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粘胶纤维生产的压榨废碱液中含有大量的半纤维素,去除半纤维素是其稳定回收的关键环节,为降低处理成本和环境污染,同时为后期的工程设计和改造提供依据和参考,实验研究了聚丙烯酰胺(PAM)分子量、PAM添加量、Ca(OH)_2添加量、UV/O_3处理温度和接触时间、活性炭停留时间对絮凝-UV/O_3法对半纤维素去除率的影响,获得了最佳参数。当PAM分子量为2 300万、PAM添加量为0.5 g/L、Ca(OH)_2添加量为3 g/L、处理温度为50℃、接触时间为2 h、停留时间为60 min时,废碱液中半纤维素去除率可达91%,处理后的碱液可以达到工艺回收的要求。
Viscose fiber production of waste alkali lye contains a lot of hemicellulose, hemicellulose removal is the key to its stable recovery, in order to reduce processing costs and environmental pollution, while providing the basis for the late engineering design and transformation and reference, The effects of PAM molecular weight, PAM dosage, Ca (OH) 2 addition, UV / O_3 treatment temperature and contact time, residence time of activated carbon on hemicellulose removal efficiency by flocculation-UV / O_3 method were studied experimentally , Get the best parameters. When the molecular weight of PAM was 23 million, the dosage of PAM was 0.5 g / L, the dosage of Ca (OH) 2 was 3 g / L, the treatment temperature was 50 ℃, the contact time was 2 h and the residence time was 60 min Lye hemicellulose removal rate of up to 91%, after treatment of lye can reach the requirements of process recovery.