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    • 51. 发明专利
    • Method of low nox combustion and combustor therefor
    • 低NOX燃烧方法及其制备方法
    • JPS5731710A
    • 1982-02-20
    • JP10528380
    • 1980-07-30
    • Kawasaki Heavy Ind Ltd
    • KURATA CHIKATOSHISHIRAHANE MICHIHIROKATOU KOUZOUFUJII KENICHI
    • F23C99/00
    • PURPOSE: To reduce the generation of NO
      x easily and effectively by a method wherein fuel and combustion air are supplied into a furnace through separate ports respectively, and a flame is maintained by a flame maintaining burner.
      CONSTITUTION: A boiler 1 has the furnace 1a, a pair of heat exchangers 1b and 1c, an air preheater 2 and a chimney 3. The fuel is thrown into the furnace 1a through fuel supply ports 4a, 4b and 4c having fuel injection pipes and attached at the tip of a fuel supply line for denitration combustion. On the other hand, a combustion air is introduced into the furnace 1a via independent double-staged combustion air ports 5a, 5b and 5c. The flame maintaining burner 8 functions to stabilize the combustion within the furnace.
      COPYRIGHT: (C)1982,JPO&Japio
    • 目的:通过分别将燃料和燃烧空气分别供入炉内并通过火焰保持燃烧器维持火焰的方法,容易且有效地减少NOx的产生。 构成:锅炉1具有炉1a,一对热交换器1b和1c,空气预热器2和烟囱3.燃料通过具有燃料喷射管的燃料供给口4a,4b和4c被投入炉1a中, 连接在用于脱硝燃烧的燃料供应管线的末端。 另一方面,燃烧空气通过独立的双级燃烧空气口5a,5b和5c引入炉1a中。 火焰保持燃烧器8用于稳定炉内的燃烧。
    • 52. 发明专利
    • PULVERIZED COAL BURNER
    • JPS56119406A
    • 1981-09-19
    • JP2241380
    • 1980-02-25
    • KAWASAKI HEAVY IND LTD
    • DEWA KOUSHINANO TOMOYUKISHIBAYAMA MASAYOSHIKURATA CHIKATOSHIFUJII KENICHI
    • F23C99/00F23D1/00F23D1/02
    • PURPOSE:To minimize production of NOx and to raise the combustion efficiency, by forming a flame holder at the top of a primary throat in a unitary manner, disposing a secondary throat on the outside of the primary throat in a freely retractable manner, and forming a burner throat in the form of a diffuser. CONSTITUTION:An outwardly enlarged flame holder 7 is formed at the top of a primary throat 1 in a unitary manner, and a secondary throat 3 for feeding secondary air is disposed on the outside of the primary throat 1 concentrically therewith and in a freely retractable manner. Further, a burner throat 4' for feeding tertiary air is disposed on the outside of the secondary throat 3. Here, the burner throat 4' is shaped in the form of a diffuser. With such an arrangement, it is enabled to restrict mixing of pulverized coal with secondary and tertiary air, so that the pulverized coal is combusted by primary air slowly and at a low temperature. Here, because of shortage of O2 in primary flame 5, production of NOx can be minimized. Further, production of CO and uncombusted carbon can be also minimized since the combustion efficiency can be raised by the diffuse combustion.
    • 53. 发明专利
    • BURNER FOR COMBUSTING PULVERIZED COAL
    • JPS5644505A
    • 1981-04-23
    • JP12001879
    • 1979-09-20
    • KAWASAKI HEAVY IND LTD
    • DEWA KOUSHINANO TOMOYUKISHIBAYAMA MASAYOSHIKURATA CHIKATOSHIFUJII KENICHI
    • F23D1/02F23C99/00F23D1/00
    • PURPOSE:To reduce the amount of NOx generated by combustion of pulverized coal remarkably, by selecting the swirl angle of a swirler to be 25-35 deg., providing a flame retaining plate at the top of a primary throat, and designing a secondary throat to be movable in backward and forward directions. CONSTITUTION:The swirl angle of a swirler 2 is selected to be 25-35 deg., and a flame retaining plate 7 diverged outwards is provided at the top of a primary throat 1. Around the primary throat 1 on the outside thereof, there is provided a secondary throat 3 coaxially with the primary throat 1 in the manner that it can be moved back and forth. With such an arrangement, pulverized coal ejected from the primary throat 1 is prevented from being scattered widely and it is combusted slowly at a low temperature because of shortage of O2. On the other hand, since secondary air issued from secondary throat 3 flows outwards, mixing of the same with pulverized coal in the primary flame zone can be hindered. Further, since the secondary and tertiary air flow can be controlled by moving secondary throat 3 back and forth, it is enabled to reduce the amount of NOx produced by combustion of pulverized coal considerably.