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针对全热回收新风机组二次携带污染物风险进行了测试、分析。以聚合物膜式全热回收机组为对象的测试,采用甲苯、丙酮、氨气作为示踪气体模拟室内空气污染物,利用示踪气体声谱分析仪实时监测气态污染物由排风渗透至新风的浓度和比例。针对转轮式全热回收机组的分析则基于国内外文献调研。测试及分析结果显示,聚合物膜式全热回收机组二次携带污染物比例在6%~9%,转轮式全热回收机组二次携带污染物比例在10%~30%。热回收型新风机组选用过程中应适当增加新风量用于抵消污染物交叉传递所带来的影响,对于聚合物膜式及转轮全热回收机组,考虑污染物扩散修正后的新风量建议增加至设计新风量的110%,143%。
For the total heat recovery of fresh air units carry the risk of secondary pollutants were tested and analyzed. Tested on polymer membrane type total heat recovery unit, toluene, acetone and ammonia were used as tracer gases to simulate indoor air pollutants. The tracer gas spectrum analyzer was used to monitor the infiltration of gaseous pollutants from fresh air into fresh air in real time Concentration and ratio. The analysis of the rotary heat recovery unit is based on literature research at home and abroad. The results of testing and analysis show that the proportion of secondary contaminants carried by the polymer membrane heat recovery unit is between 6% and 9% and that of the secondary total heat recovery unit of the rotary drum unit is between 10% and 30%. Heat recovery type of fresh air unit selection process should be appropriate to increase the amount of fresh air used to offset the impact of cross-transfer of pollutants for the polymer membrane and run-length heat recovery unit, taking into account the revised pollutant diffusion amount of fresh air is proposed to increase To the design of the new air volume of 110%, 143%.