石英砂物料气流冲击粉碎效果影响因素分析

通过对石英砂物料在不同实验条件下的粉碎结果分析，论述了流化床式超细气流粉碎机工艺参数对产品粒度的影响。     

Preparation and IVIVC evaluation of salvianolic acid B micro-porous osmotic pump pellets

Purpose: Salvianolic acid B micro-porous osmotic pump controlled release pellets (SalB-CRPs) with suitable in vitro release profiles and good in vitro and in vivo correlation (IVIVC) were developed.

Method: Extrusion-spheronization was used to prepare the starter cores containing SalB/MCC/Kollidon®CL-SF/Flowlac®100 of 30:40:15:15 [w/w, The formulation composition of SalB immediate-release pellets (SalB-IRPs)] and complexed with lactose. The pellets were subsequently coated with Surelease aqueous dispersion to achieve controlled-release properties. Furthermore, a single-dose pharmacokinetics study was carried out in New Zealand White (NZW) rabbits.

Results: In the starter cores, the lactose content was 25% based on the SalB-IRPs constituent. The optimal coating polymer ratio of Surelease aqueous dispersion and polyvinyl alcohol–polyethylene glycol (PVA–PEG) graft copolymer (EC/PVA–PEG) was found to be 70:30 (w/w, %) with a coating weight of 5%. The prepared SalB-CRPs had similar in vitro release under three different pH release mediums. A good IVIVC was characterized by a high coefficient of determination (r?=?0.9801). The in vivo study indicated that the maximum plasma concentration (C_max) of SalB-CRPs was decreased, peak concentration time (T_max) and mean residence time (MRT) were all prolonged, as that of SalB-IRPs. In addition, the area under concentration–time curve from 0 to 24?h (AUC_0–24?h) and 0 to infinity (AUC_0–∞) were significantly higher, compared with those of SalB-IRPs.

Conclusion: Collectively, these results manifested that SalB-CRPs were likely to be a more suitable formulation in treating cardiovascular disease with improved in vivo retention, decreased plasma drug concentration fluctuation.     

35t/h循环流化床锅炉控制方案

本文介绍SunyPCC800在循环流化床锅炉上的控制方案和应用情况。     

流化槽烘干机烘干高水分油菜籽的试验报告

本试验以研究流化槽烘干机烘干高水分油菜籽的可行性为目的。探讨了油菜籽适烘的干燥介质温度和干燥工艺。通过模拟烘干试验和生产性烘干试验,得出流化槽烘干机烘干高水分油菜籽是可行的;热风温度以控制在160—180℃为宜;种用以不超过140℃为宜。生产性烘干应采取“干燥—迅即冷却”的干燥工艺。油菜籽经高温快速烘干后,对含油量和发芽率等品质基本无不良影响。     

高锌渣配入锌精矿的沸腾炉生产探讨

根据 40kt/a硫酸系列的 30m2 沸腾炉产出焙尘含硫高的问题 ,提出了在入炉锌精矿原料中配入高锌渣的生产方案 ,回收高锌渣和减少焙烧矿杂质含量创造的效益     

循环流化床锅炉返料量减少的问题处理及对策

循环流化床锅炉系统改造后，出现返料风压突然降低以及返料器中基本没有返料的现象，经反复调整仍无效果。停车检修后，对返料风机选型、物料分离系统和返料装置进行了细致排查，发现是由于返料器风帽用错及脱落过多而引起。最后，对循环流化床锅炉分离返料常见的故障进行了简单分析。     

VFB-1000型振动流化床的设计及应用

以ＶＦＢ－１０００型振动流化床为例，介绍了振动流化床在设计与应用过程中应注意的几个问题。实际应用效果良好。     

18m~2沸腾炉采用不定型耐火材料整体浇注

对常规耐火材料高铝砖砌筑与不定型耐火料浇注进行了比较 ,指出后者能缩短筑炉工期 ,炉子整体性结构强度高 ,密封性较好 ,从而改善环境质量 ,并获取可观经济效益     

流化床气化中小龙潭褐煤灰结渣行为

为探索小龙潭褐煤流化床气化过程中的煤灰结渣行为,采用化学成分、扫描电镜(SEM)和X射线衍射(XRD)相结合对小龙潭煤气化炉内残留渣块和不同温度热处理后煤灰的成分、形貌和晶相组成进行了表征和对比分析,并对升温过程中煤灰的矿物质演变进行了研究。结果表明:在小龙潭气化过程中流化床气化过程中渣块形成时铁元素发生了明显的富集,小龙潭气化残留渣块和950℃煤灰的微观形貌和晶相组成基本相同。小龙潭褐煤在流化床气化过程中950℃左右生成低熔点共融物钙长石、钙黄长石和铁钙辉石等是引起结渣的主要因素。     

循环流化床锅炉设计中的磨损问题

循环流化床锅炉的磨损问题一直是锅炉设计中应考虑研究、解决的重要问题；这个问题处理的好坏，直接影响到锅炉的安全稳定运行。