KR101039409B1 - Furnace of boiler for power station - Google Patents

Furnace of boiler for power station Download PDF

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Publication number
KR101039409B1
KR101039409B1 KR1020080093201A KR20080093201A KR101039409B1 KR 101039409 B1 KR101039409 B1 KR 101039409B1 KR 1020080093201 A KR1020080093201 A KR 1020080093201A KR 20080093201 A KR20080093201 A KR 20080093201A KR 101039409 B1 KR101039409 B1 KR 101039409B1
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South Korea
Prior art keywords
water pipe
pipe wall
furnace
flame
outer water
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KR1020080093201A
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Korean (ko)
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KR20100034192A (en
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김병두
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김병두
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Priority to KR1020080093201A priority Critical patent/KR101039409B1/en
Application filed by 김병두 filed Critical 김병두
Priority to CN200980132078.6A priority patent/CN102124266B/en
Priority to CN201410218765.2A priority patent/CN104048285B/en
Priority to AU2009297366A priority patent/AU2009297366B2/en
Priority to PCT/KR2009/005348 priority patent/WO2010035992A2/en
Priority to JP2011514507A priority patent/JP5198658B2/en
Priority to RU2010151865/06A priority patent/RU2470224C2/en
Priority to US12/565,569 priority patent/US8707912B2/en
Publication of KR20100034192A publication Critical patent/KR20100034192A/en
Application granted granted Critical
Publication of KR101039409B1 publication Critical patent/KR101039409B1/en
Priority to JP2012233110A priority patent/JP5410590B2/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B1/00—Combustion apparatus using only lump fuel
    • F23B1/02—Combustion apparatus using only lump fuel for indirect heating of a medium in a vessel, e.g. for boiling water
    • F23B1/04—External furnaces, i.e. with furnace in front of the vessel
    • F23B1/06—External furnaces, i.e. with furnace in front of the vessel for heating water-tube boilers, e.g. Tenbrink flue furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B21/00—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically
    • F22B21/02—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from substantially straight water tubes
    • F22B21/04—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from substantially straight water tubes involving a single upper drum and a single lower drum, e.g. the drums being arranged transversely
    • F22B21/06—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from substantially straight water tubes involving a single upper drum and a single lower drum, e.g. the drums being arranged transversely the water tubes being arranged annularly in sets, e.g. in abutting connection with drums of annular shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B21/00—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically
    • F22B21/02—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from substantially straight water tubes
    • F22B21/04—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from substantially straight water tubes involving a single upper drum and a single lower drum, e.g. the drums being arranged transversely
    • F22B21/08—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from substantially straight water tubes involving a single upper drum and a single lower drum, e.g. the drums being arranged transversely the water tubes being arranged sectionally in groups or in banks, e.g. bent over at their ends
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/10—Water tubes; Accessories therefor
    • F22B37/12—Forms of water tubes, e.g. of varying cross-section
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B2700/00—Combustion apparatus for solid fuel
    • F23B2700/003—Combustion apparatus for solid fuel adapted for use in water-tube boilers

Abstract

본 발명은 외부수관벽과 내부수관벽에 의해 형성되는 연소공간을 화염의 모양과 가장 근접하게 형성하여 화염과의 접촉면적을 증가시켜 노의 수관벽에서 가열되는 물의 온도를 향상시킬 수 있게 하여 열효율을 증대시킬 수 있게 한 발전소용 보일러 노에 관한 것이다.The present invention forms the combustion space formed by the outer and inner water pipe walls closest to the shape of the flame to increase the contact area with the flame to improve the temperature of the water heated in the water pipe wall of the furnace to improve thermal efficiency It is about a boiler furnace for a power plant which makes it possible to increase.

본 발명은 내부 가장자리에 노벽(2)을 따라 단열재를 사이에 두고 설치되는 다수개의 수관이 연결되어 이루어진 외부수관벽(10)과, 상기 외부수관벽(10)의 내측에 위치하면서 역시 다수개의 수관이 연결되어 이루는 내부수관벽(20)으로 이루어진 통상의 발전소용 보일러 노에 있어서, 아래쪽에서 중앙부위(M)까지의 상기 외부수관벽(10)은 직경이 더 넓어지거나 또는 동일한 형상으로 이루어지고, 상기 내부수관벽(20)은 외부수관벽(10)을 기준으로 아래쪽의 직경이 점점 좁아지다가 넓어지는 형상으로 이루어지며, 중앙부위(M)에서 상부쪽까지의 상기 외부수관벽(10)은 직경이 좁아지다가 다시 넓어지는 형상으로 이루어지고, 상기 내부수관벽(20)은 상기 외부수관벽에 평행하게 직경이 좁아지다가 다시 넓어지는 형상으로 이루어져, 내외부수관벽의 폭이 일정하게 유지되면서 굴곡진 것을 특징으로 한다.According to the present invention, the outer water pipe wall 10 is formed by connecting a plurality of water pipes interposed between the insulator along the furnace wall 2, and the plurality of water pipes are located inside the outer water pipe wall 10. In the conventional boiler furnace for the power plant consisting of the inner water pipe wall 20 is formed, the outer water pipe wall 10 from the bottom to the central portion (M) is wider or made of the same shape, The inner water pipe wall 20 has a shape in which the diameter of the lower portion becomes narrower and wider based on the outer water pipe wall 10, and the outer water pipe wall 10 from the central portion M to the upper side has a diameter. The narrowing and widening is made again, and the inner water pipe wall 20 has a shape narrowing in parallel to the outer water pipe wall and widening again, and the width of the inner and outer water pipe walls is constant. As to maintain characterized in that curved.

