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    • 9. 发明授权
    • Catalyst regeneration with varying air flow to burn-off zone from drying
zone through halogenation zone
    • 催化剂再生,具有不同的空气流动,从干燥区通过卤化区到燃烧区
    • US4701429A
    • 1987-10-20
    • US920556
    • 1986-10-20
    • Arthur R. Greenwood
    • Arthur R. Greenwood
    • B01J8/08B01J38/26C10G35/12B01J38/44B01J23/96C10G35/085
    • C10G35/12B01J38/26B01J8/08
    • Method for effecting multiple treatment steps needed to regenerate spent hydrocarbon conversion catalyst. Catalyst is contacted with a hot oxygen-containing gas stream in order to remove coke which accumulates on the catalyst while it is in a hydrocarbon conversion zone. After the coke is burned off in a combustion zone, catalyst is passed into a halogenation zone wherein a halogen is deposited on the catalyst. Catalyst leaving the halogenation zone is passed into a drying zone for removal of water formed in the combustion zone which has remained on the catalyst instead of being carried off with combustion gases. Water removal is accomplished by passing a hot dry air stream through the catalyst in the drying zone. A portion of the air stream which has passed through the drying zone is passed through the halogenation zone in admixture with a halogen, while the balance of the air stream leaving the drying zone is removed from the regeneration apparatus by venting it to the atmosphere or another disposal location. That portion of the air stream which is utilized in the halogenation zone is then passed into the combustion zone where it provides the oxygen required to accomplish burning of the carbon. The flow of air into the drying zone is controlled at a rate established to accomplish the degree of desired drying. The oxygen content of the gas flowing to the burn-off zone is monitored and the amount of gas vented from the drying zone is adjusted in order to maintain the desired concentration of oxygen. In this manner, the amount of air supplied to the burn-off zone is adjusted independently of the air supplied to the drying zone.
    • 用于再生废碳氢化合物转化催化剂所需的多个处理步骤的方法。 催化剂与含热氧气流接触,以便在碳氢化合物转化区中除去积聚在催化剂上的焦炭。 在焦炭在燃烧区中燃烧之后,催化剂进入卤化区,其中卤素沉积在催化剂上。 离开卤化区的催化剂进入干燥区,以除去在燃烧区中形成的水​​,该燃烧区中残留在催化剂上,而不是用燃烧气体带走。 除水是通过将热的干燥空气流通过干燥区中的催化剂来完成的。 已经通过干燥区的空气流的一部分与卤素混合地通过卤化区,而离开干燥区的空气流的平衡通过排放到大气或另一个中而从再生装置中排出 处置地点。 然后将在卤化区中使用的空气流的那部分进入燃烧区,在那里提供完成燃烧碳所需的氧气。 进入干燥区域的空气流量以达到所需干燥程度而建立的速率被控制。 监测流入燃烧区的气体的氧含量,调整从干燥区排出的气体量,以保持所需的氧气浓度。 以这种方式,供应到燃烧区域的空气量被独立于供应到干燥区域的空气进行调节。