空气预热器是与锅炉配套使用的一种预热设备，锅炉尾部烟道中的烟气通过散热片将到达锅炉前的空气进行预热，目的是提高锅炉的热交换性能，并降低能量的消耗。后来在使用过程中出现了锅炉空气预热器漏风的现象，这对于热交换效果有着严重的影响，于是人们开始改造其密封装置，减少了漏风率，带来诸多好处。
Air preheater is a preheating device is matched with a boiler, boiler flue gas in the flue gas through the heat sink will arrive before the boiler air preheating to improve boiler heat exchange performance, and reduce energy consumption. Later in the use of process in the boiler air preheater leakage phenomenon, which for the heat exchange effect has a serious impact, so people began to transform the sealing device, reduces the air leakage rate, bring many benefits.
直观的是确保了锅炉燃烧氧量的充足，从而提高了锅炉的工作效率，同时对降低排烟的热损失也起到了极大的促进作用。还在一定程度上减少了空气和烟气流量，使得运行过程中所产生的能耗以及对设备的磨损也有了明显的降低。综合来看，不仅降低了成本，在维修设备时也变得更简单，可谓一举多得。
The most direct viewing is to ensure the oxygen quantity of boiler burning, so as to improve the boiler efficiency, at the same time to reduce the heat loss of smoke also played a great role in promoting. The energy consumption and the wear of the equipments are obviously reduced to some extent.. On the whole, not only reduces the cost, but also become more simple in the maintenance of equipment, can be described as multiple.
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