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镇海炼化股份有限公司炼油厂有WGZ65/3.82-6型一氧化碳锅炉三台,用于回收催化装置催化剂在再生器内烧焦再生时产生的大量高温烟气。由于该锅炉尾部没有空气预热器,排烟温度较高。在气、油混烧时,设计排烟温度最高为196℃。实际为220℃。计算表明,一台65t/h中压锅炉排烟温度每下降17～18℃,锅炉热效率就提高1％,标准油耗下降0.90kg/t汽。因此,降低排烟温度是提高锅炉热效率最有效的方法。考虑到尾部烟道空间的限制,我们安装了两组翅片管省煤器,使受热面积增加一倍,降低了排烟温度。
Zhenhai Refining and Chemical Co., Ltd. Refinery WGZ65 / 3.82-6-type carbon monoxide boiler three for the recovery of catalyst catalysis catalyst in the regenerator scorch regeneration generated when a large number of high-temperature flue gas. Since there is no air preheater at the rear of the boiler, the temperature of the exhaust gas is high. In the gas, oil mixed burning, the design exhaust temperature up to 196 ℃. The actual is 220 ℃. Calculations show that for each 65t / h medium pressure boiler, the temperature of the exhaust gas is reduced by 17-18 ℃, the boiler thermal efficiency is increased by 1%, and the standard fuel consumption is reduced by 0.90kg / t steam. Therefore, reducing the exhaust gas temperature is the most effective way to increase the thermal efficiency of the boiler. Taking into account the limitations of the aft flue space, we installed two sets of finned tube economizers to double the heated area and reduce the exhaust gas temperature.