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    Atomizer and coal-water slurry fired boiler utilizing the same
    3.
    发明公开
    Atomizer and coal-water slurry fired boiler utilizing the same 失效
    雾化器和配备水煤浆锅炉。

    公开(公告)号：EP0248539A1

    公开(公告)日：1987-12-09

    申请号：EP87304043.0

    申请日：1987-05-06

    申请人： HITACHI, LTD. ,  BABCOCK-HITACHI KABUSHIKI KAISHA

    发明人： Kobayashi, Hironobu ,  Azuhata, Shigeru ,  Narato, Kiyoshi ,  Inada, Tooru ,  Sohma, Kenichi ,  Miyadera, Hiroshi ,  Arashi, Norio ,  Takahashi, Yoshitaka

    IPC分类号： F23D11/10 ,  F23D1/00 ,  F23C7/00

    CPC分类号： F23C7/004 ,  B05B7/0466 ,  B05B7/08 ,  F22B31/00 ,  F23D1/005 ,  F23D11/102 ,  F23L15/04 ,  Y02E20/348

    摘要： An atomizer including a fuel supply passage (5,105,205, 305, 405, 505, 605, 707) for supplying a fuel, an atomizing medium supply passage (7, 107, 207, 307, 407, 507, 607, 705) for supplying an atomizing medium which is to be mixed with the fuel, a mixing chamber (15, 115, 215, 315, 415, 515, 615, 715) in communication with the fuel supply passage and the atomizing medium supply passage, and spray ports (13d, 113d, 213d, 313d, 413d, 513d, 613d, 713d) for spraying the fluid mixture consisting of the fuel and the atomizing medium from the mixing chamber. The fuel supply passage and the atomizing medium supply passages are communicated with the mixing chamber through a pre-mixing chamber (12, 112, 212, 312,412, 512, 612, 712j having an annular cross-section defined by a large-diameter cylindrical (12b, 112b, 212b, 312b, 412b, 512b, 612b, 712b) surface and a small-diameter cylindrical surface (12a, 112a, 212a, 312a, 412a, 512a, 612a, 712a). The fuel and the atomizing medium supplied from the fuel supply passage and the atomizing medium supply passage are pre-mixed the pre-mixing chamber. With this arrangement, it is possible to efficiently mix a slurry fuel and an atomizing medium, thus reducing the particle size of the atomized fuel particles and shortening the flame length. Thus, the atomizer of the invention is indispensable for the boilers which are intended for burning coal-water slurry. The invention makes it possible to form flames with reduced NOx generation and a high burning efficiency through combina- tion between atomizer of the construction described above and a burner having a specific construction.

    摘要翻译： 雾化器包括用于供给燃料到雾化介质供给通路（7，107，207，307，407，507，607燃料供给通道（5，105，205，305，405，505，605，707），705 ），用于雾化介质的所有这是与燃料，与燃料供应通道和雾化介质供给流路连通的混合室（15，115，215，315，415，515，615，715）被混合的供应，并 喷雾口（13D，113D，213D，313D，413D，513D，613d，713D），用于喷射流体加入由燃料和从混合室中的雾化介质的。 燃料供给通道和所述雾化介质供给流路是通过具有在由large-限定环形设计横截面的预混合腔室（12，112，212，312，412，512，612，712）连通于混合室 直径的圆柱形（12B，112B，212B，312B，412B，512B，612B，712B）表面和一个小直径圆柱形表面（12A，112A，212A，312A，412A，512A，612A，712A）。 燃料和从燃料供给通道和雾化介质供给通路供给的雾化介质是预混合的预混合室中。 利用这种布置，也能够有效地混合淤浆和燃料的雾化介质，这样可以减少雾化燃料颗粒的粒径和缩短火焰长度。

