热泵干燥机用于烟花爆竹烘干的理论分析和实验研究

发布时间：2018-03-04 10:33

  本文选题：烟花爆竹　切入点：热泵干燥系统　出处：《南昌大学》2016年硕士论文　论文类型：学位论文

【摘要】：本文设计了一种针对烟花爆竹原料烘干的热泵干燥系统,在设计的过程中严格参照中华人民共和国国家标准(GB11652-89)即《烟花爆竹劳动安全技术规程》。进行热泵干燥系统的设计,从节能考虑确定热泵干燥系统为闭式循环系统,通过所需的除湿标准,确定每小时的除湿量,对热泵模块主要部件进行计算选型,其中包括压缩机、蒸发器、冷凝器、热力膨胀阀,在冷凝器和蒸发器端设有辅助加热器,分别是用于防止冬天极端天气热泵热量不足和蒸发器除霜。确定每小时的送风量,对干燥模块的风管、通风机进行计算选型。风管设有过滤除尘装置,通风机为防爆风机,系统中加入了显热交换器,有效的利用了回风的热量。在烘干房内设有温度传感器,当温度超过58℃时,热泵模块停止运行,保证烘干过程的安全性。对烘干房的送风方式进行设计,并利用Fluent进行模拟分析,地板送风顶部孔板回风的方式气流组织更为合理。通过实验数据分析热泵干燥机组的除湿性能,实验结果显示,经过24h的干燥,物料基本达到要求的湿度,热泵干燥系统工作24h的SPC(除湿能耗比)为1.13kWh/kg水,低于普通蒸汽除湿的能耗(1.2~1.8kWh/kg水),但优势并不明显,经分析认为,由于在干燥至21h时,物料含水量已基本达到烘干要求,此时物料的水分含量较少,制冷量大部分用于冷却空气,而除去水量较少,因而SPC平均值较高。在干燥后期可以停止热泵的运行,利用回风的热量对物料进行除湿,此时回风温度高且湿度较低,有一定的除湿能力,可以有效的提高热量的回收。
[Abstract]:In this paper, a heat pump drying system for fireworks and firecrackers is designed. In the design process, the heat pump drying system is designed according to the national standard GB11652-89 of the people's Republic of China (GB 11652-89). The heat pump drying system is determined to be a closed cycle system from the view of energy saving. Through the required dehumidification standard, the desiccant quantity per hour is determined, and the main components of the heat pump module are calculated and selected, including compressor, evaporator, condenser, etc. Thermal expansion valve, equipped with auxiliary heater at the end of condenser and evaporator, is used to prevent heat shortage of heat pump and defrosting of evaporator in extreme weather in winter respectively. The air duct is equipped with a filter and dust removal device, the fan is an explosion-proof fan, and a display heat exchanger is added to the system, which makes effective use of the heat of the return air. There is a temperature sensor in the drying room, when the temperature exceeds 58 鈩，

本文编号：1565329