WO2009143725A1 - 内燃式点火煤粉燃烧器 - Google Patents

内燃式点火煤粉燃烧器 Download PDF

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Publication number
WO2009143725A1
WO2009143725A1 PCT/CN2009/071216 CN2009071216W WO2009143725A1 WO 2009143725 A1 WO2009143725 A1 WO 2009143725A1 CN 2009071216 W CN2009071216 W CN 2009071216W WO 2009143725 A1 WO2009143725 A1 WO 2009143725A1
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WIPO (PCT)
Prior art keywords
pulverized coal
combustion chamber
reinforced
concentrator
wall
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Application number
PCT/CN2009/071216
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English (en)
French (fr)
Inventor
王文举
王爱生
任国宏
高克迎
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徐州燃烧控制研究院有限公司
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Publication of WO2009143725A1 publication Critical patent/WO2009143725A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D1/00—Burners for combustion of pulverulent fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C3/00—Combustion apparatus characterised by the shape of the combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
    • F23C2900/03005—Burners with an internal combustion chamber, e.g. for obtaining an increased heat release, a high speed jet flame or being used for starting the combustion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2201/00—Burners adapted for particulate solid or pulverulent fuels
    • F23D2201/20—Fuel flow guiding devices

Definitions

  • the invention relates to an internal combustion type pulverized coal burner, and is particularly suitable for a boiler with pulverized coal as fuel. Background technique
  • the general ignition mode of the power plant pulverized coal boiler is: First, use the ignition device to point the fuel burner (commonly known as the oil gun, the single oil gun output is 0.8 ⁇ 5t/h) for temperature rise and boost, when the relevant parameters of the boiler are reached.
  • the fuel burner commonly known as the oil gun, the single oil gun output is 0.8 ⁇ 5t/h
  • the milling system and the pulverized coal burner are started to realize the operation with load.
  • the boiler load is reduced to about 50%, the oil must be stabilized to ensure the normal operation of the boiler.
  • a 300MW thermal power unit pulverized coal boiler will use about 100t of oil for cold start. When peaking, it is necessary to start fuel injection and fuel injection. The annual start-up, shutdown, steady combustion and combustion support of power station boilers consume a large amount of oil resources. Summary of the invention
  • the object of the present invention is to overcome the deficiencies in the prior art, and to provide an internal combustion type pulverized coal burner with simple structure, various structures, good ignition effect and fuel saving.
  • the pulverized coal burner of the present invention comprises a primary air duct connected to the pulverized coal reinforced combustion chamber, a high-intensity ignition heat source and a reinforced combustion chamber, and the high-intensity ignition heat source is inserted obliquely or horizontally into the pulverized coal.
  • an annular concentrator is arranged at the inlet of the pulverized coal reinforced combustion chamber, and a dog-shaped concentrator is arranged in the reinforced combustion chamber.
  • the pulverized coal reinforced combustion chamber is provided with a secondary combustion chamber and a tertiary combustion chamber in sequence; the pulverized coal reinforced combustion chamber is provided with a gas film duct, and the pulverized coal reinforced combustion chamber is provided with a gas film on the inner cylinder wall a wind window; the pulverized coal reinforced combustor tube wall is provided with a gas film duct, and the pulverized coal reinforced combustion chamber is provided with a heat dissipating rib on the inner cylinder wall; the pulverized coal reinforced the inner cylinder wall of the combustion chamber A heat dissipating rib is arranged, and a light phase air film air passage connected to the air inlet of the annular concentrator is left between the inner cylinder wall and the outer cylinder wall.
  • the pulverized coal burner of the present invention uses a high-intensity ignition heat source to heat the primary air powder passing through the pulverized coal burner to the ignition temperature of the pulverized coal inside the pulverized coal burner, so that the volatile powder in the pulverized coal is rapidly precipitated and burned. At the same time, the carbon particles are ignited to form a high temperature torch, which is injected into the furnace.
  • the internal combustion type ignited pulverized coal burner with the corresponding output is configured to use the ignition pulverized coal burner or the ignited pulverized coal burner as the main burner to burn the pulverized coal instead of the fuel, which can complete the boiler ignition and stable combustion work.
  • the internal combustion type ignited pulverized coal burner with the corresponding output is configured to use the ignition pulverized coal burner or the ignited pulverized coal burner as the main burner to burn the pulverized coal instead of the fuel, which can complete the boiler ignition and stable combustion work.
