Regenerative burner and regenerative heat exchange system applicable
thereto
    1.
    发明授权
    Regenerative burner and regenerative heat exchange system applicable thereto 失效
    再生燃烧器和再生热交换系统适用

    公开(公告)号:US5848885A

    公开(公告)日:1998-12-15

    申请号:US649677

    申请日:1996-05-22

    摘要: A regenerative heat exchange system performs heat exchange by alternately passing combustion exhaust gas as high-temperature fluid and combustion air as low-temperature fluid through a fixed regenerator. A regenerative burner carries out combustion using preheated air from the exchange system. The regenerative heat system comprises: a permeable regenerator partitioned into three or more chambers in the circumferential direction; a double-pipe outlet/inlet partitioned into a supply chamber and an exhaust chamber; and changeover member which isolates the regenerator from the outlet/inlet and by which the regenerator selectively communicates with the outlet/inlet by a supply communicating hole and an exhaust communicating hole which are provided with such a positional relation that the supply communicating hole and the exhaust communicating hole do not simultaneously lie in any of the partitioned chambers.

    摘要翻译: PCT No.PCT / JP94 / 02027 Sec。 371日期:1996年5月22日 102(e)日期1996年5月22日PCT 1994年12月1日PCT PCT。 出版物WO95 / 15462 日期:1995年6月8日再生热交换系统通过将作为高温流体的燃烧废气和作为低温流体的燃烧空气交替地通过固定再生器进行热交换。 蓄热式燃烧器使用来自交换系统的预热空气进行燃烧。 再生热系统包括:在圆周方向上分隔成三个或更多个室的可渗透再生器; 分隔成供应室和排气室的双管出口/入口; 以及转换构件,其将再生器与出口/入口隔离,再生器通过供应连通孔和排气连通孔选择性地与出口/入口连通,该供应连通孔和排气连通孔具有这样的位置关系:供应连通孔和排气 连通孔不同时位于任何分隔的室中。

    Low-NOx burner
    2.
    发明授权
    Low-NOx burner 失效
    低NOx燃烧器

    公开(公告)号:US5846067A

    公开(公告)日:1998-12-08

    申请号:US765950

    申请日:1997-01-15

    摘要: In combustion using air preheated by regenerative direct heat exchange between exhaust gas and the combustion air using a regenerator as a heat exchange medium, the present invention relates to a low-NOx burner that is effective for reduction in NOx in a mid-temperature range which has been conventionally difficult to be realized and improves stability of the flame. According to this low-NOx burner, at an outlet of an air throat 24 for flowing a full quantity of the combustion air is disposed a burner tile 22 having an enlarged diameter portion 23 thereof whose diameter is larger than that of the outlet, and a fuel nozzle 19 for injecting the fuel from the enlarged diameter portion 23 of the burner tile is also provided. Further, a flow of the combustion air injected from the air throat 24 produces a negative pressure at a secondary combustion chamber 25 surrounded by the enlarged diameter portion 23 of the burner tile around the air throat 24 to cause a strong furnace exhaust gas recycle to occur, and a flame holding area X1, a furnace exhaust gas recycle combustion area X2 and a slow combustion area X3 are formed.

    摘要翻译: PCT No.PCT / JP95 / 01418 Sec。 371日期1997年1月15日 102(e)1997年1月15日PCT PCT 1995年7月17日PCT公布。 公开号WO96 / 02793 日期1996年2月1日在使用通过再生器作为热交换介质的废气与燃烧空气之间的再生直接热交换预热的空气的燃烧中,本发明涉及一种低NOx燃烧器,其有效地减少 通常难以实现的中温范围,并提高火焰的稳定性。 根据这种低NOx燃烧器,在用于流动大量燃烧空气的空气喉部24的出口处设置有燃烧器瓦22,其燃烧器瓦22的直径大于其直径部分23,直径部分23的直径大于出口直径, 还提供了用于从燃烧器砖的扩大直径部分23喷射燃料的燃料喷嘴19。 此外,从空气喉部24喷射的燃烧空气的流动在由燃烧器砖的扩大直径部分23围绕的空气喉部24周围的二次燃烧室25处产生负压,以引起强烈的炉排气再循环 形成火焰保持区域X1,炉废气再循环燃烧区域X2和缓慢燃烧区域X3。

    Boiler with increased flame temperature and output
    3.
    发明授权
    Boiler with increased flame temperature and output 失效
    锅炉具有增加的火焰温度和输出

