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    • 5. 发明授权
    • System for steam-cracking hydrocarbons and transfer-line exchanger
therefor
    • 用于蒸汽裂解烃和其转运线交换器的系统
    • US4097544A
    • 1978-06-27
    • US790329
    • 1977-04-25
    • Robert J. Hengstebeck
    • Robert J. Hengstebeck
    • C10G9/00F28F9/02F28F9/20C07C3/30F28F19/00
    • F28F9/20F28F9/0229C10G2400/20F28D2021/0075Y10S585/911
    • A system to produce ethylene includes, in one embodiment, separately cracking a heavy hydrocarbon feed and a lighter feed, cooling the latter product in a transfer-line exchanger before admixture with the former product and cooling the mixed product in a transfer-line exchanger. Both exchangers are preferably a novel transfer-line exchanger that has a construction including a vertical tank, with a cylindrical intermediate portion and conical bottom entrance and top exit end portions, tube sheets at the top and bottom ends of the intermediate portion of the tank, vertical tubes extending between the tube sheets and in alignment with openings in the tube sheets. The tubes extend downwardly through the lower tube sheet with their ends at openings in a conical shield that is supported in the entrance conical portion of the tank by the tubes or by the conical entrance portion of the tank. The lower tube sheet has an opening to pass steam into the chamber between that sheet and the shield or steam is introduced into that chamber through the wall of the conical entrance portion of the tank and through the shield. The construction provides egress of steam from this chamber to the entrance end of the tubes below the conical shield for mixture with product to be cooled. When using the novel transfer-line exchanger, the system can provide the cooling of the product from the steam-cracking of the heavier feed without prior admixture with cooled product from the steam-cracking of lighter feed.
    • 在一个实施方案中,生产乙烯的体系包括分开裂化重烃进料和较轻的进料,在与前一产物混合之前在转移管线交换器中冷却后者,并在转移换热器中冷却混合产物。 两种交换器优选是新型的转移线交换器,其具有包括垂直罐的结构,其具有圆柱形中间部分和锥形底部入口和顶部出口端部,罐的中间部分的顶端和底端处的管板, 垂直管在管板之间延伸并与管板中的开口对准。 管子向下延伸穿过下管板,其端部处于锥形屏蔽件的开口处,该锥形屏蔽件通过管或由罐的锥形入口部分支撑在罐的入口锥形部分中。 下管板具有一个开口,以使蒸汽通过该板和该屏蔽之间的腔室,或者蒸汽通过罐的圆锥形入口部分的壁并穿过该罩被引入该腔室。 该结构提供了从该腔室到圆锥形护罩下方的管的入口端的出口,用于与要冷却的产品混合。 当使用新的转移线交换器时,系统可以从较重的进料的蒸汽裂化提供产物的冷却,而不需要与较轻的进料的蒸汽裂化的冷却产物混合。
    • 10. 发明申请
    • Ceramic Fiber Block Reflector System
    • 陶瓷纤维块反射器系统
    • US20030121461A1
    • 2003-07-03
    • US10248946
    • 2003-03-04
    • Mr. Ram Ganeshan
    • F26B003/00F23M003/00
    • F22B37/10F23M5/08F28F1/124F28F9/20
    • Abstract of DisclosureThe present invention utilizes radiation reflectors on the refractory wall of a fired furnace opposite the spaces between adjacent tubes. The refractory radiation reflectors have a base contiguous with the refractory surface and secured to a subjacent structure, and an isosceles triangular cross section with similar sides extending from the base. The base has a dimension less than the spaces between adjacent tubes to facilitate installation in a modular construction. The radiation reflectors focus the reflected radiation from the flame onto the dark side of the tubes. The invention increases the overall heat transfer of the tube by increasing the heat flux rate for the backside of the tube, and also decreases the flux and temperature differentials between the front and rear sides of the tubes.
    • 发明内容本发明在与相邻管之间的空间相对的燃烧炉的耐火壁上使用辐射反射器。 耐火辐射反射器具有与耐火表面相邻并且固定到下部结构的基部,以及具有从基部延伸的类似侧面的等腰三角形横截面。 基座的尺寸小于相邻管之间的空间,以便于以模块化结构安装。 辐射反射器将来自火焰的反射辐射聚焦到管的黑暗面上。 本发明通过增加管的背面的热通量来增加管的整体传热,并且还降低了管的前侧和后侧之间的通量和温度差。