  • the utility model has the advantages of simple and diverse structure, good ignition effect, suitable for multi-coal type, multi-furnace type, ensuring no slagging of the combustion chamber, no ablation, anti-wear, reliable operation, low investment, low operating cost and wide applicability.
  • FIG. 1 is a structural view (an oblique insertion type) of a pulverized coal reinforced combustion chamber of a staged combustion structure of the present invention.
  • Fig. 2 is a structural view (shaft insertion type) of the pulverized coal reinforced combustion chamber of the hierarchical combustion structure of the invention.
  • Fig. 3 is a structural view (inclined insertion type) of the pulverized coal reinforced combustion chamber of the invention for the inner film wind protection structure.
  • Fig. 4 is a structural view (shaft insertion type) of the pulverized coal reinforced combustion chamber of the invention for the inner film wind protection structure.
  • Fig. 5 is a structural view (inclined insertion type) of the pulverized coal reinforced combustion chamber of the external air film wind protection structure of the invention.
  • Fig. 6 is a structural view (shaft insertion type) of the pulverized coal reinforced combustion chamber of the external air film wind protection structure of the invention.
  • Fig. 7 is a structural view (inclined insertion type) of the pulverized coal reinforced combustion chamber of the invention for the light phase gas film wind protection structure.
  • Fig. 8 is a structural view (shaft insertion type) of the pulverized coal reinforced combustion chamber of the invention for the light phase gas film wind protection structure. Description of the symbols
  • Embodiment 1 and FIG. 1 show a hierarchical combustion structure: a straight tubular first air duct 1 is fastened to a pulverized coal reinforced combustion chamber bolt, and an annular concentrator 2 is provided at the entrance of the pulverized coal reinforced combustion chamber, and the annular concentrator 2 The middle part is contracted, and both ends are flared.
  • the inlet of the annular concentrator 2 is connected with an enhanced combustion chamber 4, and the enhanced combustion chamber 4 is provided with a dog-shaped concentrator 8; the outer wall of the pulverized coal-enhanced combustion chamber is provided with a high-intensity ignition heat source obliquely inserted into the enhanced combustion chamber 4.
  • the rear portion of the enhanced combustion chamber 4 is connected to the secondary combustion chamber 5 and the tertiary combustion chamber 6 in this order.
  • High-intensity ignition heat source 3 can be used: 1 oil burner, 2 gas burner, 3 plasma generator, 4 high temperature air.
  • Embodiment 2 FIG. 2, the staged combustion structure: the bent pipe-shaped primary air passage 1 is fastened to the pulverized coal-enhanced combustion chamber bolt, and the annular concentrator 2 is provided at the entrance of the pulverized coal-enhanced combustion chamber, and the annular concentrator 2
  • the inlet is connected with an enhanced combustion chamber 4, and the enhanced combustion chamber 4 is provided with a dog-shaped concentrator 8;
  • the outer wall of the curved-shaped primary air passage 1 is provided with a high-intensity ignition heat source axially inserted into the enhanced combustion chamber 4 3;
  • the rear portion of the enhanced combustion chamber 4 is provided with a secondary combustion chamber 5 and a tertiary combustion chamber 6 in this order.
  • Embodiment 3, FIG. 3, the inner air film wind protection structure the straight tubular first air passage 1 is fastened with the pulverized coal reinforced combustion chamber bolt, and the annular concentrator 2 is provided at the entrance of the pulverized coal reinforced combustion chamber, and the ring
  • the inlet of the concentrator 2 is connected with a reinforced combustion chamber 4, and the reinforced pulverizer 4 is provided with a dog-shaped concentrator 8;
  • the outer wall of the pulverized coal reinforced combustion chamber is provided with a high-intensity ignition heat source obliquely inserted into the annular concentrator 2 a plurality of gas film wind windows 9 are arranged on the inner tube wall of the enhanced combustion chamber 4 on the outer side of the dog tooth concentrator 8.
  • the outer wall of the pulverized coal reinforced combustion chamber is provided with oblique insertion into the tube wall and enhanced combustion.
  • the air film duct 7 passing through the air film wind window 9 of the chamber 4 passes through the air film wind window into the pulverized coal burner to form a complete gas film protective layer on the inner wall of the pulverized coal burner; the inner film wind protection structure
  • the pulverized coal reinforced combustion chamber adopts a method in which the pulverized coal is heated by heating as a whole.