발전소용 보일러, 외부수관벽, 내부수관벽, 화염, Boiler for power plant, external water pipe wall, internal water pipe wall, flame,

Description

발전소용 보일러 노{Furnace of boiler for power station}Furnace of boiler for power station

본 발명은 외부수관벽과 내부수관벽에 의해 형성되는 연소공간을 화염의 모양과 가장 근접하게 형성하여 화염과의 접촉면적을 증가시켜 노의 수관벽에서 가열되는 물의 온도를 향상시킬 수 있게 하여 열효율을 증대시킬 수 있게 한 발전소용 보일러 노에 관한 것이다.The present invention forms the combustion space formed by the outer and inner water pipe walls closest to the shape of the flame to increase the contact area with the flame to improve the temperature of the water heated in the water pipe wall of the furnace to improve thermal efficiency It is about a boiler furnace for a power plant which makes it possible to increase.

일반적으로 화력발전소에서 많이 사용하는 보일러는 석탄용 보일러와 석유용보일러, 가스용보일러 로 대별되며, 그중 발전량의 다수를 차지하는 것이 석탄발전 보일러이며 석탄발전소는 다시 미분탄 보일러와 유동층 보일러로 대별된다.In general, boilers commonly used in thermal power plants are classified into coal boilers, petroleum boilers, and gas boilers, and a majority of the power generation is coal-fired boilers, and coal power plants are divided into pulverized coal boilers and fluidized bed boilers.

상기 미분탄 보일러는 미분탄을 연소시키므로 연소효율이 높은 대신 고온연소로 인해 대기환경에 유해한 질소산화물이 생성되어 질소산화물을 처리할 수 있는 대형집진설비를 갖출 수 있는 대형발전소에서 채택하고 있다. 상기 유동층 보일러는 굵은 알맹이 석탄을 연소시키므로 연소온도가 낮아 질소산화물 생성이 억제되는 대신에, 연소온도가 낮기 때문에 화염에서 수관으로 전달되는 전열효과를 높이기 위해 모래를 노의 아래쪽에서부터 위쪽으로 불어 올려 모래를 가열시키고, 이렇게 가열된 모래가 노의 외곽에 배치된 수관벽을 타고 아래로 내려오게 함으로써 열효율을 상승시키도록 하고 있다.Since the pulverized coal boiler burns pulverized coal, the combustion efficiency is high, but it is adopted in a large power plant that can be equipped with a large dust collecting facility capable of treating nitrogen oxides by generating nitrogen oxides harmful to the atmosphere due to high temperature combustion. Since the fluidized bed boiler burns coarse coal, the combustion temperature is low and nitrogen oxide production is suppressed. Instead, the combustion temperature is low, and the sand is blown up from the bottom of the furnace to increase the heat transfer effect from the flame to the water pipe. And the heated sand is lowered down the wall of the water pipe disposed on the outside of the furnace to increase the thermal efficiency.

이러한 이유 때문에 연소효율이 높은 미분탄 보일러에서는 질소산화물의 생성을 억제하는 연구가 진행되고 있는 한편, 유동층 보일러에서는 규모를 확대시켜 열효율을 높이게 하는 시도가 진행되고 있다.For this reason, studies have been conducted to suppress the generation of nitrogen oxides in pulverized coal boilers with high combustion efficiency, while attempts have been made to increase the thermal efficiency by expanding the scale in fluidized bed boilers.

본 발명에서는 석탄화력 발전의 대부분을 차지하는 미분탄 보일러를 예로 설명하기로 한다In the present invention, a pulverized coal boiler, which occupies most of coal-fired power generation, will be described as an example.

기존 미분탄 보일러에서는 노상부에 7km에 달하는 수관을 상하 죄우로 지그재그 배열하여 상향하면서 빠져나가는 화염으로부터 최대한 열을 흡수하고 있다.Existing pulverized coal boiler absorbs heat as much as possible from the escaping flame by zigzag arrangement of up to 7km of water pipes on the roadbed.

