arranged.

Each of the economizer 17, the low temperature side reheater 18, the low temperature side superheater 19, the high temperature side reheater 20, and the high temperature side superheater 21 is located inside the boiler main body 7 as shown in FIG. A vertical panel loop pipe 23 extending in the front-rear direction over the entire width is formed, and a large number of panel loop pipes 23 are arranged side by side in the left-right direction in FIG.

Further, the hanger tube superheater 22 is
The economizer 17, the low temperature side reheater 18, the low temperature side superheater 19, the high temperature side reheater 20, and the high temperature side superheater 21 are provided by a number of hanger tubes 25 extending downward from a header 24 provided at the upper end. The respective loop tubes 23 are suspended and supported, and the hanger tube superheater 22 is configured by bending the lower end thereof in the lateral direction.

Each furnace wall 1, 2, 3, 4 of the boiler body 7
The upper end of the furnace wall tube 9 is a steam / water separator 28 composed of a drum or a separator (FIG. 7 shows the case of a drum).
The heating water heated by the furnace wall tube 9 is separated into water and steam, and the water is returned to the furnace wall tube 9 of the boiler body 7 again and separated by the steam / water separator 28. Is
It is adapted to be guided to the header 24 of the hanger tube 25.

Therefore, in the example of the configuration shown in FIGS. 7 and 8, the feed water 26 introduced from the lower side is first supplied to the economizer 17, and the hot exhaust gas 27 generated by the combustion of the burner 11 causes the economizer 17 to operate. After the water supply 26 is heated, it is supplied to the lower end of the boiler body 7 and rises while being heated in the furnace wall pipes 9 of the front and rear furnace walls 1 and 2 and the left and right furnace walls 3 and 4 of the boiler body 7. Then, it is supplied to the steam-water separator 28 in the upper part and separated into water and steam, and the water is returned to the furnace wall tube 9 of the boiler body 7 again.

The steam separated by the steam separator 28 is supplied from the header 24 to the hanger tube 25, descends inside, is guided to the hanger tube superheater 22 to be superheated, and then the low temperature side superheater 19 Is then supplied to the high temperature side superheater 21 to be superheated to become high temperature and high pressure steam, and is supplied to the high pressure steam turbine 29.

The steam emitted from the high-pressure steam turbine 29 is
After being supplied to the low temperature side reheater 18 to be reheated, it is guided to the high temperature side reheater 20 to be further superheated, and then supplied to the steam turbine 30 of medium pressure or low pressure.

[0012]

However, in the conventional tower boiler shown in FIGS. 7 and 8, the economizer 1 is used.
7, the low-temperature side reheater 18, the low-temperature side superheater 19, the high-temperature side reheater 20, and the high-temperature side superheater 21 are each a single-pass type provided over the entire front and rear width in the boiler body 7. Therefore, the heat absorption balance between the superheaters 19 and 21 and the reheaters 18 and 20 is arbitrarily adjusted, or the boiler main body 7
There was a problem that the controllability was low because it was not possible to adjust the heat collection balance between the left and right or the front and back.

In order to deal with this problem, a dividing wall 31 as shown by a broken line in FIG. 7 is installed in the boiler body 7 to form a gas passage divided into left and right, and further, the left and right gas passages. Gas flow rate adjustment dampers 32, 3 on top of each of
It is possible to use a parallel path system in which 3 is installed, but since the economizer 17, the reheaters 18 and 20, and the superheaters 19 and 21 are suspended by the hanger tubes 25, respectively, When the flow rate of the exhaust gas 27 in the left and right gas passages is changed by the flow rate adjusting dampers 32 and 33, the left and right heat collection amounts change, so that a difference in extension of the hanger tube 25 occurs between the left and right. Since the loop pipes 23 of the reheaters 18, 20 and the superheaters 19, 21 penetrate the partition wall 31, there occurs a problem that excessive stress is generated in the loop pipe 23, and the partition wall 3
When 1 is provided so as to penetrate through the front furnace wall 1, there is a problem that a difference in extension occurs due to a temperature difference between the front furnace wall 1 and the partition wall 31 and stress is generated in a penetrating portion of the partition wall 31.