    Pulverized coal burner, pulverized coal boiler and method of burning pulverized coal
    7.
    发明公开
    Pulverized coal burner, pulverized coal boiler and method of burning pulverized coal 失效
    Kohlenstaubbrenner，Kohlenstaubkessel und Verfahren zum Verbrennen von Kohlenstaub。

    公开(公告)号：EP0445938A1

    公开(公告)日：1991-09-11

    申请号：EP91301441.1

    申请日：1991-02-22

    申请人： HITACHI, LTD. ,  BABCOCK-HITACHI KABUSHIKI KAISHA

    发明人： Kobayashi, Hironobu ,  Narato, Kiyoshi ,  Azuhata, Shigeru ,  Miyadera, Hiroshi ,  Morita, Shigeki ,  Jimbo, Tadashi ,  Hodozuka, Kunio ,  Baba, Akira

    IPC分类号： F23D1/04

    CPC分类号： C04B7/44 ,  F23D1/02 ,  F23D2201/20 ,  F23D2209/20 ,  F23K1/00

    摘要： A burner for pulverized coal has a coal duct (1) for pulverized coal and primary combustion air and a secondary combustion air duct (2) such that the coal and primary air and secondary air mix outside the outlet nozzles of the duct in a mixing zone at which combustion occurs. Coal distribution means (7) in the coal duct create, adjacent the outlet nozzle, at least one outer zone of flow spaced from the coal duct axis and at least one inner zone of flow nearer the coal duct axis. There are means (12) for slowing flow in the outer zone relative to the flow in the inner zone, prior to the mixing zone. To achieve good mixing, and promote NO x reduction, the coal concentration in the outer zone is higher than in the inner zone. The slowing means (12) may be radially inwardly projecting baffles.

    摘要翻译： 用于粉煤的燃烧器具有用于粉煤和一次燃烧空气的煤管（1）和二次燃烧空气通道（2），使得煤和一次空气和二次空气在混合区域的管道的出口喷嘴外部混合 发生燃烧。 煤通道中的煤分配装置（7）在出口喷嘴附近产生与煤管轴线间隔开的至少一个外部区域和至少一个更接近煤管轴线的流动内部区域的外部区域。 在混合区之前，存在用于减缓外部区域相对于内部区域中的流动的流动的装置（12）。 为了实现良好的混合，促进NOx还原，外区煤浓度高于内区煤浓度。 减速装置（12）可以是径向向内突出的挡板。

    Low NOx boiler
    8.
    发明公开
    Low NOx boiler 失效
    Kessel mit vermindertem NOx-Ausstoss。

    公开(公告)号：EP0376259A2

    公开(公告)日：1990-07-04

    申请号：EP89123973.3

    申请日：1989-12-27

    申请人： HITACHI, LTD. ,  BABCOCK-HITACHI KABUSHIKI KAISHA

    发明人： Kobayashi, Hironobu ,  Azuhata, Shigeru ,  Narato, Kiyoshi ,  Sohma, Kenichi ,  Yoshii, Yasuo ,  Arashi, Norio ,  Nishimoto, Shigekazu ,  Koyama, Isao ,  Inata, Toru ,  Kikuchi, Hideo ,  Murakami, Tadayoshi ,  Taniguchi, Masayuki ,  Miyadera, Hiroshi ,  Koda, Fumio ,  Enomoto, Tatsuzou ,  Kobayashi, Kenji