화염으로부터의 열흡수효율을 촘촘히 높게 배열한 수관에 의해 높이는 방법을 채택하고 있어, 물을 순환시키는 급수펌프의 부하가 비정상적으로 커져있다. The method of raising the heat absorption efficiency from a flame by the water pipe arranged in high density is adopted, and the load of the water supply pump which circulates water becomes abnormally large.

발전소 소내전력의 30-40%를 이 급수펌프를 돌리는 모타가 소모해 버리고 있다. 그러면서도 질소산화물을 대량 배출하고, 재를 끈적한 슬래그화시켜 많은 클링커를 만들고 여과장치를 fouling 하여 저렴한 저급탄을 사용할 수 없는 약점도 가지고 있다.30-40% of the plant's on-site power is being consumed by a motor running this feed pump. At the same time, it has a weak point that large amounts of nitrogen oxides are released, ashes are sticky slag to make a lot of clinkers, and fouling filtration equipment can not be used for cheap low-grade coal.

이러한 문제를 해결하기 위하여, 본 출원인이 발명한 대한민국등록특허 제10-0764903호에서는 도 1에 도시된 바와 같이 노의 가장자리를 따라 배치된 외부수관벽(10)의 중심에 다수 개의 수관 다발로 이루어진 내부수관벽(8)을 설치하여, 상기 내외부수관벽(8,6)의 사이에서 외부수관벽(10)에 고르게 설치된 연료분사노즐에 서 내부수관벽(8)의 접선방향으로 분사되어 관형화염을 이루면서 연소되게 함으로써, 화염이 한점에 집중되어 초고온으로 상승되는 현상이 발생하지 않게 함과 더불어, 필요시 상기 내부수관벽(8)에 형성된 공기 분사구멍을 통하여 찬 외기가 내외부수관벽(8,6)사이의 연소공간(S) 속으로 유입되게 함으로써, 화염(F)의 온도가 지나치게 초고온으로 상승하는 것을 방지해 줄 수가 있으므로, 고온의 화염에 의해 공기중의 질소가 연소하여 질소산화물이 발생하는 것을 저감할 수가 있도록 하였다.In order to solve this problem, in the Republic of Korea Patent No. 10-0764903 invented by the present applicant consists of a plurality of water pipe bundles in the center of the outer water pipe wall 10 disposed along the edge of the furnace as shown in FIG. An inner water pipe wall (8) is provided and is injected in the tangential direction of the inner water pipe wall (8) from a fuel injection nozzle installed evenly on the outer water pipe wall (10) between the inner and outer water pipe walls (8,6). In this case, the flame is concentrated at one point so that the phenomenon of rising to ultra-high temperature does not occur, and if necessary, cold air is blown through the air injection holes formed in the inner water pipe wall 8, and the inner and outer water pipe walls 8, 6) It is possible to prevent the temperature of the flame (F) from rising to an extremely high temperature by letting it into the combustion space (S) in between, so that nitrogen in the air is burned by the high temperature flame. So it can not be reduced to an oxide occurs.

그러나, 이러한 대한민국등록특허 제10-0764903호는 노속에서 발생된 대류가스의 많은열이 노옆의 수관벽에 전달, 흡수되지 못하고 상부로 올라가, 과열기와 재열기를 통과하면서 남은 열을 흡수시키게 함으로서 상층부의 높이가 매우 높아지는 문제가 있다.However, the Republic of Korea Patent No. 10-0764903 is the upper layer by absorbing the remaining heat while passing through the superheater and reheater to the upper portion of the convection gas generated in the furnace is not transferred to the water pipe wall near the furnace, absorbed. There is a problem that the height of the very high.

본 발명의 목적은 외부수관벽과 내부수관벽에 의해 형성되는 연소공간을 화염의 모양과 가장 근접하게 형성하여 화염과의 접촉면적을 증가시켜 노의 수관벽에서 가열되는 물의 온도를 향상시킬 수 있게 하여 하부열흡수효율을 증대시킬 수 있게 한 발전소용 보일러 노에 관한 것이다.An object of the present invention is to form the combustion space formed by the outer and inner water wall wall closest to the shape of the flame to increase the contact area with the flame to improve the temperature of the water heated in the water pipe wall of the furnace The present invention relates to a boiler furnace for a power plant that can increase bottom heat absorption efficiency.

본 발명의 또 다른 목적은 화염의 상부에서 형성되어 대류열을 지닌 대류가스가 통과할 수 있도록 굴곡부위를 형성하여 대류가스의 대류열도 노의 수관벽에서 흡수하여 열효율을 더욱 향상시킬 수 있는 발전소용 보일러 노에 관한 것이다.Another object of the present invention is to form a bent portion to pass through the convection gas having convection heat formed in the upper portion of the flame convection heat of the convection gas is also absorbed in the water pipe wall of the furnace for power plant that can further improve thermal efficiency It's about a boiler furnace.

