气化炉废锅查漏总结

介绍气化炉废锅泄漏后,对废锅的查漏、消漏。     

EDXRF应用于古陶瓷科技鉴定的实验条件探讨

能量色散X射线荧光分析法(EDXRF)是目前古陶瓷科技鉴定中应用最广泛的成分测试技术之一。在应用该法进行古陶瓷科技鉴定时,由于不同研究者所选择的分析测试条件不同,测试数据会出现一定的差异性,严重的甚至导致截然相反的结论。有鉴于此,本文对EDXRF应用于古陶瓷科技鉴定的实验条件进行了分析探讨,为建立统一的测试标准,实现数据的通用性打下基础,以提高成分鉴定法的准确度和可信度。     

承内外压复合材料方管的加强筋结构设计

采用加强筋可提高复合材料方管在内外压下的抗变形能力,但目前对于加强筋的结构设计研究不足。针对复合材料方管,采用ANSYS软件研究了3种结构的加强环筋（1T型空心加强筋、U型空心加强筋和实心加强筋）对复合材料方管变形的约束能力。制作了5件复合材料方管试样,并测试了其受内外压下的最大变形。结果：采用竹型空心加强环筋的复合材料方管具有最小的变形。在内压0．02MPa下测得最大变形为3．7～4．1mm,在外压0．01MPa下测得最大变形为4．5—4．7mm,试验结果与有限元分析结果基本一致。表明：竹型加强环筋更适合于方管筒身段的加强,方管的最大变形均未超过高强玻璃纤维的弹性变形。     

X-ray investigation of sintered cadmium doped hydroxyapatites

Pure and cadmium (Cd) doped hydroxyapatites (HA, Ca₁₀(PO₄)₆(OH)₂) were synthesized by a precipitation method from aqueous solutions of Ca(NO₃)₂4·H₂O for the former and Cd(NO₃)₂4·H₂O for the latter, by using (NH₄)₂HPO₄ as the phosphate source, while pH was kept in the range of 11–12. The effect of incorporation of Cd²⁺ ions into the structure of HA was investigated after the air sintering at 1100 °C for 1 h. The results indicate that Cd²⁺ addition into HA yields nearly fully densified products with respect to pure stoichiometric HA. The XRD patterns showed that Cd doping increases the crystallinity of HA. The 2, 4.4, and 8.8 mol% Cd doped HAs had calcium oxide (CaO) impurity phase in their lattice. The CaO phase in the HA structure gradually disappeared with increasing Cd amount, and was replaced with cadmium oxide (CdO) in the CdHA doped with 11 mol% Cd. Cd²⁺ ion incorporation decreased the a- and c-axis lattice constants and unit cell volume of HA.     

采用折叠扁管与挤压扁管的微通道换热器长效特性

对采用折叠扁管与传统挤压扁管的微通道换热器长效特性进行了对比研究。分别进行了标准盐雾腐蚀实验,对比腐蚀前后两个换热器样品的换热量、空气侧压降和总热阻变化情况,结果表明,折叠扁管的样品在腐蚀后的各项性能均优于挤压管的样品。传统挤压扁管样件的翅片与扁管连接处率先被腐蚀破坏,14 d腐蚀后就可观察明显的翅片脱落现象,且在28 d腐蚀后挤压扁管上出现泄漏;折叠扁管样件则是翅片率先被腐蚀,而翅片与扁管的连接处没有明显损坏,在49 d腐蚀后折叠扁管没有出现泄漏现象。这是由于折叠扁管能方便地配备保护层,实现牺牲翅片保护扁管的方法,在腐蚀过程中能有效地保护更为重要的扁管。折叠扁管的长效特性优于传统挤压扁管。     

工作场所空气中乙酸测定方法的研究

建立了工作场所中硅胶管吸附空气中乙酸用丙酮解吸后酸性毛细管柱气相色谱（ FID）测定乙酸的方法。通过测试该方法的精密度、准确度、解吸效率,结果令人满意,结果表明本方法适用于工作场所中空气中乙酸的测定。     

吹风气潜热回收系统检修及工艺调整经验总结

分析吹风气潜热回收锅炉副产蒸汽产量下降的原因。利用大修机会,采取清除燃烧炉、烟道、静电除尘等系统积灰,更换对流管,检修后调整工艺指标等措施,降低系统阻力,提高锅炉产汽量。     

铁路油槽车不同类型装卸油鹤管运行工况分析

目前大部分石油产品均采用管道输送方式进行外输,但由于受地理位置的限制及各地区对能源需求的波动性,部分油品还需配合铁路油罐车输送方式实现外输。当装卸油品时,鹤管类型及数量影响着管内油品的运行参数,应用软件对不同直径鹤管在装卸油品时的各参数进行数值模拟,通过分析鹤管、集油管及输油管内油品的压力、速度等参数的变化,为铁路装卸油品提供技术服务及理论支持。     

含沟槽腐蚀缺陷油管的剩余强度评价

沟槽腐蚀多见于油气田生产系统中,对安全生产造成极大的影响。通过API 579剩余强度评价方法,对缺陷尺寸及油管受力进行分析,不仅可以较为准确的判断含沟槽腐蚀缺陷油管的应力状态,对危险管段进行补强和维修,保证油气田的安全生产;还能避免不必要的管段维修及更换,对降低生产成本、提高经济效益有重要的意义。     

Syntheses and Structural Characterization of Co(II) Coordination Polymers Supported by Bis(<Emphasis Type="Italic">N</Emphasis>-benzimidazolyl)methane and Bis(<Emphasis Type="Italic">N</Emphasis>-imidazolyl)methane

[Co₂(L¹)₂(NCS)₄]·4MeOH 1, [Co(L²)₂(H₂O)₂](Sal)₂·4H₂O (Sal = salicylate) 2 were obtained from self-assembly of the cobalt salts with bis(N-benzimidazolyl)methane (L¹), and bis(N-benzimidazolyl)methane (L²), and their structures were characterized by IR and X-ray diffraction analysis. Complex 1 exhibits a two-dimensional grid structure, whereas complex 2 is a coordination polymer having a one-dimensional linear chain structure. The grid in 1 lies parallel to the crystallographic ab plane and exhibits intra-grid M–M separations of 10.508 × 10.508 Å. Hydrogen bonds hold the cationic chains in 2 together leading to a three-dimensional network structure.