工业热水锅炉为何不宜采用大气式热力除氧？

对腐蚀介质进行处理是防止腐蚀的途径，它又可分为：去掉介质中的有害成分；在水中加入能减慢腐蚀的缓蚀剂。水中溶解的杂质，易使金属腐蚀的种类很多，尤其是溶解氧的存在，腐蚀特别严重。因此，给水除氧成为防止锅炉、换热器及管道腐蚀的首要任务。
热水锅炉流过的水量很大，直供系统这些水还要流过热力管道和散热器，其防止水侧腐蚀问题不仅涉及热水锅炉，还涉及到整个热水供热系统(有些热水锅炉房都没有蒸汽源)。总之，热水锅炉的除氧问题有其特殊性，往往比蒸汽锅炉除氧存在的问题更多。
热水锅炉房无蒸汽源，故一般都不用大气式热力除氧。真空除氧可不用蒸汽加热，但要增设一套抽真空装置，并且系统要保持严密；除氧器要设置在7—8米的楼层上，故也很少用。过去曾采用过氧化还原树脂除氧，其除氧效果好，水温可以较低。但初期投资较大，更为不利的是失效后要用含毒性的水合肼还原。加亚*除氧，初投资较小，但加药物等运行费用较高；水质、水温、PH、的过剩量的变化，对除氧效果影响较大。

中译英：
On the corrosion medium treatment is most commonly used to prevent corrosion of the way, it can be divided into: to remove harmful ingredients in medium; adding water can slow down the corrosion inhibitor. Dissolved impurities, the metal corrosion of many species, especially the presence of dissolved oxygen, particularly serious corrosion. Therefore, to prevent the boiler feed water deaerator become, heat exchanger and the primary task of pipeline corrosion.
Hot water boiler with large amount of water flowing through the water, direct supply system which also flows through the heat pipe and radiator, which prevents water side corrosion problem involves not only hot water boiler, also relates to the hot water heating system(some hot water boiler room no steam source). In short, hot water boiler deaerator has its particularity, more often than steam boiler deaerator problems more.
Hot water boiler steam source, so in general do not have atmospheric thermal deaerator. Vacuum deaeration without steam heating, but a set of vacuum pumping device, and the system will remain absolutely tight; deaerator to set in 7 - 8 meters of floor, it is also rarely used. Once the redox resin deoxidation, its good deoxidizing effect, the water temperature can be lower. But the initial investment is larger, more unfavorable is failure to use toxic hydrazine. Plus sodium sulfate removal, the initial investment is small, but with the addition of drugs and other operating costs; water quality, water temperature, PH, excess volume changes, on the deaerating effect.
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