  • Embodiment 4, FIG. 4, the inner air film wind protection structure the bent air duct 1 is connected with the pulverized coal reinforced combustion chamber bolt, and the annular concentrator 2 is arranged at the entrance of the pulverized coal reinforced combustion chamber, and the ring
  • the inlet of the concentrator 2 is connected with a reinforced combustion chamber 4, and the reinforced concentrator 4 is provided with a dog-shaped concentrator 8;
  • the outer wall of the curved-shaped primary air passage 1 is provided with an axially straight insertion into the reinforced combustion chamber 4 Intensity ignition heat source 3;
  • a plurality of gas film wind windows 9 are arranged on the inner tube wall of the enhanced combustion chamber 4 on the outer side of the dog tooth concentrator 8, and the outer wall of the pulverized coal reinforced combustion chamber is provided with oblique insertion into the pipe wall
  • the gas film duct 7 that passes through the gas film wind window 9 of the enhanced combustion chamber 4.
  • the inlet of the concentrator 2 is connected with a reinforced combustion chamber 4, and the reinforced pulverizer 4 is provided with a dog-shaped concentrator 8;
  • the outer wall of the pulverized coal reinforced combustion chamber is provided with a high-intensity ignition heat source obliquely inserted into the annular concentrator 2
  • a plurality of heat dissipating ribs 10 are arranged at intervals on the wall of the enhanced combustor 4 located outside the dog-shaped concentrator 8.
  • the pulverized coal reinforced combustion chamber of the outer film wind adopts the method of heating and igniting the pulverized coal as a whole.
  • the outer air film wind protection structure the curved air duct 1 is connected with the pulverized coal reinforced combustion chamber bolt, and the annular concentrator 2 is arranged at the entrance of the pulverized coal reinforced combustion chamber.
  • the inlet of the concentrator 2 is connected with a reinforced combustion chamber 4, and the reinforced concentrator 4 is provided with a dog-shaped concentrator 8; the outer wall of the curved-shaped primary air passage 1 is provided with an axially straight insertion into the reinforced combustion chamber 4
  • the intensity ignition heat source 3; a plurality of heat dissipation ribs 10 are arranged at intervals on the wall of the enhanced combustion chamber 4 located outside the dog-shaped concentrator 8.
  • Embodiment 7 and FIG. 7 show a light-phase gas film wind structure: a straight pipe-shaped primary air passage 1 is fastened to a bolt of a pulverized coal-enhanced combustion chamber, and an annular concentrator 2 is provided at an inlet of the pulverized coal-enhanced combustion chamber.
  • the inlet of the concentrator 2 is connected with a reinforced combustion chamber 4, and the nozzle of the annular concentrator 2 is larger than the nozzle of the reinforced combustion chamber 4, so that a light phase gas film air passage 11 is formed between the tube wall of the combustion chamber 4 and the pulverized coal reinforced combustion chamber.
  • the enhanced combustion chamber 4 is provided with a dog-shaped concentrator 8; the outer wall of the pulverized coal-enhanced combustion chamber is provided with a high-intensity ignition heat source 3 obliquely inserted into the enhanced combustion chamber 4, and the enhanced combustion chamber 4 is located in the dog-toothed type
  • a plurality of heat dissipating ribs 10 are arranged on the wall of the concentrator 8 at intervals. The primary air is separated by concentration. When igniting, the high-intensity point heat source is used to ignite the dense phase coal powder, and the low-phase primary air is used to cool the pulverized coal burner.
  • Embodiment 8 and FIG. 8 show a light-phase gas film wind structure: a bent pipe-shaped primary air passage 1 is fastened to a bolt of a pulverized coal-enhanced combustion chamber, and an annular concentrator 2 is provided at an entrance of the pulverized coal-enhanced combustion chamber.
  • the inlet of the concentrator 2 is connected with a reinforced combustion chamber 4, and the nozzle of the annular concentrator 2 is larger than the nozzle of the reinforced combustion chamber 4, so that a light phase gas film air passage 11 is formed between the tube wall of the combustion chamber 4 and the pulverized coal reinforced combustion chamber.