The steam outlet 28a of the steam separator 28
The steam of is a wet steam, and since the wet steam is conventionally supplied to the header 24 of the hanger tube 25, it is considered that a part of the hanger tube 25 is blocked by the drain. When the hanger tube 25 is closed as described above, the empty portion beyond that is exposed to a high temperature to cause a large extension, and the extension of the hanger tube 25 varies, whereby the loop tube 23 and the hanger tube 25 are varied. 25 causes a problem that stress is generated. Further, when the air / water separator 28 becomes full and water overflows, the water will flow into the hanger tube 25, which may further increase the problem due to the difference in extension.

Further, if the fluid introduced to the dividing wall 31 is not taken into consideration, there arises a problem that stress is generated in a welded portion between the furnace wall 2 and the pipe penetrating the furnace wall 2.

The present invention has been made in view of the above situation, and it is possible to enhance the controllability and safety by installing the dividing wall without causing stress on the loop tube and the dividing wall. It is intended to provide a tower boiler.

[0017]

According to a first aspect of the present invention, a pipe penetrating the furnace wall is provided at an upper position of the furnace wall of the boiler body in which an upper end of the furnace wall tube is connected to the steam separator. After the pipe is extended to the inside of the boiler main body to form an inclined portion, the pipe is erected vertically upward to connect the pipes of the rising portion with fins to form a dividing wall to form a plurality of gas passages. Forming a reheater and a superheater respectively in separate gas passages, and arranging a gas flow rate adjusting damper in each of the gas passages,
A tower boiler, wherein an upper end of a pipe forming the dividing wall is connected to a header of a hanger tube, and a lower end of the pipe forming the dividing wall is connected to a steam outlet of a steam separator. , Are related to.

The invention according to claim 2 is characterized in that a plurality of gas passages are formed in the left and right direction in the boiler main body by forming a dividing wall by a pipe penetrating the left and right furnace walls. The invention according to claim 3 is characterized in that a plurality of gas passages are formed in the front-rear direction in the boiler main body by forming the dividing wall by a pipe penetrating the front and rear furnace walls.

According to the first aspect of the present invention, a pipe penetrating the furnace wall is provided at an upper position of the furnace wall of the boiler main body, and the pipe is extended upward inward of the boiler main body to form an inclined portion, and then vertically upward. To form a plurality of gas passages by connecting the tubes of the rising portion with fins to form a dividing wall,
Since the reheater and the superheater are arranged in separate gas passages, and the gas flow rate adjusting damper is arranged in each of the gas passages, the gas flow rate adjusting damper is adjusted to adjust the reheater and the superheater. The amount of heat can be changed, and the controllability of the tower boiler can be greatly improved.

Since the upper end of the tube forming the dividing wall is connected to the header of the hanger tube and the lower end of the tube is connected to the steam outlet of the steam separator, the dividing wall is separated from the furnace wall. Since the difference in temperature between the partition wall and the extension difference is hardly generated, it is possible to prevent the problem that stress is generated especially in the furnace wall pipe passage part of the dividing wall, and further prevent the problem that the drain flows into the hanger tube. You can

According to the second aspect of the present invention, the gas passage divided into a plurality of parts in the left-right direction can be formed by constructing the dividing wall by the pipe penetrating the left and right furnace walls.

According to the third aspect of the present invention, the gas passage divided into a plurality of parts in the front-rear direction can be formed by forming the partition wall with the pipes that penetrate the front and rear furnace walls.

[0023]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 3 show an example of an embodiment of the present invention applied to the conventional tower boiler shown in FIGS. 7 and 8. The same reference numerals in the drawings denote the same. Is represented.