    公开(公告)号:US5626104A

    公开(公告)日:1997-05-06

    申请号:US544562

    申请日:1995-10-18

    摘要: A boiler is provided with a radiation heat transfer section in its combustion chamber, which has therein, at least one regenerative-heating burner system including a pair of burners each with a regenerative bed. The burners receive combustion air and exhaust combustion gas which passes through the regenerative beds. Combustion is alternately effected in one of the burners and combustion gas is passed into the other burner, and exhausted through the corresponding regenerative bed of this other burner. Surplus thermal energy which is not completely consumed in the radiation heat transfer section is recovered in the regenerative bed. Combustion air then passes through the heated regenerative bed to heat the air. The boiler temperature is kept flat across the boiler. That is, the temperature is kept almost constant across the combustion chamber. This is done by maintaining a high rate of forced supply of more than 60 m/s for the combustion air. Also, the combustion air is heated to above the ignition point of the fuel, that is, about 800.degree. C. These two factors increases thermal efficiency while reducing NO.sub.x emissions.

    摘要翻译: 锅炉在其燃烧室中设置有辐射传热部分,其中具有至少一个再生加热燃烧器系统,其包括具有再生床的一对燃烧器。 燃烧器接收通过再生床的燃烧空气和废气燃烧气体。 在其中一个燃烧器中交替地进行燃烧,并且燃烧气体进入另一个燃烧器,并且通过该另一个燃烧器的相应的再生床排出。 在再生床中回收在辐射热传递部中未完全消耗的剩余热能。 然后,燃烧空气通过加热再生床以加热空气。 锅炉温度在锅炉上保持平坦。 也就是说,燃烧室内的温度几乎保持恒定。 这是通过为燃烧空气维持高达60m / s的高强度供应来实现的。 此外,燃烧空气被加热到高于燃料的点火点,即约800℃。这两个因素在降低NOx排放的同时提高了热效率。

    Method of low-NOx combustion and burner device for effecting same
    4.
    发明授权
    Method of low-NOx combustion and burner device for effecting same 失效
    低NOx燃烧方法和燃烧装置实现

    公开(公告)号:US5403181A

    公开(公告)日:1995-04-04

    申请号:US69590

    申请日:1993-06-01

    摘要: A method of low-NOx combustion and a burner device for effecting the same, in which a primary fuel is injected in a direction from the periphery of stream of a combustion air towards that same combustion air, effecting a first combustion, so as to create a generally cylindrical primary flame covering the combustion air, whereby a secondary fuel injected towards the combustion air is shielded or intercepted by such primary flame from the combustion air, while causing NOx in the primary flame to be reduced by the secondary fuel, after which, a second combustion is effected by bringing the secondary fuel to contact with a portion of the combustion air penetrating through the primary flame, at a downstream side. This arrangement permits more positive decrease of NOx density in an exhaust gas.

    摘要翻译: 一种低NOx燃烧的方法和用于实现该燃料的燃烧器装置,其中一次燃料沿着从燃烧空气流的周边朝向同一燃烧空气的方向喷射,进行第一次燃烧,从而产生 覆盖燃烧空气的通常为圆柱形的主要火焰,由此朝向燃烧空气喷射的二次燃料被来自燃烧空气的这种主要火焰屏蔽或拦截,同时使主火焰中的NOx被二次燃料减少, 通过使二次燃料在下游侧与穿过主火焰的一部分燃烧空气接触来实现第二燃烧。 这种布置允许废气中的NOx密度的更多的正的降低。

    Combustion method of industrial combustion system
    5.
    发明授权
    Combustion method of industrial combustion system 失效
    工业燃烧系统燃烧方法

    公开(公告)号:US5944504A

    公开(公告)日:1999-08-31

    申请号:US888016

    申请日:1997-07-03

    IPC分类号: F23L15/02 F28D17/02 F23L15/00

    摘要: A combustion method in an industrial combustion system is provided, in which a low temperature combustion air to be fed to a combustion zone of the combustion system is preheated through a high-cycle regenerative combustion system. The high-cycle regenerative combustion system includes a pair of regenerators of honeycomb structure having a plurality of fluid passages defined by honeycomb walls thereof. Either of the combustion air and an exhaust gas generated in the combustion zone is adapted to selectively flow through the fluid passages, and the high-cycle regenerative combustion system has a switching cycle time set to be 60 seconds at the longest, so that the regenerator is alternately in heat-transferable contact with the combustion air flow and the exhaust gas flow to perform heat exchange therebetween. The regenerator has a temperature efficiency greater than 0.7 and the combustion air flow is preheated by the exhaust gas through the regenerator in the high temperature efficiency, whereby the combustion air is continuously preheated up to a temperature range above 800.degree. C. The high temperature air flow is continuously introduced into the combustion zone and a combustion fuel is fed to the air flow, so that a combustion reaction is generated and maintained in the combustion zone by the preheated air flow and the combustion fuel.