  • the enhanced combustion chamber 4 is provided with a dog-shaped concentrator 8; the outer wall of the curved-shaped primary air passage 1 is provided with a high-intensity ignition heat source 3 which is axially inserted into the enhanced combustion chamber 4; A plurality of heat dissipating ribs 10 are arranged at intervals on the wall of the dog-shaped concentrator 8.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)

Description

内燃式点火煤粉燃烧器 技术领域
本发明涉及内燃式点火煤粉燃烧器， 尤其适用于以煤粉为燃料的锅炉。 背景技术
目前电站煤粉锅炉启动时通用的点火方式是： 先用点火装置点燃油燃烧 器 （俗称油枪， 单只油枪出力为 0.8〜5t/h) 进行升温、 升压， 当锅炉各相关 参数达到投粉要求时， 启动制粉系统和煤粉燃烧器， 实现带负荷运行； 当锅 炉负荷降低到 50 %左右时， 还须投油稳燃才能保证锅炉正常运行。 一台 300MW火电机组煤粉锅炉， 冷态启动一次用油约 100t， 调峰时， 还需启动油 枪喷油助燃。 每年电站锅炉的启炉、 停炉、 稳燃及助燃需消耗掉大量的油资 源。 发明内容
本发明的目的是克服已有技术中的不足之处， 提供一种结构简单、 多样， 点火效果好， 节省燃油的内燃式点火煤粉燃烧器。
为实现上述目的， 本发明的煤粉燃烧器， 包括与煤粉强化燃烧室相连的 一次风管,高强度点火热源和强化燃烧室， 所述的高强度点火热源倾斜或水平 轴向插入煤粉强化燃烧室内， 煤粉强化燃烧室的入口处设有环形浓缩器， 所 述的强化燃烧室内设有狗牙式浓缩器。
所述煤粉强化燃烧室内依次设有二级燃烧室和三级燃烧室； 所述的煤粉 强化燃烧室上设有气膜风管， 煤粉强化燃烧室的内筒壁上设有气膜风窗口； 所述的煤粉强化燃烧室筒壁上设有气膜风管， 煤粉强化燃烧室的内筒壁上设 有散热筋片； 所述的煤粉强化燃烧室的内筒壁上设有散热筋片， 内筒壁与外 筒壁之间留有与环形浓缩器进风口相连的淡相气膜风通道。
本发明的煤粉燃烧器， 利用高强度点火热源， 在煤粉燃烧器内部将通过 煤粉燃烧器的一次风粉加热到煤粉的着火温度， 使煤粉中的挥发粉迅速析出 并燃烧， 同时将炭粒引燃， 形成高温火炬， 喷射进入炉膛。 根据不同煤种的 着火温度不同， 匹配不同结构的煤粉强化燃烧室和不同能量的高强度点火热 源， 实现将不同的煤粉加热至其着火温度， 即实现对烟煤、 褐煤、 贫煤、 无 烟煤、 混煤的点燃， 同时实现对燃烧器的保护。 与已有技术相比， 该内燃式 点火煤粉燃烧器的出力可达到 2〜20t/h。根据锅炉容量的大小， 配置相应出力 的本内燃式点火煤粉燃烧器， 利用点火煤粉燃烧器或点火煤粉燃烧器兼做主 燃烧器燃烧煤粉来代替燃油， 可完成锅炉点火和稳燃工作， 从而达到锅炉启 炉、 停炉、 助燃、 稳燃时少投油这一节约和替代燃料油的目的。 经过测试， 该内燃式点火煤粉燃烧器煤粉燃烬率达到 85%以上， 节油率大于 90 %， 壁温 一般可以稳定地控制在 700°C以下， 最高不超过 750°C， 可以保证燃烧器的安 全； 投入运行后原主燃烧器的性能基本得到保证， 未发现超温、 结渣、 燃烧 不良等现象， 应用于锅炉启动时点燃煤粉效果较好。 其结构简单、 多样， 点 火效果好， 适应于多煤种、 多炉型、 保证燃烧室不结渣、 不烧蚀、 抗磨损、 运行可靠， 投资少、 运行费用低， 具有广泛的适用性。 附图说明
