【作者】 王顺林；

【导师】 裴清清；

【作者基本信息】 广州大学 ， 供热、供燃气、通风及空调工程， 2007， 硕士

【摘要】 一方面，液体除湿由于空气带液问题而给室内带来一些金属离子，同时也增加了除湿空气中的气溶胶粒子含量，从而对空气品质构成了负面影响。但是另一方面，填料塔结构类似湿式除尘器，能去除空气中气溶胶粒子，起到改善空气品质的作用。为分析在不同除湿剂下这两种作用的程度，本文分别以LiCl、CaCl₂及其1：1的混合溶液为除湿剂，初步实验研究了液体除湿环境下的室内空气品质。通过理论计算，设计并搭建了除湿实验系统。首先以LiCl溶液为除湿剂，对空气中Li⁺的不同采样方式、采样时间和采样位置进行了对比性实验。由实验结果得到，本实验采样方法选为去离子水吸收法，采样时间定为2～3h，采样位置选为风口较为合适。然后分别以三种溶液为除湿剂，进行了除湿塔的除湿性能实验，结果表明三种除湿剂中以混合溶液的性价比最高。在液气比为0.4～1.5、0.7～1的除湿条件下，分别对填料塔的出口空气的Li⁺、Ca²⁺浓度和进出口空气的气溶胶粒子个数浓度进行了检测。检测结果显示：当以混合溶液为除湿剂时，空气中共存的Li⁺、Ca²⁺浓度之和要大于单一成分除湿剂的Li⁺或Ca²⁺浓度，但其最大值未超过70μg／m³；本实验台填料塔对粒径≥5μm气溶胶粒子有明显的除尘作用，其它小粒径范围的气溶胶粒子，由于液沫夹带和溶液腐蚀的原因，出现除湿塔出进口浓度比值大于1的现象。更多还原

【Abstract】 On the one hand, liquid desiccant has negative effects on the indoor air quality (IAQ)because flowing air carries small drops of desiccant solution to bring directly metal-ionsof liquid desiccant into indoor air and increase simultaneously its aerosol particlescontent. On the other hand, however, packed column also plays role in the improvementair quality for the same function of filitering particles as wet scrubber indehumidification process. In order to analyze these two kinds of effect under the differentliquid desiccant, this paper studies initially on IAQ of liquid desiccant air conditioningby using different solutions of Lithium Chloride, Calcium Chloride and mixture ofLithium Chloride and Calcium Chloride at equal proportion as the liquid desiccantrespectivily.Through the theoretical calculation, a liquid desiccant experimental system isdesigned and built in this paper. Firstly, a comparison experiment for different airsampling means, different air sampling intervals and different positions for Lithium Ionin dehumidified air is carried on by taking Lithium Chloride solution as liquid desiccant.The experimental results show that it is appropriate for the experimental system in thispaper to choose deionized water absorption method as the sampling mean, 2 to 3 hours asthe sampling interval and air outlet as the sampling position. Then the experimentresearch is conducted on desiccant performance of packed column by using the threekinds of solutions as liquid desiccant, and the result indicates that the mixed solution hasthe highest cost-performance in the three kinds of solutions.The concentration of LithiumIon and (or) Calcium Ion and the concentration of the number of the aerosol particles indehumidified air is detected under the liquid to gas ratio from 0.4 to 1.5 and from 0.7～1respectivily. It can be concluded from the detected results that the sum of theconcentration of Lithium Ion and Calcium Ion in dehumidified air when using mixedsolution as liquid desiccant is higher than that of Lithium Ion or Calcium Ion while usingLithium Chloride solution or Calcium Chloride solution as liquid desiccant respectively,but the maximum value of them doesn’t go over 70μg/m~3, and the packed cloum has clear dusting function to the aerosol particles whose diameter is over 5μm while the ratioof the concentration of the number of the aerosol particles at outlet to inlet is more than 1for others with smaller particle size because of the effect of entrainment and solutioncorrosion.更多还原