Passivation of steel surface to reduce coke formation
    3.
    发明授权
    Passivation of steel surface to reduce coke formation 有权
    钝化钢表面以减少焦炭的形成

    公开(公告)号:US07056399B2

    公开(公告)日:2006-06-06

    申请号:US10425544

    申请日:2003-04-29

    IPC分类号: C21D1/74

    摘要: The present invention provides a process to treat steels, preferably carbon steel to reduce the tendency of the steel to form coke when in contact with hydrocarbons at elevated temperatures. The steel may be first reduced then treated with a mixture of compounds which further modify the reduced surface and finally the treated steel surface is cured. The treated steel has a reduced propensity to form coke when in contact with hydrocarbons particularly at higher temperatures.

    摘要翻译: 本发明提供了一种处理钢,优选碳钢的方法,以降低在高温下与烃接触时钢形成焦炭的倾向。 可以先将钢还原,然后用进一步改性还原表面的化合物混合物处理,最后处理的钢表面固化。 当与烃接触时,经处理的钢具有降低的焦炭形成倾向,特别是在较高温度下。

    Industrial radiant heater
    5.
    发明申请
    Industrial radiant heater 审中-公开
    工业辐射加热器

    公开(公告)号:US20070105060A1

    公开(公告)日:2007-05-10

    申请号:US11266926

    申请日:2005-11-04

    IPC分类号: F23G7/08

    摘要: High temperature industrial radiant heaters may be improved by coating a refractory or lining in and adjacent to the flame impingement zone which refractory or lining does not transmit fuel to the burner with a metal oxide catalyst or metal oxide catalyst precursor other than iron, iron oxides or mixtures thereof, to promote the burning of one or more of the fuel, and combustion products thereof.

    摘要翻译: 高温工业辐射加热器可以通过在火焰冲击区域内和邻近的火焰冲击区域上涂覆耐火材料或内衬来改善,该耐火材料或衬里不用燃料将燃料传送到具有除铁,氧化铁之外的金属氧化物催化剂或金属氧化物催化剂前体的燃烧器 其混合物,以促进一种或多种燃料及其燃烧产物的燃烧。

    Decoke enhancers for transfer line exchangers
    6.
    发明授权
    Decoke enhancers for transfer line exchangers 失效
    对传输线路交换机进行增强

    公开(公告)号:US06772771B2

    公开(公告)日:2004-08-10

    申请号:US10108519

    申请日:2002-03-28

    IPC分类号: B08B308

    CPC分类号: C10G9/16

    摘要: In a steam cracking operation the formation of coke is a problem which needs to be overcome. While significant work has been done on decoking of furnaces little work has been done regarding transfer line exchangers. Coking of transfer line exchangers (TLE) may be reduced by injection of a solution containing at least one group 1 or 2 metal dichromate or dichromate and one or more of a group 1, 2 or 7 metal carbonate into the TLE.

    摘要翻译: 在蒸汽裂解操作中,焦炭的形成是需要克服的问题。 虽然在窑炉取样方面做了大量工作,但是对转换线路交换机的工作很少。 转移线交换器(TLE)的焦化可以通过将包含至少一种1或2族金属重铬酸盐或重铬酸盐和一种或多种第1,2或7种金属碳酸盐的溶液注入到TLE中来降低。