본 발명의 발전소용 보일러 노는, 내부 가장자리에 노벽(2)을 따라 단열재를 사이에 두고 설치되는 다수개의 수관이 연결되어 이루어진 외부수관벽(10)과, 상기 외부수관벽(10)의 내측에 위치하면서 역시 다수개의 수관이 연결되어 이루는 내부수관벽(20)으로 이루어진 통상의 발전소용 보일러 노에 있어서,
아래쪽에서 중앙부위(M)까지의 상기 외부수관벽(10)은 직경이 더 넓어지거나 또는 동일한 형상으로 이루어지고, 상기 내부수관벽(20)은 외부수관벽(10)을 기준으로 아래쪽의 직경이 점점 좁아지다가 넓어지는 형상으로 이루어지며, 중앙부위(M)에서 상부쪽까지의 상기 외부수관벽(10)은 직경이 좁아지다가 다시 넓어지는 형상으로 이루어지고, 상기 내부수관벽(20)은 상기 외부수관벽에 평행하게 직경이 좁아지다가 다시 넓어지는 형상으로 이루어져, 내외부수관벽의 폭이 일정하게 유지되면서 굴곡진 것을 특징으로 한다.Boiler furnace for the power plant of the present invention, located on the inner edge of the outer water pipe wall 10 and the outer water pipe wall 10 is formed by connecting a plurality of water pipes are installed along the furnace wall (2) with the insulating material interposed therebetween. In the boiler furnace for a conventional power plant consisting of an inner water pipe wall 20 formed by connecting a plurality of water pipes,
The outer water pipe wall 10 from the bottom to the central portion (M) is wider in diameter or made of the same shape, the inner water pipe wall 20 has a diameter of the lower side relative to the outer water pipe wall (10) It becomes narrower and wider, the outer water pipe wall 10 from the central portion (M) to the upper side is made of a shape that narrows and widens again, the inner water pipe wall (20) is the outer The diameter is narrowed parallel to the water pipe wall and then widened again, the width of the inner and outer water pipe walls is kept constant and is curved.

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본 발명의 발전소용 보일러 노는 화염이 형성되는 외부수관벽과 내부수관벽의 연소공간이 화염의 모양과 가장 근접하게 형성되기 때문에 각 수관벽들이 화염과의 접촉면적이 증대되어 노의 수관벽에서 가열되는 물의 온도를 향상시켜 열효율을 증대시킬 수 있는 장점이 있다.Boiler furnace for power plant of the present invention is because the combustion space of the outer water pipe wall and the inner water pipe wall in which the flame is formed is formed closest to the shape of the flame, each of the water pipe walls are heated in the furnace water pipe wall by increasing the contact area with the flame There is an advantage that can increase the thermal efficiency by improving the temperature of the water.

또한, 화염의 상부에서 형성되어 대류열을 지닌 대류가스가 외부수관부와 내부수관부가 형성하는 굴곡부위를 통과하면서 대류가스의 대류열도 노의 수관벽에서 흡수하여 더욱 열효율을 향상시킬 수 있는 장점이 있다.In addition, the convective gas formed in the upper part of the flame and having convective heat passes through the bent portion formed by the outer and inner water pipe portions, and the convective heat of the convective gas is also absorbed from the water pipe wall of the furnace, thereby improving thermal efficiency. have.

이하 본 발명을 첨부한 예시도면을 참조하여 자세히 설명한다. 이때, 기수분리기 등의 각종 장치는 기존보일러의 장치와 동일하므로 별도의 설명은 생략한다.Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail. At this time, since various devices such as a separator is the same as the existing boiler device, a separate description thereof will be omitted.

도 2는 본 발명의 실시예에 따른 발전소용 보일러 노에 대한 부분 절개 사시도이고, 도 3은 본 발명의 실시예에 따른 발전소용 보일러 노의 단면도이고, 도 4는 본 발명의 실시예에 따른 발전소용 보일러의 연소실에 설치된 내외부 수관벽의 배치상태를 나타낸 평단면도이며, 도 5는 본 발명의 실시예에 따른 발전소용 보일러의 연소실에 설치되는 내부수관벽에 형성되는 공기분사구멍의 수직 단면도이다.2 is a partial cutaway perspective view of a boiler furnace for a power plant according to an embodiment of the present invention, Figure 3 is a cross-sectional view of a boiler furnace for a power plant according to an embodiment of the present invention, Figure 4 is a power generation according to an embodiment of the present invention FIG. 5 is a cross-sectional plan view illustrating an arrangement of internal and external water pipe walls installed in a combustion chamber of a small boiler, and FIG. 5 is a vertical cross-sectional view of an air injection hole formed in an internal water pipe wall installed in a combustion chamber of a power plant boiler according to an embodiment of the present invention.

