全棉水刺非织造布的低碳节能冷堆处理工艺

Study on low-carbon and energy-saving cold pad-batch bleaching treatment of cotton spunlaced nonwoven

为推动纺织行业实现碳中和、碳达峰目标,在满足绿色低碳、节能减排的前提下,以碱氧浓度、冷堆时间、双氧水活化剂浓度及不同处理方法为主要分析点,对全棉水刺非织造布采用冷堆脱漂工艺处理,分析其对质量损失率、吸水量、白度及残余液pH值、化学需氧量(COD)等的影响,并从微观结构上对形貌变化进行分析。结果表明:双氧水活性室温冷堆比碱氧冷堆时间可缩短4 h,温度比高温碱氧降低60℃,且白度比高温碱氧仅减少0.41%,残余液pH值与泡沫高度满足要求,COD值比高温碱氧处理仅高出104 mg/L;在一定程度上冷堆脱漂工艺可代替高温碱氧处理工艺,具有低碳节能的优点。

As a bid to achieve the carbon neutrality and carbon emission peak in the textile industry,the influence of weight loss,water absorption,whiteness,residual pH value and COD value ws investigated by analysing alkali oxygen concentration,cold pad-batch time,hydrogen peroxide activator concentration,different treatment methods,as well as the microstructure of cotton spunlaced nonwoven fabrics.The results showed that the production cycle of hydrogen peroxide activator cold pad-batch was 4 h shorter than that of alkali oxygen cold pad-batch,and in addition the temperature was 60℃lower than high temperature alkali oxygen process and whiteness was only decreased by 0.41%.The COD value increased by only 104 mg/L,with both the residual pH value and foam height meeting the requirements.Cold pad-batch bleaching technique with the advantages of low carbon and energy saving demonstrated great potential for replacing the high-temperature alkaline oxygen treatment process.