玻璃生产设备现代化管理的措施

阐述了设备在玻璃生产线中的重要地位,重点介绍了加强设备全员管理的措施,在如何创建设备的管理体系、根据设备特点进行科学的维修、创新现代设备的管理水平、发挥设备的综合效率等方面指出了自己的看法。强调了通过完善管理理念、目标,加强有效的监控手段,积极建立激励机制,促进全员工参与实施的积极性,就能实现设备效率最大化。     

THE EXACT ERROR IN ESTIMATING THE SPECTRAL DENSITY AT THE ORIGIN

Abstract. This paper derives expressions for the exact bias and variance of a general class of spectral density estimators at the zero frequency, building on the work of Neave (The exact error in spectrum estimates. Ann. Math. Statist. 42 (1971), 961–75) who studied the case where the mean of the series is assumed known. These expressions are evaluated for 15 different windows and for a wide variety of stationary time series. The exact error of the estimators is found to depend on whether the sample mean has to be estimated, and some windows are noticeably inferior at certain values of the bandwidth. A response surface analysis reveals that the finite sample relationships between the bandwidth and the exact error are quite different from the ones suggested by asymptotic theory.     

催化裂化装置柴油系统腐蚀原因分析

陕西延长石油延安炼油厂现有一套1.0MMTA催化裂化装置,主要处理常压渣油。在装置运行过程中,发现分馏塔柴油系统出现了较为严重的腐蚀现象,其中柴油系统工艺管线、冷却设备因腐蚀穿孔多次出现泄露情况,对装置的安全平稳运行带来了严重影响。本文主要根据装置的腐蚀情况,分析了装置产生腐蚀的主要原因,初步探讨了腐蚀产生的机理,并根据实际生产过程中的经验,提出了一些可行性的预防措施。     

Advances in reduction of NOx and N2O1 emission formation in an oxy-fired fluidized bed boiler

Fossil fuel combustion is one of the major means to meet the mounting global energy demand. However, the increasing NO_x and N₂O emissions arising from fossil fuel combustion process have hazardous effects. Thus, mitigating these gases is vital to attain a sustainable environment. Interestingly, oxy-fuel combustion in fluidized bed for carbon capture and minimized NO_x emissions is strongly sustainable compare to the other approaches. It was assessed that NO_x formation and fuel-N conversion have significant limitation under oxy-fluidized bed compared to air mode and the mechanism of NO_x formation is still deficient and requires further development. In addition, this review paper discussed the potential of primary measure as low emission process with others supplementary techniques for feasible NO_x reduction. The influences of combustion mode, operating parameters, and reduction techniques such as flue gas recirculation, oxygen staging, biomass co-firing, catalyst, influence of fluidized bed design and structure, decoupling combustion and their merges are respectively evaluated. Findings show that significant minimization of NO_x emission can be achieved through combination of primary and secondary reduction techniques.     

PTA大料仓变形的原因及措施

介绍了PTA大料仓结构,合纤公司及洛阳分公司下料、送料方式,分析了聚酯装置3台PTA大料仓变形的原因。A,B料仓变形原因为PTA架桥,大料仓氮气补充设备故障,料仓顶部呼吸阀不动作或动作不及时,C料仓变形原因是PTA架桥。对A,B和C料仓分别采取相应的措施。     

加氢裂化装置开停车节能减排措施

分析了扬子石化芳烃厂加氢裂化装置开停车中的物耗、能耗,介绍了2014年装置检修开停车节能减排措施,即合理设置流程减少氢气排放、密封蒸煮降低现场异味、利用密度差最大化回收物料、利用开工蒸汽喷射泵减少氮气用量、利用重整氢进行氢气气密以及维持反应器器壁温度等,这些节能措施的实施不仅在开停车过程中减少了物料的排放、燃料和氮气的使用量,而且大大降低了现场异味、缩短了开车时间,取得了良好效果。     

循环氢压缩机叶轮开裂分析原因及处理措施

某厂加氢裂化装置在大检修后开工过程和运行阶段期间,循环氢压缩机K102第二级叶轮连续出现两次开裂,导致联锁停运,严重影响整个装置的运行,也对整个公司的物料平衡产生了极大的影响。所以我们针对此现象从压缩机叶轮的材质、制造工艺以及工艺气的腐蚀等方面影响进行了原因分析,并针对相关的原因做出了一系列相应的处理措施以及总结了很多宝贵的经验教训,为了解氯离子对压缩机叶轮腐蚀有了更深入的思考。     

纺织品防螨研究进展

主要介绍了尘螨的相关知识及其危害,重点介绍了纺织品防螨技术的研究进展及其防螨纺织品的效果评价方法。     

陕西煤灰纱出现的特征性规律与防治

煤灰纱严重影响纺织产品质量,同时也是难以解决的技术问题。文章分析了煤灰纱出现的特征性规律,试图找到防治煤灰纱的措施,从而找到切实可行的技术解决途径。     

受限空间安全作业管理浅析

受限空间因受作业场所限制,存在的危险因素较多,受限空间安全管理控制措施为:建立许可制,落实责任和措施,做好受限空间作业人员的个体防护,对受限空间作业的安全管理要实行从审批到应急处理全过程的控制。介绍了受限空间的危险特点和事故类型,提出了受限空间作业安全管理的具体措施。