도시한 바와 같이, 본 발명에 따른 미분탄 보일러 노(1)는 내부 가장자리에 노벽(2)을 따라 다수개의 수관이 연결되어 이루는 외부수관벽(10)이 단열재(4)를 사이에 두고 설치되고, 상기 외부수관벽(10) 속에 역시 다수개의 수관이 연결되어 이루는 내부수관벽(20)이 설치된다. As shown, the pulverized coal boiler 1 according to the present invention is provided with an outer water pipe wall 10 formed by connecting a plurality of water pipes along the furnace wall 2 to an inner edge with an insulating material 4 interposed therebetween. In the outer water pipe wall 10, an inner water pipe wall 20 formed by connecting a plurality of water pipes is also installed.

외부수관벽(10)과 내부수관벽(20)을 형성하는 각각의 수관 내부에 물이 통과되고, 외부수관벽(10)의 하단에는 물을 공급받는 제1하부헤드(12)가 설치되고, 상단에는 가열된 물과 증기를 모으는 제1상부헤드(14)가 설치된다. 그리고, 내부수관벽(20)의 하단에도 물을 공급받는 제2하부헤드(22)가 설치되고, 상단에는 역시 가열된 물과 증기를 모으는 제2상부헤드(24)가 설치된다. 이러한 외부수관벽(10)과 내부수관벽(20)은 쫄대형의 연결판인 멤브레인을 수관사이마다 병렬 위치시켜 수관과 멤브레인을 병렬용접 연결되어 벽형상으로 형성되어 지지된다.Water is passed through each of the water pipes forming the outer water pipe wall 10 and the inner water pipe wall 20, and a first lower head 12 receiving water is provided at a lower end of the outer water pipe wall 10. At the top, a first upper head 14 for collecting heated water and steam is installed. In addition, a second lower head 22 receiving water is also installed at a lower end of the inner water pipe wall 20, and a second upper head 24 which collects heated water and steam is also installed at the upper end. The outer water pipe wall 10 and the inner water pipe wall 20 are supported by being formed in a wall shape by connecting the water pipe and the membrane in parallel welding by placing a membrane, which is a large connecting plate, between the water pipes in parallel.

그리고, 제1상부헤드(14) 및 제2상부헤드(24)는 노(1)의 상부에 설치된 과열기(도시안됨)와 연결되어 있다.In addition, the first upper head 14 and the second upper head 24 are connected to a superheater (not shown) installed in the upper part of the furnace 1.

한편, 외부수관벽(10)은 아래쪽에서 중앙부위까지 직경이 조금씩 넓어지거나 동일한 형상으로 이루어지고, 중앙부위(M)에서 상부쪽까지 직경이 좁아지다가 다시 넓어지는 형상으로 이루어진다. 그리고, 내부수관벽(20)은 외부수관벽(10)의 내측에 위치하면서 아래쪽에서 중앙부위까지 외부수관벽(10)을 기준으로 아래쪽의 직경이 점점 좁아지다가 넓어지는 형상이고 중앙부위(M)에서 상부쪽까지 직경이 좁아지다가 다시 넓어지는 형상으로 이루어진다.On the other hand, the outer water pipe wall 10 is formed in a shape that is slightly wider or the same shape from the bottom to the central portion, the diameter is narrowed from the central portion (M) to the upper side and then widened again. In addition, the inner water pipe wall 20 is located inside the outer water pipe wall 10 and has a shape in which the diameter of the lower portion becomes narrower and wider with respect to the outer water pipe wall 10 from the bottom to the center portion, and the center portion (M). The diameter is narrowed to the upper side in the form of a widening again.

이에 따라, 내외부수관벽(10,6) 사이에 형성되는 연소공간(S)은 아래쪽에서 중앙부위(M)까지의 간격은 점점 넓어지다가 좁아지는 형상으로 이루어지고, 중앙부위(M)에서 상부쪽까지의 간격은 거의 동일하게 형성된다. 즉, 하부는 항아리 같이 외부로 볼록하고 상부는 직경이 작아지면서 굴곡이져서 내외부수관벽 사이에서 발생된 촛불형태의 화염이 상부로 빠져나가게 된다. 이때 전방향으로 발사되는 화염의 복사열은 상하로 포위된 넓은 표면적을 데우고, 화염에 실린 대류열은 중앙부위와 상부쪽의 굴곡부위를 통과하면서 더 많은 수관들과 접촉하게 되여 수관에의 열전달을 높일 수 있다.Accordingly, the combustion space S formed between the inner and outer water pipe walls 10 and 6 has a shape in which the interval from the lower side to the central portion M becomes wider and narrower, and the upper portion at the central portion M is increased. The intervals up to are formed almost equally. That is, the lower part is convex to the outside like a jar and the upper part is bent as the diameter decreases, and the candle-shaped flame generated between the inner and outer water pipe walls escapes to the upper part. At this time, the radiant heat of the flame fired in all directions warms the large surface area enclosed up and down, and the convective heat carried in the flame passes through the central and upper bent portions and comes into contact with more water pipes to increase heat transfer to the water pipes. Can be.

