JP2014178041A - Boiler system - Google Patents

Boiler system Download PDF

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Publication number
JP2014178041A
JP2014178041A JP2013050385A JP2013050385A JP2014178041A JP 2014178041 A JP2014178041 A JP 2014178041A JP 2013050385 A JP2013050385 A JP 2013050385A JP 2013050385 A JP2013050385 A JP 2013050385A JP 2014178041 A JP2014178041 A JP 2014178041A
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Japan
Prior art keywords
boiler
once
drain
air
combustion gas
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JP2013050385A
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Japanese (ja)
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JP6430099B2 (en
Inventor
Sohei Akinaga
草平 秋永
Hiroyuki Hatanaka
宏之 畑中
Tatsuki Kobayashi
立季 小林
Kazuhiro Kaminaga
和弘 上永
Tomohiro Okubo
智浩 大久保
Original Assignee
Miura Co Ltd
三浦工業株式会社
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Priority to JP2013050385A priority Critical patent/JP6430099B2/en
Publication of JP2014178041A publication Critical patent/JP2014178041A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22STEAM GENERATION
    • F22BMETHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B29/00Steam boilers of forced-flow type
    • F22B29/06Steam boilers of forced-flow type of once-through type, i.e. built-up from tubes receiving water at one end and delivering superheated steam at the other end of the tubes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22STEAM GENERATION
    • F22DPREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D1/00Feed-water heaters, i.e. economisers or like preheaters
    • F22D1/36Water and air preheating systems
    • F22D1/38Constructional features of water and air preheating systems
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22STEAM GENERATION
    • F22DPREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D11/00Feed-water supply not provided for in other main groups
    • F22D11/02Arrangements of feed-water pumps
    • F22D11/06Arrangements of feed-water pumps for returning condensate to boiler

Abstract

To provide a boiler system capable of further improving thermal efficiency when an open type drain recovery device and a boiler are combined.
A once-through boiler that generates steam by heating feed water with combustion gas, and a drain that is generated by agglomeration of steam generated by the once-through boiler is collected under atmospheric pressure, and the drain is supplied to the once-through boiler. A boiler system 1 including a drain recovery device 20 to be supplied, a combustion gas discharged from the once-through boiler 10, and a feed water heater 30 that performs heat exchange between the drain supplied to the once-through boiler 10, It further includes an air heater 40 for exchanging heat by circulating the combustion gas heat-exchanged in the feed water heater 30 and the combustion air supplied to the once-through boiler 10 in opposite directions.
[Selection] Figure 2

