合成氨废热锅炉制造工艺改进

废热锅炉是Cassle合成氨技术中的关键设备,本文以某改造项目Cassle技术废热锅炉为研究对象,阐述了废热锅炉的结构特点,结合化工厂反馈的问题,针对关键工序提出了改进措施,为制造类似结构和要求的产品积累了宝贵经验。     

国外某电解脱脂机组改造工艺及设备特点

针对某电解脱脂机组生产效率低、停机时间长、带钢清洗质量不稳定等问题,分析了该机组工艺设计和装备缺点,并提出了相应改造方案。生产实践表明:改造后的机组运行稳定,机组产能、带钢清洗质量、介质排放等各项指标全部达到或超过了合同规定的保证值要求。     

Recent advances in the performance of Co-Current gasification technology: A review

The Co-Current reactor gasifier is a promising technique, owing to its good performance and less residue content. Even though it can be used only for low moisture feedstock, it is needed improvement by incorporating modifications in the design of reactor, feeding system, air supply system, preheating air or feedstock, discharge system, recirculation technique, and co-gasification. Many of the researchers found that various improvement methods have been done to improve the performance of the gasifier at different operating condition. Therefore, in this paper a detailed review has been made to study about that developments of Co-Current gasifier and their effects on the performance of the gasifier. Further to improve the performance a suitable method for the gasifier is identified. A comparision with various methods reveals that design modification showed better performance, higher producer gas yield and less pollution.     

Improvement of photobiological hydrogen production in Chlorococcum minutum using various oxygen scavengers

The depletion of non-renewable energy resources such as fossil fuels urge the human society to concentrate more on renewable energy including production of biological hydrogen (H₂) from algae. Biological hydrogen or biohydrogen is one of the cleanest and efficient alternate energy sources for human needs. It is a well-known fact that hydrogenase (H₂ase) will work in anoxic condition which is the key enzyme in H₂ generation from photosynthetic algae or advanced plants. Keeping in view the significance of anoxic condition, the present study deals with screening of three oxygen scavengers/removers such as sodium sulfite (Na₂SO₃), sodium metabisulfite (Na₂S₂O₅) and sodium dithionite (Na₂S₂O₄) individually along with universal tris-acetate-phosphate (TAP) medium for improvement of biohydrogen production in green alga Chlorococcum minutum (C. minutum) under in vitro conditions. To the best of our knowledge, for the first time improvement in hydrogen production was achieved using sodium sulfite and sodium metabisulfite individually with algal cultures. Efficient photobiological H₂ production was observed at 24 h in C. minutum in the presence of all the three oxygen scavengers when compared to untreated samples via limiting the oxygen levels but output was more with sodium sulfite treatment. Particularly 0.8 mM Na₂SO₃ is best for enhancement of H₂ production at 24 h when compared to other two scavengers and this may be due to high oxidation state and more electron negativity of this compound. Apart from augmentation in H₂ production in this species, present screening may also be helpful for researchers working in the area of biological H₂ generation.     

浅谈企业内部质量审核

针对企业内部质量审核，指出了内审的原则及有效措施，以利于提高内部质量审核水平。     

沙曲选煤厂技术改造方案探讨

针对沙曲选煤厂、旧系统存在问题,对选煤工艺改造方案进行探讨,即采用预脱泥有压两产品重介旋流器主再洗、毛煤动筛排矸、浮选精煤加压过滤机回收、尾煤压滤回收工艺.通过试运行,设备状况良好,基本达到设计生产能力.     

胶体级凹凸棒石粘土的生产工艺研究

在总结了胶体级凹凸棒石粘土的生产技术基础上 ,结合实际提出了两种干法加工工艺 ,给出了工艺参数 ,并对添加Mg(OH) 2 或MgO以及挤压提高凹凸棒石粘土造浆性能的机理作出了分析。     

煤泥水浓缩系统技术改造

霍州煤电集团辛置洗煤厂,于2002年经过重介技术改造,各项指标均达到规定要求,但随着重介生产能力的逐渐提高,煤泥水系统、澄清工艺已无法满足重介分选时要求的清水作业.因此,经过分析工艺要求和生产现状,提出改造方案,改进了煤泥水系统工艺流程.改造后,满足了重介分选清水作业的要求,入洗能力显著提高.     

偏载受力状况下单体支柱构造的改进

针对在偏载受力状况下单体液压支柱漏液问题，对其构造进行了分析、改进，合理地解决了漏液问题，保证工作面的正常生产。     

西曲矿选煤厂介质分流机构的改造

介绍了西曲矿选煤厂对原来分流机构的改造，将原来的分流箱改成了分流管，取得了显著效果，解决了因为分流箱执行机构动作不灵而致使分流效果不佳的问题。