    摘要翻译: 提供了一种工业燃烧系统中的燃烧方法,其中通过高循环再生燃烧系统对要供给到燃烧系统的燃烧区域的低温燃烧空气进行预热。 高循环再生燃烧系统包括一对具有由蜂窝壁限定的多个流体通道的蜂窝结构的再生器。 在燃烧区域中产生的燃烧空气和废气中的任一种都适于选择性地流过流体通道,并且高循环再生燃烧系统的切换循环时间最长设定为60秒,使得再生器 交替地与燃烧空气流和废气流可热传递接触,以在它们之间进行热交换。 再生器的温度效率大于0.7,燃烧空气流由废气通过再生器以高温效率预热,燃烧空气被连续预热至高于800℃的温度。高温空气 流动被连续地引入到燃烧区中,并且燃烧燃料被供给到空气流中,从而通过预热的空气流和燃烧燃料产生燃烧反应并保持在燃烧区中。

    Boiler
    6.
    发明授权
    Boiler 失效
    锅炉

    公开(公告)号:US5890457A

    公开(公告)日:1999-04-06

    申请号:US585454

    申请日:1996-01-16

    摘要: A boiler is provided with a radiation heat transfer section in its combustion chamber, which has therein, at least one regenerative-heating burner system including a pair of burners each with a regenerative bed. The burners receive combustion air and exhaust combustion gas which passes through the regenerative beds. Combustion is alternately effected in one of the burners and combustion gas is passed into the other burner, and exhausted through the corresponding regenerative bed of this other burner. Surplus thermal energy which is not completely consumed in the radiation heat transfer section is recovered in the regenerative bed. Combustion air than passes through the heated regenerative bed to heat the air. The boiler temperature is kept flat across the boiler. That is, the temperature is kept almost constant across the combustion chamber. This is done by maintaining a high rate of forced supply of more than 60 m/s for the combustion air. Also, the combustion air is heated to above the ignition point of the fuel, that is, about 800.degree. C. These two factors increases thermal efficiency while reducing NO.sub.x emissions.

    摘要翻译: 锅炉在其燃烧室中设置有辐射传热部分,其中具有至少一个再生加热燃烧器系统,其包括具有再生床的一对燃烧器。 燃烧器接收通过再生床的燃烧空气和废气燃烧气体。 在其中一个燃烧器中交替地进行燃烧,并且燃烧气体进入另一个燃烧器,并且通过该另一个燃烧器的相应的再生床排出。 在再生床中回收在辐射热传递部中未完全消耗的剩余热能。 燃烧空气比通过加热再生床加热空气。 锅炉温度在锅炉上保持平坦。 也就是说,燃烧室内的温度几乎保持恒定。 这是通过为燃烧空气维持高达60m / s的高强度供应来实现的。 此外,燃烧空气被加热到高于燃料的点火点,即约800℃。这两个因素在降低NOx排放的同时提高了热效率。

    Tubular furnace and method of controlling combustion thereof
    7.
    发明授权
    Tubular furnace and method of controlling combustion thereof 失效
    管式炉及其燃烧控制方法

    公开(公告)号:US5410988A

    公开(公告)日:1995-05-02

    申请号:US241015

    申请日:1994-05-11

    IPC分类号: C10G9/20 F22B13/10

    CPC分类号: C10G9/206 C10G9/20

    摘要: A tubular furnace uses a fluid to be heated which is prevented from coking or a heating tube which is prevented from burning. Heat is provided through a smaller heat transfer area and problems of corrosion at low temperature of the heating pipe in the tubular furnace due to sulfur content in the fuel are solved, to thereby achieve a high efficiency. A coil path(3) is divided into a plurality of zones(2a,2b,2c,2d), each with at least one regenerative-heating-type alternate combustion system(4). The system supply combustion air to burners(5,6) through regenerative beds(7,7) and the discharge of combustion gas therefrom. Combustion is independently controlled in each zone to create a desired heat flux pattern such that a boundary layer temperature of the fluid to be heated in the zones(2a,2b,2c,2d) of the coil path(3) is lower than a coking temperature or lower than an allowable maximum temperature to be determined by the material of the heating pipe.