图 1是本发明的分级燃烧结构煤粉强化燃烧室结构图 （斜插式）。
图 2是发明的分级燃烧结构煤粉强化燃烧室结构图 （轴插式）。
图 3是发明的内气膜风保护结构煤粉强化燃烧室结构图 （斜插式）。 图 4是发明的内气膜风保护结构煤粉强化燃烧室结构图 （轴插式）。 图 5是发明的外气膜风保护结构煤粉强化燃烧室结构图 （斜插式）。 图 6是发明的外气膜风保护结构煤粉强化燃烧室结构图 （轴插式）。 图 7是发明的淡相气膜风保护结构煤粉强化燃烧室结构图 （斜插式）。 图 8是发明的淡相气膜风保护结构煤粉强化燃烧室结构图 （轴插式）。 附图符号说明
1 一次风道 2 环形浓缩器
3 高强度点火热源 4 强化燃烧室
5 二级燃烧室 6 三级燃烧室
7 气膜风管 8 狗牙式浓缩器
9 气膜风窗口 10 散热翅片
11 淡相气膜风通道 具体实施方式：
下面结合附图中的实施例对本发明作进一步的描述：
实施例一、 图 1所示， 分级燃烧结构： 直管形一次风道 1与煤粉强化燃 烧室螺栓紧固连接， 煤粉强化燃烧室的入口处设有环形浓缩器 2， 环形浓缩器 2中部收缩， 两端呈喇叭状。 环形浓缩器 2入口相连有强化燃烧室 4， 强化燃 烧室 4内设有狗牙式浓缩器 8;煤粉强化燃烧室的外壁上设有斜插伸入强化燃 烧室 4内的高强度点火热源 3，强化燃烧室 4的后部依次连有二级燃烧室 5和 三级燃烧室 6。 高强度点火热源 3可采用： ①燃油燃烧器、 ②燃气燃烧器、 ③ 等离子发生器、 ④高温空气。
实施例二、 图 2所示， 分级燃烧结构： 弯管形一次风道 1与煤粉强化燃 烧室螺栓紧固连接， 煤粉强化燃烧室的入口处设有环形浓缩器 2， 环形浓缩器 2入口相连有强化燃烧室 4， 强化燃烧室 4内设有狗牙式浓缩器 8; 弯管形一 次风道 1的外壁上设有轴向直插伸入强化燃烧室 4内的高强度点火热源 3 ;强 化燃烧室 4的后部依次设有二级燃烧室 5和三级燃烧室 6。
实施例三、 图 3所示， 内气膜风保护结构： 直管形一次风道 1与煤粉强 化燃烧室螺栓紧固连接， 煤粉强化燃烧室的入口处设有环形浓缩器 2， 环形浓 缩器 2入口相连有强化燃烧室 4， 强化燃烧室 4内设有狗牙式浓缩器 8; 煤粉 强化燃烧室的外壁上设有斜插伸入环形浓缩器 2内的高强度点火热源 3，强化 燃烧室 4 内位于狗牙式浓缩器 8外侧的内管壁上间隔排列有多个气膜风窗口 9， 煤粉强化燃烧室的外壁上设有斜插伸入管壁内与强化燃烧室 4的气膜风窗 口 9相通过的气膜风管 7， 通过气膜风窗口通入煤粉燃烧器内部， 在煤粉燃烧 器内壁形成完整的气膜保护层； 内气膜风保护结构的煤粉强化燃烧室采取煤 粉整体加热升温点燃的方式。
实施例四、 图 4所示， 内气膜风保护结构： 弯管形一次风道 1与煤粉强 化燃烧室螺栓紧固连接， 煤粉强化燃烧室的入口处设有环形浓缩器 2， 环形浓 缩器 2入口相连有强化燃烧室 4， 强化燃烧室 4内设有狗牙式浓缩器 8; 弯管 形一次风道 1 的外壁上设有轴向直插伸入强化燃烧室 4 内的高强度点火热源 3； 强化燃烧室 4内位于狗牙式浓缩器 8外侧的内管壁上间隔排列有多个气膜 风窗口 9，煤粉强化燃烧室的外壁上设有斜插伸入管壁内与强化燃烧室 4的气 膜风窗口 9相通过的气膜风管 7。
