逆流式自然通风冷却塔及除水器节水研究

发布时间：2018-05-28 22:17

  本文选题：冷却塔 + 节水　； 参考：《昆明理工大学》2014年硕士论文

【摘要】：目前火力发电厂最大的耗水项目是冷却塔的水损失,在国内外开展了大量关于冷却塔节水工作的研究。首先,本文比较全面的介绍了冷却塔节水技术在国内外的研究现状,在此基础上对各种节水方案的措施进行综合分析,最后提出了风吹水损失对冷却塔的危害性,并指出选择合适的除水器是解决这一问题的关键。 本文根据逆流式自然通风冷却塔的性能,以传热传质为前提,得到了冷却塔风吹损失的计算模型以及求解程序。以某300MW机组的冷却塔为实例,给出冷却塔在不同工况下的参数,并对比出塔水温、风吹损失等各参数间计算值与实测值的结果,比较其相对误差在允许范围内,验证了风吹损失用此计算模型研究的可行性。 本文以冷却塔的除水器为研究对象,在比较6种不同型号除水器后,利用正交实验设计方法,重点对BO-160/50型BO-145/42型和SO-180/42型3种不同型号除水器进行比较分析,同时对其节水效益进行比较,提出双波除水器SO-180/42型能更加减少耗水量和有效减少风吹损失。 分析了在塔内安装了SO-180/42型除水器后,对于出塔水温和冷却效率的影响。结果表明：冷却塔安装SO-180/42型双波除水器后,由于抽力增大,使出塔水温降低了0.18℃。但是,回收后的飘滴落在冷却塔集水池中,与水池中的水相混合,提高了水池水温。经计算,落入水池中的飘滴可使池中水温升高约0.14℃C,二者相抵,冷却塔安装除水器对出塔水温没有影响；自然通风冷却塔加装双波除水器SO-180/42型后,由于冷却塔内的总阻力增加较少,对冷却塔的冷却效果无显著影响。
[Abstract]:At present, the biggest water consumption project of thermal power plant is the water loss of cooling tower. A lot of research on water saving of cooling tower has been carried out at home and abroad. First of all, this paper introduces the research status of cooling tower water-saving technology at home and abroad, on the basis of comprehensive analysis of various water-saving measures, finally puts forward the harm of wind blowing water loss to cooling tower. It is pointed out that the key to solve this problem is to select a suitable water remover. Based on the performance of the countercurrent natural ventilation cooling tower and on the premise of heat and mass transfer, the calculation model and the solution program of the wind blowing loss of the cooling tower are obtained in this paper. Taking the cooling tower of a 300MW unit as an example, the parameters of the cooling tower under different working conditions are given, and the calculated and measured results of the parameters such as tower water temperature and wind blowing loss are compared, and the relative errors are compared within the allowable range. The feasibility of using this model to study wind loss is verified. In this paper, the dewatering device of cooling tower is taken as the research object. After comparing six different types of water remover, the author makes a comparative analysis of three different types of water remover of BO-160/50 type BO-145/42 and SO-180/42 type by using orthogonal experimental design method. At the same time, the water saving benefit is compared, and it is proposed that the SO-180/42 type of dual wave water remover can reduce water consumption and wind blow loss more effectively. The influence of SO-180/42 type water remover on the water temperature and cooling efficiency of the tower is analyzed. The results show that the water temperature of the cooling tower is reduced by 0.18 鈩，

本文编号：1948390