In FIGS. 1 to 3, as shown in FIG. 4 in which the IV portion of FIG. 1 is enlarged, in the upper position of the boiler body 7, the furnace wall tubes 9 of the left and right furnace walls 3, 4 are connected to each other. A large number of pipes 35, which are fixed by welding through the fins 10 inward and outward, are provided in the front-rear direction, the pipes 35 are extended upward inward of the boiler body 7 to form inclined portions 34, and further the inner end portions of the inclined portions 34 are formed. By vertically rising to the outside of the ceiling wall 6, the upper ends of the pipes 35 are connected to a collective header 35b, and the pipes 35 between the inclined portion 34 and the exhaust gas outlet 12 are connected by fins 38. By configuring the two dividing walls 36 and 37, the gas passage 39 in the central portion and the gas passages 40 and 41 on the left and right sides are formed. As a result, the exhaust gas 27 from the burner 11 is guided to the central gas passage 39 and, at the same time, is guided to the left and right gas passages 40 and 41 through the slanted portion 34 which is in the form of a loose pipe. .

The lower end of each of the tubes 35 has a boiler body 7
It is connected to the lower header 35a provided outside,
A steam outlet 28a of the steam separator 28 is connected to guide steam to the lower header 35a.

Further, the collective header 35b is connected to the header 24 of the hanger tube 25.

A low temperature side reheater 42 is provided in the central gas passage 39.
And the low temperature side superheaters 43 and 44 are installed in the left and right gas passages 40 and 41, respectively.

Further, the economizer 17 is arranged above the low temperature side reheater 42 and the low temperature side superheaters 43 and 44 in the central gas passage 39 and the left and right gas passages 40 and 41, and the central economizer 17 is provided. At the upper ends of the gas passages 39 and the gas passages 40 and 41 on the left and right sides,
46 and 47 are arranged.

At this time, the dividing walls 36 and 37 divide the upper portion of the inside of the boiler body 7 into three portions in the front and rear, and the economizer 1
7. The loop tubes 23 of the low temperature side reheater 42 and the low temperature side superheaters 43, 44 are arranged to extend in the front-rear direction along the divided central gas passage 39 and the left and right gas passages 40, 41. Therefore, the loop tube 23 does not penetrate the partition walls 36 and 37.

A high temperature side reheater 20 and a high temperature side superheater 21 similar to the conventional one are arranged below the dividing walls 36 and 37, and the economizer 17 and the low temperature side reheater 42 are arranged. The low temperature side superheaters 43 and 44, the high temperature side reheater 20, and the high temperature side superheater 21 are suspended by a plurality of hanger tubes 25 connected to a header 24 provided at the upper part.

1 to 3, the low temperature side reheater 42 is installed in the central gas passage 39 and the low temperature side superheaters 43 and 44 are provided in the left and right gas passages 40 and 41. The case of installation is shown as an example.
Two low-temperature superheaters are installed, and gas passages 40, 4 on the left and right sides are installed.
It is also possible to install a low temperature side reheater divided into two in one, and in the gas passages 39, 40, 41, part of the reheaters 42, 20 and the superheaters 43, 44, 21. They may be installed or all of them may be installed.

According to the structure shown in FIGS. 1 to 3, the feed water 26 introduced from below is first supplied to the economizer 17.
After the feed water 26 is heated in the economizer 17 by the high temperature exhaust gas 27 generated by the combustion of the burner 11, it is supplied to the lower end of the boiler body 7 and the front and rear furnace walls 1, 2 and the left and right sides of the boiler body 7 are supplied. The furnace wall pipes 9 of the furnace walls 3 and 4 rise while being heated, and are supplied to the steam-water separator 28 in the upper part to be separated into water and steam, and the water is returned to the furnace wall pipe 9 of the boiler body 7 again. Be done.