实施例五、 图 5所示， 外气膜风保护结构： 直管形一次风道 1与煤粉强 化燃烧室螺栓紧固连接， 煤粉强化燃烧室的入口处设有环形浓缩器 2， 环形浓 缩器 2入口相连有强化燃烧室 4， 强化燃烧室 4内设有狗牙式浓缩器 8; 煤粉 强化燃烧室的外壁上设有斜插伸入环形浓缩器 2内的高强度点火热源 3，强化 燃烧室 4内位于狗牙式浓缩器 8外侧的管壁上间隔排列有多个散热筋片 10。 从外界引入保护风， 保护风沿燃烧器外壁贴壁行走， 进入炉膛， 对煤粉燃烧 器进行保护； 外气膜风的煤粉强化燃烧室采取煤粉整体加热升温点燃的方式。 实施例六、 图 6所示， 外气膜风保护结构： 弯管形一次风道 1与煤粉强 化燃烧室螺栓紧固连接， 煤粉强化燃烧室的入口处设有环形浓缩器 2， 环形浓 缩器 2入口相连有强化燃烧室 4， 强化燃烧室 4内设有狗牙式浓缩器 8; 弯管 形一次风道 1 的外壁上设有轴向直插伸入强化燃烧室 4 内的高强度点火热源 3； 强化燃烧室 4内位于狗牙式浓缩器 8外侧的管壁上间隔排列有多个散热筋 片 10。
实施例七、 图 7所示， 淡相气膜风结构： 直管形一次风道 1与煤粉强化 燃烧室螺栓紧固连接， 煤粉强化燃烧室的入口处设有环形浓缩器 2， 环形浓缩 器 2入口相连有强化燃烧室 4，环形浓缩器 2的管口大于强化燃烧室 4的管口， 使燃烧室 4的管壁与煤粉强化燃烧室之间形成淡相气膜风通道 11 ; 强化燃烧 室 4内设有狗牙式浓缩器 8;煤粉强化燃烧室的外壁上设有斜插伸入强化燃烧 室 4内的高强度点火热源 3，强化燃烧室 4内位于狗牙式浓缩器 8的管壁上间 隔排列有多个散热筋片 10。 对一次风进行浓淡分离， 点火时， 利用高强度点 火热源点燃浓相煤粉， 利用淡相一次风对煤粉燃烧器进行冷却保护。
实施例八、 图 8所示， 淡相气膜风结构： 弯管形一次风道 1与煤粉强化 燃烧室螺栓紧固连接， 煤粉强化燃烧室的入口处设有环形浓缩器 2， 环形浓缩 器 2入口相连有强化燃烧室 4，环形浓缩器 2的管口大于强化燃烧室 4的管口， 使燃烧室 4的管壁与煤粉强化燃烧室之间形成淡相气膜风通道 11 ; 强化燃烧 室 4内设有狗牙式浓缩器 8;弯管形一次风道 1的外壁上设有轴向直插伸入强 化燃烧室 4内的高强度点火热源 3 ;强化燃烧室 4内位于狗牙式浓缩器 8的管 壁上间隔排列有多个散热筋片 10。

Claims

权 利 要 求 书
1.内燃式点火煤粉燃烧器，它包括与煤粉强化燃烧室相连的一次风管（ 1 ) , 高强度点火热源 (1)和强化燃烧室 （4)， 其特征在于： 所述的高强度点火热源
(1M顷斜或水平轴向插入煤粉强化燃烧室内， 煤粉强化燃烧室的入口处设有环 形浓缩器 (2)， 所述的强化燃烧室 （4) 内设有狗牙式浓缩器 （8)。
2.根据权利要求 1所述的内燃式点火煤粉燃烧器， 其特征在于： 所述煤粉 强化燃烧室内依次设有二级燃烧室 （5 ) 和三级燃烧室 （6)。
3.根据权利要求 1所述的内燃式点火煤粉燃烧器， 其特征在于： 所述的煤 粉强化燃烧室上设有气膜风管 （7)， 煤粉强化燃烧室的内筒壁上设有气膜风 窗口 （9)。
4.根据权利要求 1所述的内燃式点火煤粉燃烧器， 其特征在于： 所述的煤 粉强化燃烧室筒壁上设有气膜风管 （7)， 煤粉强化燃烧室的内筒壁上设有散 热筋片 （10)。
5.根据权利要求 1所述的内燃式点火煤粉燃烧器， 其特征在于： 所述的煤 粉强化燃烧室的内筒壁上设有散热筋片 （10)， 内筒壁与外筒壁之间留有与环 形浓缩器 (2)进风口相连的淡相气膜风通道 （11 )。
PCT/CN2009/071216 2008-05-29 2009-04-10 内燃式点火煤粉燃烧器 WO2009143725A1 (zh)

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