    摘要翻译: 管式炉使用防止被加热的流体被焦化或被防止燃烧的加热管。 通过较小的传热面积提供热量,解决了由于燃料中的硫含量导致管式炉内的加热管的低温下的腐蚀问题,从而达到高效率。 线圈路径(3)被分成多个区域(2a,2b,2c,2d),每个区域具有至少一个再生加热型交替燃烧系统(4)。 系统通过再生床(7,7)向燃烧器(5,6)供给燃烧空气,并从其中排出燃烧气体。 在每个区域中独立地控制燃烧以产生期望的热通量图案,使得线圈通道(3)的区域(2a,2b,2c,2d)中待加热流体的边界层温度低于焦化 温度或低于由加热管的材料确定的容许最高温度。

    Small once-through boiler
    8.
    发明授权
    Small once-through boiler 失效
    小型直通锅炉

    公开(公告)号:US5791299A

    公开(公告)日:1998-08-11

    申请号:US788544

    申请日:1997-01-24

    摘要: A small once-through boiler can avoid burning caused due to excessive heating of water pipes and burning around a fire hole of a burner in particular and heighten the heat load of a combustion chamber to further reduce the size of the system as compared with a prior art boiler. In the small once-through boiler, at least one regenerative burner system 20 is provided in a combustion chamber 1, the regenerative burner system 20 carrying out supply of combustion air A and exhaust of combustion gas E through a regenerator 22 and relatively changing flows of the combustion gas E and the combustion air A with respect to the regenerator 22 so as to supply the combustion air A via the regenerator 22 heated by heat of the combustion gas. Water pipe group 4 is provided apart from the combustion chamber wall surface 3 to form a passage 12 between the rear surface of the water pipe group 4 and the combustion chamber wall surface 3. Communicating openings 10 and 11 through which the combustion gas C passes are formed between adjacent water pipes at upper and lower ends of the water pipe group 4 so that a part of the combustion gas C can pass through the passage 12 provided at the rear of the water pipe group 4, whereby a part of the combustion gas C flows from the lower communicating openings 11 into the passage 12 to move upward and again flows from the upper communicating openings 10 into the combustion chamber 1.

    摘要翻译: 一个小的直通式锅炉可以避免由于水管的过度加热而引起的燃烧,特别是在燃烧器的火孔附近燃烧,并且与现有技术相比,增加燃烧室的热负荷以进一步减小系统的尺寸 艺术锅炉。 在小型直流锅炉中,在燃烧室1中设置至少一个蓄热式燃烧器系统20,再生燃烧器系统20通过再生器22进行燃烧空气A的供给和燃烧气体E的排出, 燃烧气体E和燃烧空气A相对于再生器22,以便经由由燃烧气体的热量加热的再生器22供给燃烧空气A. 水管组4与燃烧室壁面3隔开设置,在水管组4的后表面与燃烧室壁面3之间形成通路12.燃烧气体C通过的通气口10,11 形成在水管组4的上端和下端的相邻水管之间,使得一部分燃烧气体C可以穿过设置在水管组4后部的通道12,由此一部分燃烧气体C 从下连通开口11流入通道12中,从上连通开口10向上运动并进入燃烧室1。

    High-cycle regenerative heat exchanger
    10.
    发明授权
    High-cycle regenerative heat exchanger 失效
    高循环再生式热交换器

    公开(公告)号:US5695002A

    公开(公告)日:1997-12-09

    申请号:US548694

    申请日:1995-10-26

    摘要: A high-cycle regenerative combustion system has first and second regenerative heat exchanger units. A four-way valve is provided for alternately bringing the heat exchanger units into contact with a low temperature fluid and a high temperature fluid. The valve is switched at a switching cycle time not longer than 60 seconds. Each heat exchanger unit has a void ratio .epsilon. which substantially provides the maximum value (Q/V)max of the volumetric efficiency (Q/V). The temperature efficiency .eta. t is preset to be a value in a range between 0.7 and 1.0. The heat transmission coefficient h and the heat transmission area A of the heat exchanger unit are determined such that the temperature efficiency, which is calculated in accordance with a specific equation as being a function of the heat transmission coefficient, the heat transmission area and the switching cycle time .tau., falls under the preset value within the range mentioned above. Each of the first and second heat exchanger units has the cell pitch P and the cell wall thickness b, which provide the above-mentioned values of the void ratio, heat transmission coefficient and heat transmission area. Thus, a compact and high-performance regenerative heat exchanger can be obtained, which has a reduced overall volume while exhibiting the large heat transmission rate and high temperature efficiency.

    摘要翻译: 高周期再生燃烧系统具有第一和第二再生式热交换器单元。 提供四通阀,用于交替地使热交换器单元与低温流体和高温流体接触。 阀门切换周期不超过60秒。 每个热交换器单元具有基本上提供容积效率(Q / V)的最大值(Q / V)max的空隙率ε。 温度效率等级预设为0.7到1.0之间的值。 热交换器单元的传热系数h和传热面积A被确定为使得根据特定方程计算的作为热传递系数,传热面积和切换的函数的温度效率 周期时间τ在上述范围内的预设值下降。 第一和第二热交换器单元中的每个具有单元间距P和单元壁厚b,其提供上述空隙率,传热系数和传热面积的值。 因此,可以获得小型且高性能的再生热交换器,其具有减小的总体积,同时具有大的传热速率和高的温度效率。