Does China's digital economy contribute to low-carbon transition?

The digital economy,as a new emerging economic form,has become an important power for realizing Chinese-style modernization and promoting green development in China.This paper measures the digital economy and low-carbon transition index based on the data of 30 provinces in China from 2013 to 2020 and analyzes the mechanism and path of the digital economy affecting low-carbon transition using the fixed effect panel data model and the threshold effect model.It is found that,(1)The digital economy and low-carbon transition in China are various in different regions,with characteristics of being unbalanced and insufficient.(2)The digital economy significantly promotes low-carbon transition,with the greatest influence in the Central region,followed by the Eastern region and the Western region.Under different dimensions,the development of informatization and digital transactions promote low-carbon transition,but the development of the internet plays an inhibiting role.(3)The higher the degree of urbanization and environmental regulation,the greater the influence of the digital economy on low-carbon transition.

瓶片清洗污水集成处理技术在再生纺化纤中的应用

对再生化纤生产过程中的废水循环再利用进行了分析,阐述了生产废水循环再利用对企业降低成本的利好。同时,也对未经处理直接使用的循环废水对纤维生产过程、纤维产品品质的不利影响作了分析。通过研究膜处理工艺在循环废水的处理中的应用,包括降低废水中的盐度、可溶解性固体浓度等,不仅使熔体过滤器使用寿命延长40%~60%,瓶片清洗质量得到大幅提高,而且使纤维的膨松度、压缩弹性回复率、纤维中空率均有所提高,纤维中的疵点含量、超倍长纤维含量有不同比例的下降。此外,还可以减少污水排放,降低成本,具有环境效益和经济效益。该工艺在再生化纤行业具有推广应用的潜力。

再生纺环吹系统VOCs的产生和减量技术的研讨

再生聚酯熔融纺丝过程中,由于环吹风装置与纺丝箱装配不密封产生的挥发性有机物(VOCs)容易排放至空气中,这是再生聚酯生产过程中产生VOCs的重要组成部分。再生聚酯在环吹阶段产生的挥发性有机物主要为乙醛、甲醛、苯、甲苯、苯甲醛、二甲苯等物质。其中乙醛是最主要的成分,占总挥发性物质的64%。通过优化环吹系统,在回风前使用过滤—水洗—预浓缩—焚烧工艺,废气综合处理率可达78.4%。在生产线上加置PID检测器,实现了VOCs浓度在线监控,进一步形成了环吹VOCs在线监控-高效处理技术,为实现绿色制造提供了借鉴作用。