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CN101952659A 通过富氧燃烧控制动力发生过程的方法 无效 - 撤回

通过富氧燃烧控制动力发生过程的方法
摘要：
在满负荷条件下，该方法包括：将第一含碳燃料原料流引入炉中；将第一大体上纯氧的原料流引入炉中，以用氧气燃烧第一含碳燃料原料流；并且以第一再循环流率将自炉中排放的排气的一部分再循环到炉中，以与第一大体上纯氧的原料流一起形成具有预定平均氧含量的第一进气，从而以第一排气流率自炉中排放排气。在对应于至多90％负荷的第二负荷条件下，该方法包括：将第二含碳燃料原料流引入炉中；将第二大体上纯氧的原料流引入炉中，以用氧气燃烧第二含碳燃料原料流；以第二再循环流率将自炉中排放的排气的一部分再循环到炉中，以与第二大体上纯氧的原料流一起形成第二进气流，以便以第二排放流率自炉中排放排气，以及控制第二再循环流率从第一再循环流率到提供第二排放流率的值，该值大体上与第一排放流率一样高。
摘要（英）：

A method of controlling a process of generating power in a power plant with a boiler by combusting carbonaceous fuel with substantially pure oxygen. At full load conditions, the method includes introducing a first carbonaceous fuel feed stream into a furnace, introducing a first substantially pure oxygen feed stream into the furnace for combusting the first carbonaceous fuel feed stream with the oxygen, and recirculating a portion of the exhaust gas discharged from the furnace at a first recirculation flow rate to the furnace, to form, together with the first substantially pure oxygen feed stream, a first inlet gas stream having a predetermined average oxygen content, thereby discharging exhaust gas from the furnace at a first discharge flow rate. In second load conditions, corresponding to at most 90% load, the method includes introducing a second carbonaceous fuel feed stream into the furnace, introducing a second substantially pure oxygen feed stream into the furnace for combusting the second carbonaceous fuel feed stream with the oxygen, and recirculating a portion of the exhaust gas discharged from the furnace at a second recirculation flow rate to the furnace, to form, together with the second substantially pure oxygen feed stream, a second inlet gas stream, so as to discharge exhaust gas from the furnace at a second discharge flow rate, and controlling the second recirculation flow rate to be from the first recirculation flow rate to a value providing the second discharge flow rate to be substantially as high as the first discharge flow rate.

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