그리고, 외부수관벽(10)에는 원주 방향 및 길이방향을 따라 소정의 간격을 두고 다수개의 연료분사노즐(16)이 배치된다. 연료 분사노즐에서 분사된 연료는 외부수관벽(10)과 내부수관벽(20) 사이에 형성되는 연소공간(S) 속에 분사되어 거대한 하나의 곡선형 관형화염(F)을 형성하여 내외부수관벽(20, 10)의 내부에 흐르는 물을 가열시킨다.In addition, a plurality of fuel injection nozzles 16 are disposed in the outer water pipe wall 10 at predetermined intervals along the circumferential direction and the longitudinal direction. The fuel injected from the fuel injection nozzle is injected into the combustion space S formed between the outer water pipe wall 10 and the inner water pipe wall 20 to form a huge curved tubular flame (F) to form the inner and outer water pipe walls ( 20, 10) the water flowing inside is heated.

도 5에 도시한 바와, 내부수관벽(20)의 멤브레인에는 다수개의 공기분사구멍(26)이 형성된다. 공기분사구멍(26)은 내부수관벽(20)의 내부 공간과 연결된 공기 펌프에서부터 공급되어 공기를 내부수관벽(20)과 외부수관벽(10) 사이로 분사 주입하여 연료가 연소하면서 생성되는 화염(F)의 온도를 낮추어 초고온으로 가열되는 것을 방지해 주는 기능을 담당한다.As shown in FIG. 5, a plurality of air injection holes 26 are formed in the membrane of the inner water pipe wall 20. The air injection hole 26 is supplied from an air pump connected to the inner space of the inner water pipe wall 20 to inject air between the inner water pipe wall 20 and the outer water pipe wall 10 to generate a flame generated by burning fuel. It lowers the temperature of F) and prevents heating to ultra high temperature.

이러한 구조로 이루어진 본 발명의 발전소용 보일러 노의 작동상태를 설명하면 다음과 같다.Referring to the operating state of the boiler furnace for a power plant of the present invention made of such a structure as follows.

먼저, 모든 수관에 물을 채우고, 오일버너 등으로 화염을 분사하여 노(1) 내부를 가열한 후, 오일 버너의 화염 속에 외부수관벽(10)에 설치된 다수개의 연료분사노즐(16)을 통하여 공기와 함께 분사하거나 또는 하부로 미분탄을 분사하면 상기 노(1)가 오일 버너의 화염에 의해 더워진 상태이기 때문에 오일 버너의 화염에 의해 미분탄이 착화되어지게 되는데, 이렇게 미분탄이 연소되기 시작하면 오일버너를 끈다.First, all the water pipes are filled with water, the flame is sprayed with an oil burner or the like to heat the inside of the furnace 1, and then, through the plurality of fuel injection nozzles 16 installed in the outer water pipe wall 10 in the flame of the oil burner. When the pulverized coal is injected together with the air or the pulverized coal is lowered, the pulverized coal is ignited by the flame of the oil burner because the furnace 1 is warmed by the flame of the oil burner. Turn off the burner.

미분탄 화염(F)이 성장하여 격렬하게 요동하면, 중앙의 내부수관벽(20)의 연결판(10d)에 형성되어 있는 공기분사구멍(26)에서 보조 공기가 분사되어 내부수관벽(20)과 외부수관벽(10)사이에 형성되는 연소공간(S)속으로 주입된다.When the pulverized coal flame F grows and vibrates violently, auxiliary air is injected from the air injection hole 26 formed in the connecting plate 10d of the inner inner water pipe wall 20 to the inner water pipe wall 20. It is injected into the combustion space (S) formed between the outer water pipe wall (10).

한편, 상기 외부수관벽(10)에 설치되어 있는 연료분사노즐(16)은 내부수관벽(20)의 외접선 방향으로 배치되어, 상기 연료분사노즐(16)에서 분사되는 연료가 연소될 때 발생하는 화염(F)이 내부수관벽(20)에 부딪친 후 반사되다가 다시 외부수관벽에 부딪쳐 갇히면서 관형 화염(fire pipe)을 이루게 된다.On the other hand, the fuel injection nozzle 16 provided in the outer water pipe wall 10 is disposed in the tangential direction of the inner water pipe wall 20, which is generated when the fuel injected from the fuel injection nozzle 16 is burned. After the flame (F) hits the inner water pipe wall 20, it is reflected and then hits the outer water pipe wall to be trapped to form a tubular fire (fire pipe).

