Divide accuse preheating of air system that waste heat utilization is synthesized in phase transition

The utility model discloses a divide accuse preheating of air system that waste heat utilization is synthesized in phase transition, the system includes: air heater (33), air heater primary air separating duct (31), air heater rear flue (32), condensate water trunk pipe (11), main steam range (15), air heater (28), flue gas phase change cooling ware (12), flue gas water chiller (7), phase transition water heater (17), condensate water governing valve (30), steam flow governing valve (14), liquid stream pipe (5). The utility model discloses adopt to divide an accuse phase transition heat exchange mode with final stage residual heat?from flue gas heat exchanger, make up with the high temperature gas cooler with condensate water air heater, improved waste heat recovery's benefit. 本实用新型公开了种分控相变综合余热利用的空气预热系统，所述系统包括：空气预热器(33)、空气预热器前风道(31)、空气预热器后烟道(32)、凝结水主干管(11)、蒸汽总管(15)、空气加热器(28)、烟气相变冷却器(12)、烟气水冷却器(7)、相变水加热器(17)、凝结水调节阀(30)、汽流调节阀(14)、液流管(5)。本实用新型将末级烟气余热回收换热器采用分控相变换热方式，与凝结水空气加热器和高温烟气冷却器组合，提高了余热回收的效益。