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中文摘要：
针对印染业的余热回收和节能减排，设计了中高温和中低温两级热泵系统，回收印染废水余热并回用于不同印染工序；针对印染废水水质较差，易在换热器表面形成污垢问题，进行了污垢与换热的综合分析和污垢监测系统设计，预测清洗周期并给出清洗建议。
英文摘要：
Huge amount of waste heat exists in printing and dyeing wastewater for its large rate of flow. Second stage heat pump system using medium-high and medium-low refrigerants is designed for waste heat recovery from printing and dyeing wastewater, aiming to provide heat for different printing and dyeing process. Meanwhile, the complex water quality of wastewater can cause severe fouling problem in heat exchangers of heat pump system. A fouling monitoring system is de- signed and relation between fouling and heat transfer is comprehensively analyzed in this study, by which the cleaning period can be predicted and cleaning strategies can be given. This study will provide the reference for waste heat recovery from print- ing and dyeing wastewater with fouling problem using heap pump system.
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