The steam separated by the steam separator 28 is supplied to the lower header 35a from the steam outlet 28a and is supplied to the pipe 35.
After flowing into the inside and ascending the inclined portion 34 and the dividing walls 36 and 37, they are collected in the collecting header 35b, and subsequently the header 24.
Is guided to and descends in the hanger tube 25.

The steam descending in the hanger tube 25 is guided to the hanger tube superheater 22 and superheated, and then supplied to the low temperature side superheater 43, and then to the high temperature side superheater 21 to be superheated. The high-temperature and high-pressure steam is supplied to the high-pressure steam turbine 29.

The steam from the high pressure steam turbine 29 is
After being supplied to the low temperature side reheater 42 to be reheated, the low temperature side reheater 42 is guided to the high temperature side reheater 20 to be further superheated, and then supplied to the intermediate pressure or low pressure steam turbine 30.

In the above description, the two dividing walls 36 and 37 are formed by the pipes 35 penetrating the left and right furnace walls 3 and 4, and the central gas passage 39 and the left and right gas passages 40,
41, the low temperature side reheater 42 which is a part of the reheater is arranged in the gas passage 39 in the central portion, and the low temperature reheater which is a part of the superheater is provided in each of the left and right gas passages 40 and 41. Side superheater 4
3, 44 are installed, and gas flow rate adjusting dampers 45, 46, 47 are installed in the central gas passage 39 and the left and right gas passages 40, 41 to provide a low temperature side reheater 42 and a low temperature side overheat. Since the flow rate of the exhaust gas 27 guided to the reactors 43 and 44 can be adjusted, the heat collection amounts of the reheater and the superheater can be changed, and thus the controllability of the tower boiler can be significantly improved.

The steam outlet 28a of the steam separator 28
Of the steam of the dividing wall 36, 37 through the lower header 35a.
The temperature difference between the furnace walls 3 and 4 on the left and right sides and the partition walls 36 and 37 can be reduced because the pipes 35 are connected to each other. , 37, in particular, the problem that stress is generated in the penetration portions of the furnace walls 3, 4 can be prevented.

Further, the dividing walls 36 and 37 divide the upper part of the boiler main body 7 into three parts in the front and rear, and the low temperature side reheater 42,
Loop pipe 23 of low temperature side superheaters 43 and 44 and economizer 17
Is the central gas passage 39 and the left and right gas passages 40,
Since the loop pipe 23 is arranged so as to extend in the front-rear direction along 41, the loop pipe 23 does not penetrate the dividing walls 36, 37, and therefore the central gas passage 39 and the left and right gas passages 40, 41 are provided.
Even if a difference in extension occurs due to a change in the flow rate of the exhaust gas 27 flowing to the hanger tube 25 and a difference in heat collection of the hanger tube 25, stress is not generated in the loop tube 23.

Further, the steam outlet 28a of the steam separator 28
Of the steam of the dividing wall 36, 37 through the lower header 35a.
The steam of the pipe 35 is supplied to the header 24 of the hanger tube 25 via the collecting header 35b.
The moist steam supplied to the pipe 35 from the
Since the dried steam is supplied to the header 24 while flowing through the hose, the drain is prevented from entering the hanger tube 25 and the extension amount of the hanger tube 25 is made uniform. It is possible to prevent the problem that stress is generated in the loop pipe 23 due to an increase in a part of the extension, and also when the water in the steam separator 28 overflows.
Hanger tube 2 only by entering partition walls 36 and 37
It is possible to improve the safety of the device by preventing water from entering 5.

FIG. 5 and FIG. 6 show another example of the embodiment of the present invention.
A pipe 35 is provided so as to penetrate through the rear furnace wall 2, and the pipe 35 is guided to the upper inside of the boiler main body 7 to form an inclined portion 34.
The pipe 35 between the inclined portion 34 and the exhaust gas outlet 12 is connected to the collecting header 35b by rising vertically upward and connecting the upper end to the collecting header 35b.
By connecting the fins 38 to each other to form the dividing wall 48, the front gas passage 49 and the rear gas passage 5 can be formed.
Form 0.

