玻璃钢切边打磨纤维粉尘收集净化

根据玻璃钢切边打磨的工艺状况以及手工加工产生的纤维粉尘的特点,采用冲击、过滤、喷淋三级一体化净化装置净化含尘气流,取得良好的净化效果。浅述了净化系统的集气设备、净化原理、工艺流程和排风量计算等工程设计问题。     

光催化氧化与吸附组合工艺处理C5树脂生产装置污水站废气

本文对碳五树脂生产装置污水站产生的废气提出了针对性的组合处理工艺,并在浙江某树脂生产企业成功应用,取得了较好的效果。     

Modelling of the effect of size on flocculent dust explosions

The effect of size on the severity of explosions involving flocculent materials has been simulated by means of a model previously developed for spherical particles and here extended to the cylindrical geometry of flock. The model consists of the identification of the regime (internal and external heating, pyrolysis/devolatilization reaction, and volatiles combustion) controlling the explosion by the evaluation of dimensionless numbers (Bi, Da, Th and Pc) and then of the estimation of the deflagration index as a function of flocculent size. The model has been validated by means of explosion data of polyamide 6.6 (nylon) at varying diameter and length. The comparison between model and experimental data show a fairly good agreement.     

棉花阴燃和明火燃烧特性的对比研究

利用锥形量热仪,选取不同辐射强度,分别在使用和不使用点火器条件下,对棉花进行了热辐射引燃实验,发现在热辐射强度大于6kW/m2的情况下,使用点火器时棉花发生明火燃烧,不使用点火器时棉花发生阴燃燃烧。实验分别测得了在两种燃烧形式下的引燃时间、热释放速率、质量损失速率一氧化碳生成率,结果表明:无论是发生阴燃还是明火燃烧,引燃时间均随着辐射强度的增加而减小,且引燃时间平方根的倒数与辐射强度成线性关系;热释放速率、质量损失速率的峰值和平均值均随辐射强度的增加而增加,但在同一辐射强度下,明火燃烧的峰值和均值均比阴燃燃烧时的大;明火燃烧的一氧化碳平均生成率随着辐射强度的增加而减小,阴燃燃烧的一氧化碳平均生成率随着辐射强度的增加而增加。     

Sustainable monitoring of concrete structures: strength and durability performance of polymer-modified self-sensing concrete

Concrete structures all over the world are reaching the end of their service life sooner than expected. This is due to the fact that ordinary Portland cement-based concrete deteriorates under environmental actions and also that structural inspections and conservation actions are expensive. Besides, as they consume energy and non-renewable resources, they have negative environmental impacts. Self-sensing concrete provides an alternative way of monitoring concrete-reinforced structures at a much lesser cost and with lesser environmental impact. Although the short-term mechanical properties of these materials are usually well documented, the long-term durability issues about carbon fibre concrete still deserve further investigations. This paper reports some investigation of the strength and durability characteristics of several concrete mixtures modified with different percentages of polymer and carbon fibre addition. The results show that the addition of carbon fibre decreases the strength and increases water penetration under pressure and also increases chloride diffusion, whereas polymer addition is responsible for a denser microstructure and higher concrete durability.     

培养温度对好氧法处理棉浆黑液的影响分析

对不同浓度的棉浆黑液分别在高温和中温条件下进行了好氧培养,并考察了各种COD的降解情况。结果表明：温度对棉浆黑液好氧处理的各种COD去除效果影响较大。对于低浓度棉浆黑液（CODtot≤10000mg／L）,30℃时,随着培养时间的延长,各种COD持续下降,CODtot和CODcol去除率最大分别可达55．7％和100％;而50℃时,CODtot去除率最高只能达到35．4％,且CODss和CODcol波动很大;对于高浓度棉浆黑液（CODtot≥10000mg／L）,中温条件更有利于好氧活性污泥发挥生物降解作用     

胶原纤维固化黑荆树单宁吸附Cr(VI)的研究

研究了胶原纤维固化黑荆树单宁对Cr(VI)的吸附.采用不同温度、pH值等条件进行吸附研究,并进一步探讨了固化黑荆树单宁的吸附动力学和吸附柱动力学及其吸附机理.结果表明,该材料对Cr(VI)的吸附平衡符合Freundlich方程,温度对吸附平衡的影响不明显;吸附动力学可用拟二级速度方程来描述,该材料同时具有良好的柱动力学特性;Cr(VI)的吸附过程可能存在3个反应,即Cr(VI)与吸附剂之间发生氧化还原反应生成Cr(III),Cr(III)和-COOH之间发生离子交换反应,以及Cr(III)与单宁的邻位羟基发生螯合.图8表2参10     

ACF床动态吸附及脱附性能试验研究

利用活性炭纤维(ACF)床在热态下进行动态吸附及脱附性能试验,研究了W/Q、水蒸汽含量对ACF吸附性能的影响,并利用ACF的选择性吸附性能,采用分段吸附,以达到同时高效吸附SO2和NOx.对ACF床进行了水洗脱附与负吸热空气法脱附试验.