大庆乙烯新区装置工艺特点分析

大庆乙烯新区装置采用了前脱丙烷、前加氢以及乙烯机开式热泵等节能工艺,使装置总能耗降低。由180 kt/a改造为270 kt/a的过程中,充分利用原有设施,降低投资。     

选煤厂中矸仓下加热装置的设计与计算

在重介选煤工艺设计中,中煤和矸石通过脱介筛后不再进一步脱水,直接进入中煤仓和矸石仓,这样中矸仓下的扇形闸门处存在一定量积水。在冬季会由于结冰而导致闸门不能正常打开,为生产带来不便。针对此问题提出了简单实用的加热装置设计方案,根据传热学理论对加热装置的散热功率进行计算,从而确定该装置的加热功率。实践证明,加热装置在现场应用取得了良好效果。     

300kt/a低压氨合成技术应用总结

详细介绍了300 kt/a低压氨合成装置的系统配置、催化剂装填、催化剂升温还原、生产运行等情况。低压氨合成装置投运后,各项工艺指标均较为理想,表明GC型低压氨合成技术较为成熟、稳定、可靠、先进。     

Microwave irradiated and thermally heated olive stone activated carbon for nickel adsorption from synthetic wastewater: A comparative study

In attempt to compare the removal efficiency and yield of the activated carbon prepared using the conventional and microwave‐assisted heating is the focus of this work. Toward this olive stone (a biomass precursor) is activated using the popular activating agent potassium hydroxide. The process optimization exercise is carried out by using the standard full factorial statistical design of experiments (response surface methodology). The activated carbons prepared under the optimized conditions are compared based on the adsorption capacity and yield. The adsorption capacity was found higher using microwave heating as compared with conventional heating. The microwave heating requires significantly lesser holding time as compared to conventional heating method to produce activated carbon of comparable quality, with higher yield. The BET surface area of carbon using microwave heating is significantly higher than the conventional heating. Although the mesopore surface area of carbon is not vary significantly, the activation time, power, and nitrogen gas consumption are significantly lower than the conventional heating rendering that the activation process via microwave is more economical than that via conventional heating. The adsorption isotherm data fitted the Langmuir isotherm well and the monolayer adsorption capacity was found to be 12.0 and 8.42 mg/g for microwave and thermally heated activated carbon, respectively. Regeneration studies showed that microwave‐irradiated and thermally heated olive stone could be used several times by desorption with an HCl reagent. Both carbons can be used for the efficient removal of Ni²⁺ (>99%) from contaminated wastewater. © 2013 American Institute of Chemical Engineers AIChE J, 60: 237–250, 2014     

碳纤维织物电阻特性研究

研究碳纤维织物的电阻特性对于指导加热抗冰复合材料研究具有重要意义。本文研究了长度、宽度、铺层数等参数对T300碳纤维织物的电阻特性的影响规律,并对比分析了浸入树脂后的复合材料与碳纤维织物的电阻变化规律。研究表明,电阻与碳纤维织物的长度呈线性增大关系;电阻与碳纤维织物的宽度和铺层数呈非线性减小关系,不同于常规导体的反比关系;浸入树脂会使碳纤维织物电阻减小约0.1Ω,通常可以忽略不计。     

极软岩回采巷道支护技术研究

软岩巷道是巷道支护的难题之一。据具体的工程实例,分析认为巷道变形严重的主要影响因素是围岩岩性、支护整体结构和自身承载能力。基于原支护存在的问题,提出了＂U型钢可缩性支架＋锚网喷＂的互补支护技术方案。实验结果表明,该技术取得了良好的治理效果,巷道围岩变形量明显降低,保证了巷道的正常运行。     

捣固焦炉煤饼高度与加热制度关系的研究

根据炼焦过程热的传导机理及捣固焦炉炉体特性,对捣固焦炉实施平台炉温管理,采用加热制度调整入炉煤饼高度方法,使焦炭达到均匀成熟的同时,提高了捣固焦炉产量。在一定温度范围内,升高标准温度,可提高捣固焦炉煤饼高度。生产实践表明,平台炉温制度和入炉煤饼形态操作法符合捣固焦的炉体特点,是一种具有实用性和推广价值的炉温控制操作技术。     

蒸汽间接加热法液氯连续汽化系统的设计

介绍了2种液氯汽化技术——蒸汽间接加热法和热水间接加热法,分析了热水间接加热法的缺点,详细阐述了设计的蒸汽间接加热法的工艺流程、自动控制及安全系统。     

循环水余热回收供暖分析与研究

从技术、经济和发展3个方面对利用河北盛华化工循环水余热供暖方案进行了分析。通过对循环水的特点及供暖的需求进行分析,为＂利用热泵技术提取循环水中的热量替代蒸汽加热供暖方案＂提供了设计依据,并进一步对循环水余热供暖进行了经济性分析。     

轮胎硫化余热的回收与利用

轮胎硫化过程中有部分高位蒸汽冷凝后直接排八大气,凝结水温度冷却过程中存在大量热量损失。余热回收系统是将硫化排放的余热回收,并将回收的热量充分利用,冬季用于车间（或办公室）供暖,夏季通过制冷机取低温水,为挤出线冷却装置提供低温水（或成型车间提供制冷空气）,从而达到节能降耗的目的。