A low temperature side reheater 51 is arranged in the front gas passage 49, and a low temperature side superheater 52 is installed in the rear gas passage 50. Further, the partition wall 48 is penetrated above the low temperature side reheater 51 and the low temperature side superheater 52 to install the economizer 17, and the gas flow rate is adjusted at the upper ends of the front gas passage 49 and the rear gas passage 50. The dampers 53 and 54 are installed.

At this time, the low temperature side reheater 51 and the low temperature side superheater 52 are constituted by a loop pipe which is short in the front-rear direction so as not to penetrate the partition wall 48. The other configurations are the same as those shown in FIGS. 1 to 3.

5 and 6, the low temperature side reheater 51 is installed in the front gas passage 49 and the low temperature side superheater 52 is installed in the rear gas passage 50. However, it is also possible to install the reheaters 51 and 20 and the superheaters 52 and 21 installed in the gas passages 49 and 50 partially or entirely, respectively. May be.

According to the configurations shown in FIGS. 5 and 6, the dividing wall 48 is constituted by the pipe 35 penetrating the rear furnace wall 2 to form the front gas passage 49 and the rear gas passage 50. Thus, the low temperature side reheater 51 which is a part of the reheater is arranged in the front gas passage 49, and the low temperature side superheater 52 which is a part of the superheater is installed in the rear gas passage 50. And then
Further, gas flow rate adjusting dampers 53 and 54 are installed in the front gas passage 49 and the rear gas passage 50 so that the flow rate of the exhaust gas 27 guided to the low temperature side reheater 51 and the low temperature side superheater 52 can be adjusted. The heat collection amounts of the reheater and the superheater can be changed, so that the controllability of the tower boiler can be significantly improved.

Further, since the temperature difference between the furnace wall 2 on the rear side and the partition wall 48 is small and there is almost no difference in expansion, it is possible to prevent the problem that stress is generated particularly in the part of the partition wall 48 penetrating the furnace wall 2. Further, since the loop pipes 23 of the low temperature side reheater 51 and the low temperature side superheater 52 form short loops in the front and rear so as not to penetrate the dividing wall 48, the front and rear gas passages 49, 50 are formed. Even if the flow rate of the flowing exhaust gas 27 changes and a difference in the heat collection of the hanger tube 25 causes a difference in extension, no stress is generated in the loop tube 23. At this time, the loop pipe 23 of the economizer 17 penetrates the dividing wall 48, but the dividing wall 48 is on the low temperature side close to the fulcrum side of suspension, and the furnace wall 2 and the dividing wall 48 on the rear side. Since the difference in temperature is small and the difference in elongation is small, no large stress is generated in the loop pipe 23 of the economizer 17. However, when the stress of the loop pipe 23 of the economizer 17 becomes a problem, the economizer 17
Similarly to the low temperature side reheater 51 and the low temperature side superheater 52, it can be divided into front and rear to form a short loop tube.

In the case of the embodiment shown in FIGS. 5 and 6, as in the case of FIGS. 1 to 3, it is possible to prevent the occurrence of problems caused by the drain flowing into the hanger tube 25.

It should be noted that the present invention is not limited to the above-mentioned embodiment, and in the embodiment of FIG. 1, one partition wall is provided as in the embodiment of FIG. Alternatively, in the embodiment of FIG. 5, two partition walls may be provided in the same manner as in the embodiment of FIG. 1 so that the wall is divided into three parts, and the direction of division and the number of divisions are arbitrarily changed. Of course, it can be done.

