有机棉竹浆WinCool混纺纱的开发

为顺利开发有机棉竹浆WinCool混纺纱,针对原料性能差异大的特点,采用两步混料法,提高了原料的可纺性及混纺比的准确性。通过开清棉以梳代打,控制打手速度;梳棉合理配置梳理工艺,选用适宜针布,减少纤维损伤;并粗正确配置牵伸工艺,控制速度,对胶辊进行涂料处理;细纱采用新型上销、优质钢领钢丝圈;络筒适当降低速度、合理设定清纱工艺参数等工艺技术措施,最终顺利纺制出有机棉/竹浆/WinCool 75/25/10 8.3 tex混纺纱,并达到了产品开发的质量要求。     

The effect of O2 enrichment on NOx formation in biomass co-fired pulverised coal combustion

Oxygen enrichment of the combustion air in pulverised coal combustion for power plant is seen as a possible retrofit measure to improve CO₂ scrubbing and capture. This technique produces a reduced volume of flue gas with higher CO₂ concentration than normal air combustion that will contributes to the enhancement of amine scrubbing plant efficiencies. We report in this article the results of a study at the small pilot scale into the effect of these combustion modifications on the formation of NO_x and associated carbon burnout changes. Experiments were performed using a Russian coal, typical of that used in some UK power stations with shea meal and Pakistani cotton stalk as biomass fuels co-fired at a fraction of 15%th. The down-fired pulverised coal combustor was operated at 20 kWth under air-staged conditions for NO_x control and the secondary and over-fire air flows were both enriched by up to 79% (100% O₂) for a range of splits giving a 35% overall O₂ concentration for full enrichment. When the same enrichment process was applied to biomass/coal combustion different behaviour was observed with respect to NO_x formation. We have shown that oxygen enrichment can achieve benefits of improved carbon burnout with a positive impact on NO_x emissions over and above the primary aim of increasing CO₂ concentration in the flue gas for enhanced capture efficiencies. With all other conditions of overall stoichiometry, OFA levels and O₂ enrichment levels remaining the same, NO_x levels at 22% OFA initially increased over the range of secondary air enrichment, particularly for shea meal/coal co-firing. At 31% OFA the trends were to lower NO_x at high enrichment levels. However, co-firing with shea meal initially showed an increase in NO_x emission at lower levels of enrichment (up to 40% O₂) followed by overall lower NOx emissions at 100% O₂ in the secondary air. The results show that NO_x emissions can either increase or decrease depending on the operating conditions. The differences in behaviour are attributed, not only to the effects of enrichment on the stoichiometry of the near-burner zone, but also on the flame dynamics and intensity of combustion related to the associated reductions in gas velocity and swirl intensity by the transition from air to pure O₂ in the secondary oxidant stream.     

低温促染剂TW-NALD在羊毛织物染色中的应用

采用低温促染剂TW-NALD在沸染和低温条件下对羊毛织物进行染色,结果表明:采用低温促染剂染色,可提高织物的K/S值;低温染色的色牢度达到常规沸染的标准;用低温促染剂沸染,能相应提高色牢度0.5～1级.     

电晕法处理超高相对分子质量聚乙烯纤维

用电晕法对超高相对分子质量聚乙烯纤维进行了表面处理。利用DPPH检测纤维表面自由基的产生和变化，并用XPS表面元素分析、SEM等方法探讨了纤维表面性能处理前后的变化。实验发现，通过电晕处理后，纤维复合材料的抗剪切强度从未处理的5．98MPa提高到14．3MPa。     

耐酸性荧光增白剂在棉织物上的应用

本文比较了增白剂4BK，Argaphor MST liq.,Argaphor RSB liq.的色光、白度、耐酸性等应用特性，说明Argaphor MST liq.和Argaphor RSB liq.有良好的耐酸性和应用性能。     

3D woven composite design using a flattening simulation

Fiber composite materials have unique, advantageous mechanical properties that have made them highly desirable in a range of industries. In particular, 3D woven-fiber composites are highly resistant to delamination compared with laminated 2D woven-fiber composites and have been adopted in various advanced products. This paper focuses on the design of 3D woven-fiber composite products and proposes a flattening simulation method for designed 3D models with constant thickness. The proposed method estimates the shape of a flat material and the fiber directions in the 3D model design; deformation phenomena of 3D woven-fiber materials are also considered in order to improve the accuracy of the proposed method. CT images are used to compare the simulation results with the actual deformation of 3D woven-fiber materials and confirm the ability of our method to effectively design the fiber direction base on the 3D model and to estimate the shape of flat materials.     

中温低碱短流程练漂新工艺研究

本研究以氧化退浆剂应用为基础。进行中温低碱短流程练漂新工艺研究，突破了传统的重煮轻漂工艺的格局，为实现环保练漂作了有益的尝试。     

棉纺织厂设备维修方式的实践

分析了周期计划维修存在的问题，提出采用状态计划维修，并将状态计划维修分为日常点检、计划检修、定期修理、专项维修等项目，说明状态计划维修不仅可以节约用工、节约机物料消耗，而且提高了设备的运转率，并使产品质量稳中有升。