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    • 3. 发明授权
    • Radiation shield and method of use
    • 辐射屏蔽及使用方法
    • US4388066A
    • 1983-06-14
    • US289100
    • 1981-07-31
    • Cuddalore P. NatarajanSiegfried R. Meder
    • Cuddalore P. NatarajanSiegfried R. Meder
    • F24H1/43F24H9/00F27D7/00F22B7/04F24J3/00
    • F24H9/00F24H1/43
    • A coiled arrangement of pipes convey a heated medium, such as a slurry, into, through, and out of a heater or fire box provided with an arrangement of high velocity burners. The heater is fired to a preselected elevated temperature. A plurality of radiation shields are positioned in close proximity to the surfaces of the pipes conveying the medium for heating. The position of the radiation shields relative to the pipes forms inner and outer heating zones within the heater to provide different flame temperatures. The radiation shields function as a physical barrier to prevent direct contact of the fuel flame and combustion products with the pipes. Thus the radiation shields are maintained at a higher temperature than the surfaces of the pipes and at a lower temperature than the combustion products. The radiation shields limit the flame radiation to the pipes and thereby reduce the rate of heat transfer to the medium permitting the use of high flame radiating temperatures in the heater so that a relatively low rate of heat transfer is obtainable inside a fire box, without unduly reducing the fire box temperature.
    • 管道的盘绕布置将加热的介质(例如浆料)传送到设置有高速燃烧器的加热器或火箱中,通过和离开。 将加热器发射到预选的高温。 多个辐射屏蔽被定位成紧邻传送用于加热的介质的管道的表面。 辐射屏蔽相对于管道的位置形成加热器内部和外部加热区域,以提供不同的火焰温度。 辐射屏蔽作为物理屏障起到防止燃料火焰和燃烧产物与管道直接接触的作用。 因此,辐射屏蔽保持在比管的表面更高的温度下,并且在比燃烧产物低的温度下。 辐射屏蔽将火焰辐射限制在管道上,从而降低向介质传热的速率,从而允许在加热器中使用高火焰辐射温度,以便在火箱内可获得相对低的传热速率,而不会过度 减少火箱温度。