Description

  The present invention relates to a boiler system.
2. Description of the Related Art Conventionally, there has been proposed a drain recovery apparatus that supplies steam generated by a boiler to a load device, recovers drain generated from the steam used as a heat source in the load device, and reuses it as water supply to the boiler.
As such a drain recovery device, there is known an open type drain recovery device that recovers drain generated in a load device into an open drain recovery tank that is open to the atmosphere and supplies water to a boiler (for example, a patent). Reference 1).
By the way, in the boiler system, heat recovery from the combustion gas after being used for generating steam in the boiler cannot be sufficiently performed, and the thermal efficiency of the boiler system may be lowered.
For such problems, an economizer that performs heat exchange between water supplied to the boiler and the combustion gas after being used to generate steam is provided to recover heat from the combustion gas. A boiler system with improved thermal efficiency is known. However, when the drain generated in the load device is collected and supplied to the boiler, the temperature of the feed water introduced into the economizer is high, so that heat cannot be sufficiently recovered from the combustion gas.
  Therefore, in order to improve the thermal efficiency of the boiler system, an air heater for exchanging heat between the combustion gas and the combustion air supplied to the boiler as disclosed in Patent Document 2 is provided together with the economizer. Can be considered.
Japanese Patent Laid-Open No. 7-119918 JP-A-61-59114
  However, when the boiler system is configured to include an economizer and an air heater, the air heater may not be able to sufficiently recover heat from the combustion gas whose temperature has been recovered by the economizer and whose temperature has dropped.
  Therefore, an object of this invention is to provide the boiler system which can improve thermal efficiency more, when an open-type drain collection | recovery apparatus and a boiler are combined.
  The present invention relates to a once-through boiler that generates steam by heating feed water with combustion gas, and a drain that is generated by agglomeration of the steam generated by the once-through boiler is recovered under atmospheric pressure, and the drain is supplied to the once-through boiler. A boiler system comprising: a drain recovery device to be supplied; a combustion gas discharged from the once-through boiler; and a feed water heater for exchanging heat between the drain supplied to the once-through boiler, the feed water heating The present invention relates to a boiler system that further includes an air heater that performs heat exchange by circulating the combustion gas heat-exchanged in the boiler and the combustion air supplied to the once-through boiler in opposite directions.
  The heat recovery rate of the air heater is preferably 10% or less.
  Moreover, the temperature of the combustion air introduced into the air heater is −20 ° C. to 80 ° C., and the temperature of the combustion air after heat exchange in the air heater is 200 ° C. or less. It is preferable.
  In addition, the once-through boiler is a rectangular parallelepiped can body, and a plurality of can bodies disposed in the longitudinal direction and the width direction of the can body at predetermined intervals while being arranged extending in the vertical direction inside the can body. A water pipe, a burner which is provided on a first side surface located on one end side in the longitudinal direction of the can body, and injects and burns fuel in a substantially horizontal direction, and is located on the other end side in the longitudinal direction of the can body It is preferable to provide an exhaust pipe that is provided on the second side surface and discharges combustion gas generated inside the can body.
  According to the boiler system of the present invention, it is possible to provide a boiler system that can further improve thermal efficiency when an open-type drain recovery device and a boiler are combined.
It is a figure showing the composition of the boiler system concerning one embodiment of the present invention. It is the figure which showed typically the once-through boiler, feed water heater, and air heater which comprise the boiler system which concerns on the said embodiment. It is a vertical direction sectional view of the can of a once-through boiler. FIG. 4 is a sectional view taken along line AA in FIG. 3. It is a figure which shows the temperature distribution of the combustion gas and the combustion air in a countercurrent type heat exchange and a parallel flow type heat exchange.
Hereinafter, a preferred embodiment of a boiler system of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a configuration of a boiler system 1 according to an embodiment of the present invention. FIG. 2 is a diagram schematically illustrating the configuration of the once-through boiler 10, the feed water heater 30, and the air heater 40.
The boiler system 1 of this embodiment is provided with the boiler apparatus 70 comprised including the some once-through boiler 10, and the open type drain collection | recovery apparatus 20, as shown in FIG.
  As shown in FIGS. 1 and 2, the boiler device 70 is generated by a plurality of once-through boilers 10, a feed water heater 30 and an air heater 40 attached to each of the plurality of once-through boilers 10, and a plurality of once-through boilers 10. And a connecting pipe 72 that connects the plurality of once-through boilers 10 and the steam header 71 to each other.
The once-through boiler 10 generates steam by heating the feed water supplied to the inside with combustion gas. In the present embodiment, the drain recovered by a drain recovery device 20 described later is supplied as feed water to the once-through boiler 10 (a plurality of water pipes).
