Waste heat utilization system of annealing furnace

The utility model relates to an annealing furnace waste heat utilization system which comprises an exhaust heat exchanger and a molecular sieve adsorption concentration rotating wheel, a hot air inlet of the exhaust heat exchanger is connected with an outlet of a waste gas exhaust fan on a furnace body, and a cold air outlet of the exhaust heat exchanger is connected with the molecular sieve adsorption concentration rotating wheel. A hot air outlet of the exhaust heat exchanger is connected with an inlet of an air inlet fan on the furnace body; according to the waste heat utilization and air purification system of the annealing furnace, heat in exhausted gas is recycled and used for heating fresh air entering the furnace body, energy is saved, meanwhile, rolling oil in the exhausted gas is recycled, energy is further saved, and the production cost is reduced. 本实用新型涉及一种退火炉余热利用系统，包括排气换热器和分子筛吸附浓缩转轮，所述排气换热器的热气进口与炉体上废气排放风机的出口连接，所述排气换热器的冷气出口与分子筛吸附浓缩转轮连接，所述排气换热器的热气出口与炉体上进气风机的进口连接；该退火炉余热利用与空气净化系统，实现了回收排气中的热量并用于加热进入炉体