Method of on-line coating film on the inner walls of the reaction tubes in a hydrocarbon pyrolysis reactor
    8.
    发明授权
    Method of on-line coating film on the inner walls of the reaction tubes in a hydrocarbon pyrolysis reactor 失效
    在烃热解反应器中在反应管的内壁上在线涂覆膜的方法

    公开(公告)号:US06514563B1

    公开(公告)日:2003-02-04

    申请号:US09671404

    申请日:2000-09-27

    IPC分类号: B05D722

    摘要: A method of on-line coating a coat film on the inner wall of a reaction tube in a hydrocarbon pyrolysis reactor for preventing the formation and the deposit of coke on the inner walls. This method comprises the steps of vapor depositing a mixed solution of a metal alkoxide and a chromic compound on the inner walls concurrently with introducing a carrier at a flow rate of 1-5000 kg/hr/coil at a temperature of 600-900° C. under a pressure of 0-3 kg/cm2 to form a buffer layer on the inner walls; and vapor depositing a metal alkoxide as a barrier on the buffer layer; and vapor depositing an alkali metal/alkaline earth metal compound alone or mixed with metal alkoxide as a decoking layer on the barrier. A decoking layer may further be provided on the diffusion barrier.

    摘要翻译: 在烃热解反应器中在反应管的内壁上直接涂布涂膜以防止内壁上形成和沉积焦炭的方法。 该方法包括以下步骤:在600-900℃的温度下,以1-5000kg / hr /线圈的流速引入载体同时在内壁上蒸镀金属醇盐和铬化合物的混合溶液 在0-3kg / cm2的压力下,在内壁上形成缓冲层; 并在缓冲层上蒸镀金属醇盐作为阻挡层; 并将碱金属/碱土金属化合物与金属醇盐单独或与阻挡层上的脱焦层混合。 还可以在扩散阻挡层上设置除焦层。