Details of the once-through boiler 10 and the feed water heater 30 and the air heater 40 will be described later.
As shown in FIG. 1, the steam generated by the plurality of once-through boilers 10 is supplied to the steam header 71 through a connecting pipe 72. The steam header 71 stores the steam generated by the plurality of once-through boilers 10 and supplies the steam to the load device 50.
The load device 50 uses the steam generated by the once-through boiler 10 as a heat source, and performs heat exchange with the object to be heated.
The drain recovery device 20 recovers the drain produced by agglomeration of the steam generated by the once-through boiler 10 in the load device 50 under atmospheric pressure, and supplies the recovered drain as feed water to the once-through boiler 10 again. Supply.
The drain recovery device 20 includes an open tank 21, a storage tank 22, a steam supply line L1, a first drain supply line L2, a second drain supply line L3, and a makeup water supply line L4.
  The open tank 21 collects and stores drainage generated by agglomeration of part of the steam used for heat exchange in the load device 50. The open tank 21 is opened under atmospheric pressure.
  The storage tank 22 is opened under atmospheric pressure. The storage tank 22 stores makeup water supplied to the once-through boiler 10.
The steam supply line L1 connects the steam header 71 and the load device 50 and supplies the steam generated by the once-through boiler 10 to the load device 50.
The first drain supply line L <b> 2 connects the load device 50 and the open tank 21 and supplies drain generated in the load device 50 to the open tank 21. In the first drain supply line L2, a steam trap 61, a check valve 62, and a motor valve 63 that discharge drain generated in the load device 50 and prevent discharge of steam are disposed.
  The second drain supply line L3 connects the open tank 21 and the once-through boiler 10 and supplies the drain accommodated in the open tank 21 to the once-through boiler 10. In the present embodiment, the upstream end portion of the second drain supply line L <b> 3 is connected to the lower portion of the open tank 21. Further, the downstream side of the second drain supply line L3 is branched so as to be connected to each of the plurality of cans 11.
  A drain pump 64 and a drain supply valve 65 are arranged in the second drain supply line L3. The drain pump 64 pressurizes the drain supplied from the open tank 21 and supplies it to the once-through boiler 10. The drain supply valve 65 is constituted by a motor valve and adjusts the amount of drain supplied from the open tank 21 to the once-through boiler 10.
  The makeup water supply line L <b> 4 connects the storage tank 22 and the open tank 21, and supplies water stored in the storage tank 22 to the open tank 21. A pump 69 is disposed in the makeup water supply line L4.
Next, the details of the once-through boiler 10 and the feed water heater 30 and the air heater 40 will be described. FIG. 3 is a vertical cross-sectional view of the can 11 of the once-through boiler 10. 4 is a cross-sectional view taken along line AA in FIG. 3 and is a horizontal cross-sectional view of the can 11.
As shown in FIGS. 3 and 4, the once-through boiler 10 includes a can 11, a plurality of water pipes 12, a connecting wall 13, a lower header 14, an upper header 15, a duct 16, a burner 17, And a cylinder 18.
The can body 11 is configured in a rectangular parallelepiped shape in a plan view.
The plurality of water pipes 12 are arranged extending in the vertical direction inside the can body 11 and are arranged at predetermined intervals in the longitudinal direction and the width direction of the can body 11.
In the present embodiment, the plurality of water tubes 12 are disposed along the longitudinal direction at the outer water tube group 12 a disposed along the side portion extending in the longitudinal direction of the can body 11 and at the center portion in the width direction of the can body 11. The central water pipe group 12b and the intermediate water pipe group 12c disposed between the outer water pipe group 12a and the central water pipe group 12b are classified.
The connection wall 13 connects the water pipes 12 arranged adjacent to each other in the outer water pipe group 12a.
  The lower header 14 is configured by a rectangular parallelepiped container having a rectangular shape in plan view, and is disposed at the lower portion of the can 11. The lower header 14 is connected to lower ends of the plurality of water pipes 12. Drain is supplied to the lower header 14 from the drain recovery device 20, and drain is supplied from the lower header 14 to the plurality of water pipes 12.
  The upper header 15 is configured by a rectangular parallelepiped container having a rectangular shape in plan view, and is disposed on the upper portion of the can body 11. The upper header 15 is connected to the upper ends of the plurality of water pipes 12. Steam generated in the plurality of water pipes 12 is collected in the upper header 15. A connecting pipe 72 (see FIG. 1) is connected to the upper header 15, and the steam collected in the upper header 15 is supplied to the steam header 71 through the connecting pipe 72.
  The duct 16 is connected to a lower portion of the first side surface 11 a located on one end side in the longitudinal direction of the can body 11. Connected to the upstream side of the duct 16 are a fuel supply unit 161 to which fuel gas is supplied and an air supply line AL (see FIG. 2) to which combustion air is supplied. The duct 16 mixes the fuel gas supplied from the fuel supply unit 161 and the combustion air supplied from the air supply path AL and supplies the mixed gas toward the inside of the can 11.
  The burner 17 is arrange | positioned in the connection part of the duct 16 and the can 11 in the 1st side surface 11a. The burner 17 ejects a mixed gas in which combustion air and fuel are mixed from the duct 16 into the can 11 and burns the mixed gas.
