《锅炉原理》课件PPT08 省煤器和空气预热器econmizer and .ppt

Chapter 8 Economizers and Air Heaters第八章 省煤器和空气预热器 8.1 An overview of back pass heating surfaces 第一节 尾部受热面概述 8.2 Economizers 第二节 省煤器 8.3 Air heaters 第三节 空气预热器 8.4 Corrosion, plugging and erosion of back heating surfaces 第四节 尾部受热面的磨损、积灰和腐蚀 8.1 An overview of back heating surfaces §8-1 尾部受热面概述 Economizers and air heaters perform a key function in providing high overall boiler thermal efficiency by recovering the low level (low temperature) energy from the flue gas before it is exhausted to the atmosphere. 省煤器和空气预热器在现代高效率锅炉系统中扮演重要的作用。 Economizers and air heaters locate at the back pass in boiler, so called back pass heating surfaces or low temperature heating surfaces. 省煤器和空气预热器布置在锅炉系统的尾部，被称为尾部受热面 或 低温受热面。 Inlet temperature 600oC, outlet temperature 140~170oC 8.1 An overview of back heating surfaces §8-1 尾部受热面概述 1. Function of back heating surface 尾部受热面作用 8.1 An overview of back heating surfaces §8-1 尾部受热面概述 2. Arrangement of back heating surface 尾部受热面的布置 Fig. 2 Economizer and air heater locations in a tipical coal-fired boiler 燃煤锅炉典型的省煤器和空气预热器布置 8.1 An overview of back heating surfaces §8-1 尾部受热面概述 2. Arrangement of back heating surface 尾部受热面的布置 图9-2 Arrangement of back heating surface 尾部受热面的布置 8.1 An overview of back heating surfaces §8-1 尾部受热面概述 2. Arrangement of back heating surface 尾部受热面的布置 图9-2 Arrangement of back heating surface 尾部受热面的布置 8.1 An overview of back heating surfaces §8-1 尾部受热面概述 2. Arrangement of back heating surface 尾部受热面的布置 图9-2 Arrangement of back heating surface 尾部受热面的布置 8.1 An overview of back heating surfaces §8-1 尾部受热面概述 Question: 为什么有不同的布置方式，适用条件是什么？ 8.2 Economizers§8-2 省煤器 Economizers are feed-water heaters in which the heat from waste gases is recovered to raise the temperature of feed-water supplied to the boiler. They offer the following advantages : Fuel economy Longer life of the boiler Increase in steaming capacity Finned Tube Economizers 鳍片管省煤器 C.I. Gilled Tube Economizers 肋片管省煤器 Plain Tube Coil Economizers 光片管省煤器 8.2