    IPC分类号： F23D14/02 ,  F23D23/00 ,  F22B31/00 ,  F22B21/34 ,  F22B35/00

    CPC分类号： F23D23/00 ,  F22B21/346 ,  F22B31/00

    摘要： A low-NOx boiler comprises a burner for burning gaseous fuel, heat transfer pipes (117) heating water by combustion heat of the burner to generate steam and having a passage (131) through which water flows, a steam drum (128) communicating with the heat transfer pipe and accumulating the steam from the heat transfer pipe, and an exhaust gas duct (114) located in the furnace to exhaust combustion gas generated by combustion of gaseous fuel outside of the boiler. The boiler further comprises unburnt gas burner (126) in the exhaust gas duct (114) for burning unburnt content in the combustion gas flowing in the duct. The unburnt gas burner includes a nozzle (2) for inject­ing premixture flow of fuel and combustion air and flame holding plate (1) located near the downstream side of the outlet of the nozzle to interrupt the premixture flow to form a circulating flow on downstream side of the flame holding plate. As gaseous fuel and air are mixed in advance and a flame is formed, the flame length can be shortened. Furthermore, the flame holding plate enables to reduce NOx generated. Unburnt gas burner pro`vided in the exhaust gas duct makes it possible to notably reduce the concentration of NOx discharged to the outside of the system.

    摘要翻译： 低NOx锅炉包括用于燃烧气体燃料的燃烧器，传热管（117）通过燃烧器的燃烧热量加热水以产生蒸汽并具有水流过的通道（131），蒸汽鼓（128）与 传热管和来自传热管的蒸汽积聚，并且位于炉中的排气管道（114）排出由锅炉外部的气体燃料燃烧产生的燃烧气体。 锅炉还包括废气管道（114）中的未燃气体燃烧器（126），用于燃烧在管道中流动的燃烧气体中的未燃烧物质。 未燃气体燃烧器包括用于喷射燃料和燃烧空气的预混合物流的喷嘴（2）和位于喷嘴出口下游侧附近的火焰保持板（1），以中断预混合流在下游侧形成循环流 的火焰保持板。 由于气体燃料和空气预先混合并形成火焰，因此可以缩短火焰长度。 此外，火焰保持板能够减少生成的NOx。 废气管道中的无燃气体燃烧器使得可以显着地降低排放到系统外部的NOx的浓度。

    Low NOx burner
    10.
    发明公开
    Low NOx burner 失效
    Brenner zur NOx-armen Verbrennung。

    公开(公告)号：EP0260382A1

    公开(公告)日：1988-03-23

    申请号：EP87107587.5

    申请日：1987-05-25

    申请人： HITACHI, LTD. ,  BABCOCK-HITACHI KABUSHIKI KAISHA

    发明人： Azuhata, Shigeru ,  Narato, Kiyoshi ,  Kobayashi, Hironobu ,  Sohma, Kenichi ,  Inada, Tooru ,  Arashi, Norio ,  Miyadera, Hiroshi ,  Masutani, Masao

    IPC分类号： F23D1/00 ,  F23C7/02

    CPC分类号： F23D1/02 ,  F23C7/004

    摘要： A low NOx burner comprises a pulverized coal nozzle (2) for injecting a flow of a mixture of pulverized coal with primary air, a secondary air nozzle (4) arranged externally of and coaxially with the pulverized coal nozzle (2), a tertiary air nozzle (6) arranged externally of the secondary air nozzle (4) and disposed coaxially with the pulverized coal nozzle (2), and a swirl flow generator (14, 12) for injecting secondary air and tertiary air as a respective swirl flow. Between the secondary air nozzle (4) and the tertiary air nozzle (6), there is provided a spacer (24) having such a thickness as to delay the mixing of the secondary air and the tertiary air and to form a swirl flow between the secondary air and the tertiary air.

    摘要翻译： 低NOx燃烧器包括：粉煤喷嘴（2），用于喷射粉煤与一次空气的混合物流;二次空气喷嘴（4），其布置在与粉煤喷嘴（2）的外部并同轴;三次空气 喷嘴（6），其布置在二次空气喷嘴（4）的外部并与粉煤喷嘴（2）同轴设置;以及涡流发生器（14,12），用于将二次空气和三次空气作为相应的涡流喷射。 在二次空气喷嘴（4）和三次空气喷嘴（6）之间设置有具有如下厚度的间隔件（24），以延迟二次空气和三次空气的混合，并在第二空气喷嘴 二次空气和三次空气。