  The exhaust cylinder 18 is connected to the second side surface 11b located on the other end side in the longitudinal direction of the can body 11 (the side opposite to the side where the duct 16 is provided). The exhaust cylinder 18 discharges the combustion gas generated by burning the mixed gas inside the can 11.
In the present embodiment, as shown in FIG. 2, the exhaust cylinder 18 is bent from a first upward exhaust passage portion 181 extending upward from a connection portion with the can body 11 and an upper end portion of the first upward exhaust passage portion 181. A downward exhaust passage portion 182 extending downward, and a second upward exhaust passage portion 183 that is bent from the lower end portion of the downward exhaust passage portion 182 and extends upward.
According to the exhaust cylinder 18 described above, the combustion gas discharged from the can 11 circulates upward through the first upward exhaust passage portion 181, then flows downward through the downward exhaust passage portion 182, and It flows through the second upward exhaust passage 183 upward and is discharged to the outside.
The feed water heater 30 and the air heater 40 are provided in the exhaust pipe 18.
The feed water heater 30 performs heat exchange between the combustion gas discharged from the once-through boiler 10 and the drain supplied to the once-through boiler 10. In the present embodiment, the feed water heater 30 is disposed in the first upward exhaust path portion 181. More specifically, the feed water heater 30 is configured by disposing a part of the second drain supply line L3 (see FIG. 1) for supplying drain to the once-through boiler 10 in the first upward exhaust passage portion 181. The Moreover, in the feed water heater 30, the 2nd drain supply line L3 is arrange | positioned so that a drain may distribute | circulate from upper direction toward the downward direction.
  The air heater 40 performs heat exchange between the combustion gas heat-exchanged in the feed water heater 30 and the combustion air supplied to the once-through boiler 10. In the present embodiment, the air heater 40 is disposed in the downward exhaust path portion 182. More specifically, as shown in FIG. 2, the air heater 40 is configured such that a part of the air supply line AL that supplies combustion air from the blower 80 to the once-through boiler 10 (duct 16) has a downward exhaust path portion 182. It is comprised by arranging in. Further, in the air heater 40, the air supply line AL is arranged so that the combustion air flows from below to above. That is, in the air heater 40 of the present embodiment, countercurrent heat exchange is performed in which the combustion gas and the combustion air flow in opposite directions to exchange heat.
Here, in the present embodiment, the heat recovery rate from the combustion gas is preferably 10% or less, more preferably 2% to 3% by performing countercurrent heat exchange in the air heater 40. . In particular, when the heat recovery rate in the air heater 40 is 2% to 3%, the air heater 40 is used when air having an outside air temperature (for example, 0 ° C. to 50 ° C.) is used as the combustion air. The temperature of the combustion air after heat exchange in can be made 200 ° C. or lower.
It should be noted that the heat recovery rate from the combustion gas includes the inlet temperature of the combustion gas to the air heater 40, the outlet temperature of the combustion gas from the air heater 40, the flow rate of the combustion gas, and the air heater of the combustion air. It is determined based on the inlet temperature to 40, the outlet temperature of combustion air from the air heater 40, and the flow rate of combustion air.
Next, operation | movement of the boiler system 1 of this embodiment is demonstrated.
In the present embodiment, first, steam is generated in the once-through boiler 10. Specifically, first, the fuel gas and the combustion air are mixed in the duct 16, and the mixed gas of the combustion gas and the combustion air is ejected from the burner 17 into the can 11 and burned. Next, the plurality of water pipes 12 are heated by the combustion gas generated by the combustion of the mixed gas, and steam is generated from the feed water (drain) supplied to the inside of the plurality of water pipes 12. The steam generated inside the plurality of water pipes 12 is collected in the upper header 15 and then supplied to the steam header 71 via the connecting pipe 72.
The steam supplied to the steam header 71 becomes drain after being used in the load device 50 and is stored in the open tank 21 under atmospheric pressure. The drain stored in the open tank 21 is supplied as feed water to the once-through boiler 10 through the second drain supply line L3. The temperature of the feed water supplied from the open tank 21 to the once-through boiler 10 through the second drain supply line L3 is about 10 ° C to 100 ° C.
  On the other hand, the combustion gas G1 used for generating steam inside the can 11 flows upward through the first upward exhaust passage portion 181 (see G2 in FIG. 2), and then downwards through the downward exhaust passage portion 182. 2 (see G3 in FIG. 2), further flows upward through the second upward exhaust passage portion 183 (see G4 in FIG. 2), and is discharged to the outside (see G5 in FIG. 2).
  Here, in the present embodiment, the feed water heater 30 is disposed in the first upward exhaust passage portion 181, and the air heater 40 is disposed in the downward exhaust passage portion 182. The air heater 40 is designed so that the heat recovery rate is 10% or less, preferably 2% to 3%. Thereby, the combustion gas (for example, 250 ° C. to 350 ° C.) discharged from the can body 11 is first drained (for example, 140 ° C. to 170 ° C.) through the feed water heater 30 in the first upward exhaust passage portion 181. ) And heat is recovered. In addition, the combustion gas (for example, 140 ° C. to 200 ° C.) heat-recovered in the feed water heater 30 is combusted air (for example, −20 ° C. to 80 ° C.) flowing through the air heater 40 in the downward exhaust path 182. ) And heat is recovered. And the combustion gas (for example, 80 degreeC-120 degreeC) by which heat recovery was carried out in the air heater 40 is discharged | emitted outside.