[0049]

According to the invention of claim 1, a pipe penetrating the furnace wall is provided at an upper position of the furnace wall of the boiler main body, and the pipe is extended upward inside the boiler main body to form an inclined portion. After that, a plurality of gas passages are formed by vertically rising the pipes and connecting the pipes of the rising portion with fins to form a dividing wall, and the reheater and the superheater are provided in separate gas passages, respectively. Since the gas flow rate adjustment dampers are arranged in each of the gas passages, the heat collection amounts of the reheater and the superheater can be changed by adjusting the gas flow rate adjustment dampers. Can be greatly improved.

Since the upper end of the tube forming the dividing wall is connected to the header of the hanger tube and the lower end of the tube is connected to the steam outlet of the steam separator, the dividing wall is separated from the furnace wall. Since the difference in temperature between the partition wall and the extension difference is hardly generated, it is possible to prevent the problem that stress is generated especially in the furnace wall pipe passage part of the dividing wall, and further prevent the problem that the drain flows into the hanger tube. You can

According to the second aspect of the present invention, the gas passage divided into a plurality of parts in the left-right direction can be formed by forming the dividing wall by the pipe penetrating the left and right furnace walls.

According to the third aspect of the present invention, the gas passage divided into a plurality of parts in the front-rear direction can be formed by forming the dividing wall by the pipe penetrating the front and rear furnace walls.

[Brief description of drawings]

FIG. 1 is a cut-away side view showing an example of an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II of FIG.

3 is a sectional view taken along the line III-III of FIG.

FIG. 4 is an enlarged perspective view of a portion IV in FIG.

FIG. 5 is a cut side view showing another example of the embodiment for carrying out the present invention.

6 is a sectional view taken along line VI-VI in FIG.

FIG. 7 is a cut side view showing an example of a conventional tower boiler.

8 is a sectional view taken along line VIII-VIII of FIG.

[Explanation of symbols]

 1 Front-side furnace wall (furnace wall) 2 Rear-side furnace wall (furnace wall) 3 Left-side furnace wall (furnace wall) 4 Right-side furnace wall (furnace wall) 7 Boiler body 9 Furnace wall tube 24 Header 25 Hanger tube 28 Steam-water separation device 28a Steam outlet 34 Sloped part 35 Pipe 36 Dividing wall 37 Dividing wall 38 Fin 39 Gas passage (gas passage) in the center 40 Gas passage on the left (gas passage) 41 Gas passage on the right (gas passage) 42 Low temperature side reheater (Reheater) 43 Low-temperature superheater (superheater) 44 Low-temperature superheater (superheater) 45 Gas flow rate adjustment damper 46 Gas flow rate adjustment damper 47 Gas flow rate adjustment damper 48 Dividing wall 49 Front side gas passage (gas passage) 50 Rear gas passage (gas passage) 51 Low temperature side reheater (reheater) 52 Low temperature side superheater (superheater) 53 Gas flow rate adjustment damper 54 Gas flow rate adjustment damper

Claims (3)

[Claims] 1. A pipe penetrating the furnace wall is provided at an upper position of the furnace wall of the boiler main body in which an upper end of the furnace wall pipe is connected to the steam separator, and the pipe is extended upward inside the boiler main body. After forming the inclined portion, it rises vertically upward and connects the tubes of the rising portion with fins to form dividing walls to form a plurality of gas passages, thereby forming a reheater and a superheater. Each of the gas passages is arranged in a separate gas passage, a gas flow rate adjusting damper is arranged in each of the gas passages, the upper end of the pipe forming the dividing wall is connected to the header of the hanger tube, and the dividing wall is formed. A tower boiler characterized in that the lower end of the pipe connected to the steam outlet of the steam separator. 2. The tower boiler according to claim 1, wherein a plurality of gas passages are formed in the left and right direction inside the boiler main body by forming a dividing wall by a pipe penetrating the furnace wall on the left side and the right side. 3. The tower boiler according to claim 1, wherein a plurality of gas passages are formed in the front-rear direction in the boiler main body by constructing the dividing wall by pipes penetrating the front and rear furnace walls.