따라서, 상기 화염(F)은 내외부수관벽(10,6) 사이의 연소공간(S) 속에서 내부수관벽(20)의 접선 방향을 따라 회전하게 되므로, 각각의 연료분사노즐(16)에서 분사되어 나오는 화염이 한 곳에 집중되는 현상이 발생하지 않으므로 화염(F)의 온도가 질소가 산화될 정도의 온도로 가열되지 않게 될 뿐만 아니라, 필요시 내부수관벽(20)의 공기분사구멍(26)에서 외부의 찬 공기가 주입되면서 화염(F)의 온도를 낮추어주기 때문에, 상기 연소공간(S)에서 연소되는 화염(F)이 1300℃의 초고온으로 올라가지 않게 된다.Therefore, the flame (F) is rotated along the tangential direction of the inner water pipe wall 20 in the combustion space (S) between the inner and outer water pipe walls (10, 6), injection from each fuel injection nozzle (16) Since the flame is not concentrated in one place, the temperature of the flame F is not heated to a temperature at which nitrogen is oxidized, and if necessary, the air injection hole 26 of the inner water pipe wall 20 is used. In order to lower the temperature of the flame (F) while the external cold air is injected, the flame (F) burned in the combustion space (S) does not rise to an ultra-high temperature of 1300 ℃.

또한, 화염의 상부쪽은 폭이 좁아지더라도 내외부수관벽의 거리가 좁은 중간부분에 접촉하여 복사열의 흡수면적을 넓힐 수 있게 되며, 화염에서 발생된 대류열을 지닌 대류가스도 중앙부위와 상부쪽의 굴곡부위를 통과하면서 수관들과 더 많이 접촉하게 하여 열효율을 높일 수 있다.In addition, even if the upper part of the flame becomes narrower, the inner and outer water pipe walls can reach a narrower middle part to increase the absorption area of the radiant heat, and the convective gas with convective heat generated from the flame is also central and upper part. The thermal efficiency can be increased by making more contact with the water pipes while passing through the bent portion of.

그러므로, 본 발명에 따른 보일러 노는 내,외부 수관벽의 연소공간을 화염의 모양과 가장 근접하게 형성하여 전열효과가 상승되게 되며, 화염으로부터 초고온의 화염에 의해 공기중의 질소가 산화되는 현상으로 인해 질소산화물이 발생하는 문제가 야기 되지 않는 것이다.Therefore, the boiler furnace according to the present invention forms the combustion space of the inner and outer water pipe walls closest to the shape of the flame to increase the heat transfer effect, and due to the phenomenon that the nitrogen in the air is oxidized by the super high temperature flame from the flame. Nitrogen oxides are not a problem.

본 발명은 미분탄 보일러 뿐만 아니라 다른 보일러에도 적용할 수 있다는 것은 이 분야에 종사하는 사람이면 쉽게 알 수 있다.It can be easily understood by those skilled in the art that the present invention can be applied not only to pulverized coal boilers but also to other boilers.

도 1은 종래의 발전소용 보일러의 노에 대한 부분 절개 사시도.1 is a partial cutaway perspective view of a furnace of a conventional boiler for a power plant.

도 2는 본 발명의 실시예에 따른 발전소용 보일러 노에 대한 부분 절개 사시도.2 is a partial cutaway perspective view of a boiler furnace for a power plant according to an embodiment of the present invention.

도 3은 본 발명의 실시예에 따른 발전소용 보일러 노의 단면도.3 is a sectional view of a boiler furnace for a power plant according to an embodiment of the present invention.

도 4는 본 발명의 실시예에 따른 발전소용 보일러의 연소실에 설치된 내외부 수관벽의 배치상태를 나타낸 평단면도.Figure 4 is a plan sectional view showing the arrangement of the inner and outer water pipe walls installed in the combustion chamber of the power plant boiler according to an embodiment of the present invention.

도 5는 본 발명의 실시예에 따른 발전소용 보일러의 연소실에 설치되는 내부수관벽에 형성되는 공기분사구멍의 수직 단면도.Figure 5 is a vertical cross-sectional view of the air injection hole formed in the inner water pipe wall is installed in the combustion chamber of the power plant boiler according to an embodiment of the present invention.