  As described above, in this embodiment, the feed water heater 30 is disposed in the first upward exhaust passage portion 181, and the air heater 40 is disposed in the downward exhaust passage portion 182, thereby using high-temperature drain as the feed water. Even in such a case, the heat of the combustion gas that could not be recovered by the feed water heater 30 is given to the combustion air, so that the thermal efficiency (boiler efficiency) of the boiler system 1 can be improved.
Further, in the air heater 40 disposed in the downward exhaust passage portion 182, the air supply line AL is disposed so that the combustion air flows from the lower side to the upper side. Thereby, since the flow of the combustion gas in the downward exhaust passage 182 and the flow of the combustion air in the air heater 40 can be opposed to each other, in the air heater 40, the combustion gas and the combustion air are made to be opposite to each other. Counterflow heat exchange is performed. Therefore, the heat recovery rate from the combustion gas can be increased as compared with the parallel flow type heat exchange in which the combustion gas and the combustion air flow in the same direction. That is, as shown in FIG. 5 (a), according to the countercurrent heat exchange, the combustion air first exchanged heat with the coldest portion T4 of the combustion gas in the coldest portion T1. Thereafter, heat exchange is performed with the hottest portion T3 of the combustion gas in the hottest portion T2. As a result, as shown in FIG. 5 (b), first, more than the parallel flow heat exchange in which heat exchange is performed between the coldest portion T1 of the combustion air and the hottest portion T3 of the combustion gas. Heat recovery. Further, the temperature of combustion air after heat exchange (combustion air outlet temperature) T2 can be made higher than the temperature of combustion gas after combustion (combustion gas outlet temperature) T4 (FIG. 5). (See (a)).
5, the vertical axis indicates the temperature of the combustion air and the combustion gas, and the horizontal axis indicates the heat exchange distance that is the distance from the inlet of the combustion air in the air heater 40.
  Specifically, according to the air heater 40 of the present embodiment, the temperature of the combustion gas heat recovered in the feed water heater 30 can be reduced from about 140 ° C. to 200 ° C. to about 80 ° C. to 120 ° C., Thereby, heat recovery of 2% to 3% can be performed.
  Further, since the heat recovery rate in the air heater 40 is 10% or less, preferably 2% to 3%, the temperature of the combustion air that is heated in the air heater 40 and supplied to the once-through boiler 10 becomes high. You can prevent too much. Therefore, the thermal efficiency of the boiler system 1 can be improved and an increase in NOx contained in the combustion gas (exhaust gas) discharged from the once-through boiler 10 can be suppressed.
  Further, it has been found that NOx contained in the combustion gas greatly increases when the temperature of the combustion air supplied to the once-through boiler 10 exceeds 200 ° C. And in the once-through boiler 10, the air of the environment where the boiler system 1 is installed is used as combustion air. Therefore, when the temperature of the combustion air introduced into the air heater 40 (that is, the outside air temperature) is 0 ° C. to 50 ° C., the temperature of the combustion air subjected to heat exchange is 200 ° C. or less. The air heater 40 was arranged in the. Thereby, it is possible to suppress an increase in NOx contained in the exhaust gas discharged from the once-through boiler 10 while improving the thermal efficiency of the boiler system 1 by performing heat recovery with the air heater 40.
  Further, the once-through boiler 10 is fueled from a rectangular parallelepiped can body 11, a plurality of water pipes 12 arranged in the can body 11 at predetermined intervals in the longitudinal direction and the width direction, and a side surface of the can body 11. And a burner 17 for injecting and burning gas. Thereby, compared with the boiler which has a combustion chamber in the center part of the can 11, the time after the fuel gas combusts in the burner 17 until heat transfer to the several water pipe 12 can be shortened. Therefore, since the combustion temperature (flame temperature) of the fuel gas in the burner 17 can be lowered, the generation of NOx can be further reduced.
As mentioned above, although one preferable embodiment of the boiler system 1 of this invention was described, this invention is not restrict | limited to embodiment mentioned above and can change suitably.
For example, in the present embodiment, the exhaust pipe 18 includes the first upward exhaust passage portion 181, the downward exhaust passage portion 182, and the second upward exhaust passage portion 183, but is not limited thereto. That is, the exhaust pipe may be configured by a downward exhaust passage portion whose upper end portion is connected to the can body and an upward exhaust passage portion connected to the lower end portion of the downward exhaust passage portion. In this case, a feed water heater may be disposed in the downward exhaust passage and an air heater may be disposed in the upward exhaust passage.
DESCRIPTION OF SYMBOLS 1 Boiler system 10 Through-flow boiler 11 Can 11a 1st side surface 11b 2nd side surface 12 Water pipe 17 Burner 18 Exhaust pipe 20 Drain collection device 30 Feed water heater 40 Air heater 181 1st upward discharge path part (upward discharge path part)
182 Downward discharge passage

