Analysis of the Disintegration of Distiller's Spent Grain Compacts as Affected by Drying in Superheated Steam

Breaking and disintegrating of biomass compacts while they are being dried in superheated steam (SS) is a common problem observed during the initial stage of SS drying. The present work investigated the moisture and temperature changes, volume and density variation, crushing resistance, and tensile strength of single cylindrical compacts produced from wet distiller's spent grain (WDG) under SS drying conditions. The wet compacts were dried in SS at 110, 130, and 150°C with SS velocities of 0.9, 1.1, and 1.4 m/s. For a specific temperature and velocity, the compacts were exposed to SS for time periods of 5, 120, 300, and 600 s and the changes in physical properties were analyzed. An increase in a percentage increase in volume by 78–130% and a decrease in density by 51–61% were observed as a result of drying the compact in SS. The results obtained from the study were compared with hot-air dried compacts for 600 s, indicating that SS drying had a substantial role in stimulating the relaxation of stresses stored in the compacts as compared with a convection hot-air drying process.     

余热锅炉蒸汽流量的温度压力补偿及在DCS系统中的实现方法

将"IFC-1967公式"用于水蒸汽流量的温度压力补偿,可以保证企业精确测量及统计蒸汽流量和累计用量。利用DCS系统提供的结构化文本编程组态方式,将IFC-1967公式写入到系统,并封装成通用功能块,在DCS系统中实现了对余热锅炉过热蒸汽流量的准确测量。     

葡萄糖注射液灭菌工艺验证性方案设计

目的验证葡萄糖注射液的灭菌工艺。方法通过对灭菌柜空载热分布实验、满载热分布实验和生物指示剂试验进行验证同时考察产品无菌状态以及主成分的变化。结果灭菌柜能够提供预定的灭菌条件,葡萄糖注射液经过灭菌操作后无菌检查合格,且其主成分改变很少。结论葡萄糖注射液通过灭菌验证。     

我国油田废水处理工艺的现状及研究进展

油田废水处理中包括回注水处理,稠油油田采出水回用注汽锅炉处理,油田外排水处理三大应用方向。本文从油田回注水除油除悬浮物,稠油废水阻垢缓蚀、脱硫消毒,生物法处理油田外排水几个方面介绍了国内外油田废水处理的新技术、工程实例及发展方向。     

注N_2对原油性质及组成的影响研究

对注N2后原油性质及组成变化进行分析研究,研究表明地层注入N2较难达到混相,属于非混相驱;注气后饱和压力上升快,原油体积系数增加,但增加量逐渐变小,依靠氮气增溶驱油的效果受到一定影响;N2对原油中轻烃组分有一定的抽提作用,导致原油变重,可能会形成沥青质沉淀而影响原油的流动能力。     

稳定性ClO_2在电厂汽机循环冷却水处理中的应用

阐述了稳定性二氧化氯安全、高效、无毒的杀菌特性。通过其在鞍钢新钢铁齐大山铁矿热电分厂工业应用试验表明,稳定性二氧化氯杀菌剂基本不影响汽机循环冷却水pH值,杀菌率高,作用快,对汽机凝汽器铜管几乎无腐蚀作用,对膦系水质稳定剂无副作用,在电力行业的汽机循环冷却水处理中具有广阔的使用前景。     

蒽醌法生产双氧水的节能改造

蒽醌法生产双氧水的蒸汽消耗较高。为了降低产品的单位能耗,通过对冷凝水回收系统、蒸碱系统及工作液换热系统等的改造,使蒸汽冷凝水的热量得到回收再利用,从而使产品的蒸汽单耗下降40 kg/t,节省了生产成本。     

滑动弧放电等离子体法用于二甲醚重整制氢简

Gliding arc gas discharge plasma was used for the generation of hydrogen from steam reforming of dimethyl ether （DME）. A systemic procedure was employed to determine the suitable experimental conditions. It was found that DME conversion first increased up to the maximum and then decreased slightly with the increase of added water and air. The increase of total feed gas flow rate resulted in the decrease of DME conversion and hydrogen yield, but hydrogen energy consumption dropped down to the lowest as total feed gas flow rate increased to 76 ml. min^-1. Larger electrode gap and higher discharge voltage were advantageous. Electrode shape had an important effect on the conversion of DME and production of H2- Among the five electrodes, electrode 2# with valid length of 55 mm and the radian of 34 degrees of the top electrode section was the best option, which enhanced obviously the conversion of DME.     

硫化工艺对轴箱弹簧硫化内压及性能的影响

以轴箱弹簧产品为例,研究了填胶量及硫化温度对轴箱弹簧的硫化内压以及刚度等性能的影响。结果表明,随着填胶量的增加,硫化内压增大,橡胶的交联程度及致密度增大,产品刚度增大;随着硫化温度的升高,硫化内压先迅速增大后有所降低,对产品的刚度影响不明显。     

料浆法磷铵生产乏汽的利用

通过改造利用磷铵生产中反应-蒸发浓缩产生的低位热能乏汽(80~90℃)替代蒸汽完成料浆浓缩、液氨蒸发任务,同时降低末端温度至20~50℃,从而使氨化反应机料浆浓缩的低位热能得到综合利用。改造后节约低压蒸汽4 t/h,全年节标煤2 851.2 t。