<도면의 주요부분에 대한 부호설명><Code Description of Main Parts of Drawing>

10 : 외부수관벽 12 : 제1하부헤드10: external water pipe wall 12: first lower head

14 : 제1상부헤드 20 : 내부수관벽14: first upper head 20: internal water pipe wall

16 : 연료분사노즐 22 : 제2하부헤드16 fuel injection nozzle 22 second lower head

24 : 제2상부헤드 26 : 공기분사구멍24: second upper head 26: air injection hole

Claims (2)

내부 가장자리에 노벽(2)을 따라 단열재를 사이에 두고 설치되는 다수개의 수관이 연결되어 이루어진 외부수관벽(10)과, 상기 외부수관벽(10)의 내측에 위치하면서 역시 다수개의 수관이 연결되어 이루는 내부수관벽(20)으로 이루어진 통상의 발전소용 보일러 노에 있어서, An outer water pipe wall 10 formed by connecting a plurality of water pipes installed with an insulating material interposed along the furnace wall 2 at an inner edge thereof is also located inside the outer water pipe wall 10, and a plurality of water pipes are also connected. In a conventional boiler furnace for a power plant consisting of an inner water pipe wall (20), 아래쪽에서 중앙부위(M)까지의 상기 외부수관벽(10)은 직경이 더 넓어지거나 또는 동일한 형상으로 이루어지고, 상기 내부수관벽(20)은 외부수관벽(10)을 기준으로 아래쪽의 직경이 점점 좁아지다가 넓어지는 형상으로 이루어지며, The outer water pipe wall 10 from the bottom to the central portion (M) is wider in diameter or made of the same shape, the inner water pipe wall 20 has a diameter of the lower side relative to the outer water pipe wall (10) It becomes narrower and wider, 중앙부위(M)에서 상부쪽까지의 상기 외부수관벽(10)은 직경이 좁아지다가 다시 넓어지는 형상으로 이루어지고, 상기 내부수관벽(20)은 상기 외부수관벽에 평행하게 직경이 좁아지다가 다시 넓어지는 형상으로 이루어져, 내외부수관벽의 폭이 일정하게 유지되면서 굴곡진 것을 특징으로 하는 발전소용 보일러 노.The outer water pipe wall 10 from the central portion (M) to the upper side is formed in a shape where the diameter is narrowed and then widened again, and the inner water pipe wall 20 is narrowed in parallel to the outer water pipe wall and then again. Boiler furnace for power plants, characterized in that the shape is widened, curved while maintaining the width of the inner and outer water pipe wall is constant. 삭제delete
KR1020080093201A 2008-09-23 2008-09-23 Furnace of boiler for power station KR101039409B1 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
KR1020080093201A KR101039409B1 (en) 2008-09-23 2008-09-23 Furnace of boiler for power station
CN201410218765.2A CN104048285B (en) 2008-09-23 2009-09-21 Boiler furnace for electric station
AU2009297366A AU2009297366B2 (en) 2008-09-23 2009-09-21 Boiler furnace for a power station
PCT/KR2009/005348 WO2010035992A2 (en) 2008-09-23 2009-09-21 Boiler furnace for a power station
CN200980132078.6A CN102124266B (en) 2008-09-23 2009-09-21 Boiler furnace for a power station
JP2011514507A JP5198658B2 (en) 2008-09-23 2009-09-21 Boiler furnace for power plant
RU2010151865/06A RU2470224C2 (en) 2008-09-23 2009-09-21 Boiler furnace of power plant (versions)
US12/565,569 US8707912B2 (en) 2008-09-23 2009-09-23 Furnace of boiler for power station
JP2012233110A JP5410590B2 (en) 2008-09-23 2012-10-22 Boiler furnace for power plant

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5963449A (en) 1982-10-05 1984-04-11 Bunka Buro Sangyo Kk Oil-burning bath boiler both for bathtub heating and hot-water supplying
JPH0630603U (en) * 1992-09-09 1994-04-22 石川島播磨重工業株式会社 Multi-tube once-through boiler
KR200257645Y1 (en) 2001-08-28 2001-12-24 대림로얄보일러 주식회사 Industry a boiler make use of fruit oil seeds remain of heat use equipment
KR20020057645A (en) * 2001-01-03 2002-07-12 박찬구 Organic montmorillonite and thermoplastic elastomer nanocomposites including it
KR100764903B1 (en) * 2004-09-07 2007-10-09 김병두 Construction of a furnace of a pulverized coal boiler for power station

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5963449A (en) 1982-10-05 1984-04-11 Bunka Buro Sangyo Kk Oil-burning bath boiler both for bathtub heating and hot-water supplying
JPH0630603U (en) * 1992-09-09 1994-04-22 石川島播磨重工業株式会社 Multi-tube once-through boiler
KR20020057645A (en) * 2001-01-03 2002-07-12 박찬구 Organic montmorillonite and thermoplastic elastomer nanocomposites including it
KR200257645Y1 (en) 2001-08-28 2001-12-24 대림로얄보일러 주식회사 Industry a boiler make use of fruit oil seeds remain of heat use equipment
KR100764903B1 (en) * 2004-09-07 2007-10-09 김병두 Construction of a furnace of a pulverized coal boiler for power station

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