Claims (4)

  1. A once-through boiler that generates steam by heating feed water with combustion gas;
    A drain recovery device that recovers the drain generated by the condensation of steam generated by the once-through boiler under atmospheric pressure, and supplies the drain to the once-through boiler;
    A boiler system comprising a combustion gas discharged from the once-through boiler and a feed water heater that performs heat exchange between the drain supplied to the once-through boiler,
    A boiler system further comprising an air heater for exchanging heat by circulating the combustion gas exchanged in the feed water heater and the combustion air supplied to the once-through boiler in opposite directions.
  2.   The boiler system according to claim 1, wherein the heat recovery rate of the air heater is 10% or less.
  3.   The temperature of combustion air introduced into the air heater is -20 ° C to 80 ° C, and the temperature of combustion air after heat exchange in the air heater is 200 ° C or less. The boiler system according to 1 or 2.
  4. The once-through boiler is
    A rectangular parallelepiped can,
    A plurality of water pipes arranged in the can body so as to extend in the vertical direction and arranged at predetermined intervals in the longitudinal direction and the width direction of the can body,
    A burner which is provided on a first side surface located on one end side in the longitudinal direction of the can body and which burns by burning fuel in a substantially horizontal direction;
    The boiler according to any one of claims 1 to 3, further comprising: an exhaust pipe that is provided on a second side surface located on the other end side in the longitudinal direction of the can body and discharges combustion gas generated inside the can body. system.
JP2013050385A 2013-03-13 2013-03-13 Boiler system Active JP6430099B2 (en)

