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    • 6. 发明专利
    • SEPARATOR FOR SEPARATING RICH AND LEAN CONCENTRATIONS AT FINE POWDER COAL BURNER
    • JPH09318010A
    • 1997-12-12
    • JP13643796
    • 1996-05-30
    • MITSUBISHI HEAVY IND LTD
    • ISODA TAKAHIROYAMADA KAZUJIKOBAYASHI YOSHINORIICHINOSE TOSHIMITSUOGIWARA KOTA
    • F23C99/00F23D1/00F23C11/00
    • PROBLEM TO BE SOLVED: To cause an apparent distribution of rich and lean concentrations to be formed within the same nozzle and further enable a preferable igniting and combustion characteristic to be attained by a method wherein a core member is arranged at a position of an extremity end throttled section of a nozzle installed at a central section of a fine powder coal flow passage of a burner and having a rear edge of the extremity end formed in an extremity fine shape toward a fine powder coal blowing port. SOLUTION: A core member 1 acting as a separator for separating rich and lean concentrations of fine powder coal is arranged at the central part of a fine powder coal flow passage 6 of a fine powder coal burner 11, a rear edge part 2 at the extremity end of the core member 1 is placed against a nozzle throttle section 3, thereby fine powder coals 15 having a high inertia force are collected at an outer circumferential section of the nozzle under utilization of increased or decreased flow speed of the fine powder coal flow across the rear edge section 2 of the extremity end of the core 1, air 14 for transporting fine powder coals is recovered at the central part of the nozzle, thereby an apparent fine distribution of rich and lean concentrations of fine powder coals is formed at the fine powder coal blowing-out section. In this case, the rear edge part 2 at the extremity end of the core 1 is arranged at a slight inner side of the fine powder coal blowing-out section in such a way that it may have 0.8 to 1.5D in respect to a diameter D of the fine powder coal blowing-out section, thereby it is possible to accomplish a superior igniting characteristic as well as a superior combustion characteristic.
    • 7. 发明专利
    • COMBUSTION APPARATUS WITH CIRCULARLY FLUIDIZED BED
    • JPH03271606A
    • 1991-12-03
    • JP6825290
    • 1990-03-20
    • MITSUBISHI HEAVY IND LTD
    • IKUBO KUNIHIROKOBASHI HIROSUKEYAMADA KAZUJI
    • F23C10/18F23C10/02
    • PURPOSE:To separate circulation particles from combustion gas without a separator, by a method wherein secondary air is blown in the direction tangent to a virtual circle within a combustor in which a circularly fluidized bed is formed and swirled, and is extracted from a central part, at which the content of the particles is the smallest, on the top side of the combustor, and thus combustion gas is led into a rear heat exchanger. CONSTITUTION:With circulation particles consisting of primary air 7 raised with a combustor 1, secondary air 6 blown from a side wall part, fuel 5, limestone 4 and ash, a fluidized bed is formed in the combustor 1, and since the secondary air is tangentially blown, a rising swirly flow is produced. In the inside of the fluidized bed, the particles are separated while the swirly flow is rising, and combustion gas in which the content of the particle at central part is gradually decreased, is extracted from the central part, at which the content of the particles is the smallest, on the top side of the combustor 1 through a duct 9, and is led into a rear heat-exchanger 15, and is sent into a dust collector. In this way, since the particles in the combustion gas can be separated at the inside of the combustor 1, a separator such as a cyclone separator or the like is not necessary.
    • 8. 发明专利
    • EXTERNAL HEAT EXCHANGER FOR RECIRCULATION-FLUIDIZED BED BOILER
    • JPH02287001A
    • 1990-11-27
    • JP10586689
    • 1989-04-27
    • MITSUBISHI HEAVY IND LTD
    • YAMADA KAZUJIARAKAWA YOSHIHISA
    • F22B1/02F22B31/00F22G5/12
    • PURPOSE:To reduce the spray flow rate and the heat transfer area of a superheater or a re-heater by a method wherein an evaporator and a superheater or a re-heater are arranged in an external heat exchanger, and each cell of them is connected to a separate recirculation particle feed pipe with a valve that regulates the particle flow rate. CONSTITUTION:Recirculaion particles are taken out of a seal pot and separately supplied to cells where a superheater or a re-heater 16A and an evaporator 16B are located while the recirculation particles are separately controlled by particle take-out valves 5-1, and 5-2. The recirculation particles are so controlled by the take-out valves 15-1 and 15-2 that steam temperature is kept a specified one on the superheater or the re-heater 16A side and the combustor temperature is kept at a specified one on the evaporator 16A side. The recirculation particles supplied to the cell where the superheater or the re-heater 16A is located are fluidized by the fluidizing air from a feed pipe 16c, and after heat exchange, they are supplied to the cell where the evaporator 16B is located. By this consti tution, the spray flow rate and the heat transfer area can be reduced.