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JP2013050385A JP6430099B2 (en) 2013-03-13 2013-03-13 Boiler system
PCT/JP2014/052472 WO2014141770A1 (en) 2013-03-13 2014-02-03 Boiler system

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JP6430099B2 JP6430099B2 (en) 2018-11-28

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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5856043B2 (en) * 1977-12-29 1983-12-13 Ebara Mfg
JPS61186905U (en) * 1985-05-14 1986-11-21
JPS6438503A (en) * 1987-07-31 1989-02-08 Kawasaki Heavy Ind Ltd Heat recovery device for boiler exhaust gas
JPH11118104A (en) * 1997-10-20 1999-04-30 Mitsubishi Heavy Ind Ltd Boiler
JP2006105442A (en) * 2004-10-01 2006-04-20 Maeda Tekkosho:Kk Pressure drain collecting system
JP2009068798A (en) * 2007-09-14 2009-04-02 Toshiba Corp System for optimal operation of thermal power plant
JP2011208846A (en) * 2010-03-29 2011-10-20 Hitachi Ltd Boiler apparatus
JP2012002385A (en) * 2010-06-14 2012-01-05 Miura Co Ltd Boiler water supply system
JP2012017965A (en) * 2010-06-11 2012-01-26 Miura Co Ltd Boiler system
JP2012072991A (en) * 2010-09-29 2012-04-12 Miura Co Ltd Economizer control device, economizer, and boiler
JP6056371B2 (en) * 2012-10-22 2017-01-11 三浦工業株式会社 Boiler system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009264663A (en) * 2008-04-25 2009-11-12 Miura Co Ltd Economizer and boiler

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5856043B2 (en) * 1977-12-29 1983-12-13 Ebara Mfg
JPS61186905U (en) * 1985-05-14 1986-11-21
JPS6438503A (en) * 1987-07-31 1989-02-08 Kawasaki Heavy Ind Ltd Heat recovery device for boiler exhaust gas
JPH11118104A (en) * 1997-10-20 1999-04-30 Mitsubishi Heavy Ind Ltd Boiler
JP2006105442A (en) * 2004-10-01 2006-04-20 Maeda Tekkosho:Kk Pressure drain collecting system
JP2009068798A (en) * 2007-09-14 2009-04-02 Toshiba Corp System for optimal operation of thermal power plant
JP2011208846A (en) * 2010-03-29 2011-10-20 Hitachi Ltd Boiler apparatus
JP2012017965A (en) * 2010-06-11 2012-01-26 Miura Co Ltd Boiler system
JP2012002385A (en) * 2010-06-14 2012-01-05 Miura Co Ltd Boiler water supply system
JP2012072991A (en) * 2010-09-29 2012-04-12 Miura Co Ltd Economizer control device, economizer, and boiler
JP6056371B2 (en) * 2012-10-22 2017-01-11 三浦工業株式会社 Boiler system

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WO2014141770A1 (en) 2014-09-18

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