高压低温先导式安全阀的设计

介绍了一种某试验系统用高压低温先导式安全阀,主要从工作原理、结构特点、材料的选用、结构特点、试验等方面进行阐述。     

漫谈钢铁企业用空分装置的流程选择

钢铁企业的氧气厂要深入了解本企业的用氧情况及周边市场的需要，据此确定拟新增空分装置的设计参数，选定最适宜的空分流程。探讨了空分流程选择时要考虑的几个方面。介绍了一种对空分装置的投资和长期运行费用之间进行经济性分析的定量计算公式，并得出了四点结论。     

Heat transfer of a row of three butane/air flame jets impinging on a flat plate

Experiments were performed to investigate the heat transfer characteristics of a row of three premixed, laminar, butane/air flame jets impinging on a water-cooled flat plate. The between-jet interference was found to reduce the heat transfer rate in the jet-to-jet interacting zone due to the depressed combustion. The interference became stronger when the jet-to-jet spacing and/or the nozzle-to-plate distance were/was small. The positive pressure existed in the between-jet interacting zone caused the asymmetric flame and heat transfer distribution of the side jet. The meeting point of the spreading wall jets of the central and the side jets did not occur at the midpoint of the neighboring jets, but at a location shifted slightly outwards. The maximum local heat flux and the maximum area-averaged heat flux occurred at a moderate nozzle-to-plate distance of 5d with a moderate jet-to-jet spacing of 5d. The lowest area-averaged heat flux was produced when both the jet-to-jet spacing and the nozzle-to-plate distance were small. Comparing with a single jet under the same experimental conditions, the heat transfer rates in both the stagnation point and the maximum heat transfer point were shown to be enhanced in a row of three-jet-impingement system. The present study provided detailed information on the heat transfer characteristics of a row of three in-line impinging flame jets, which had rarely been reported in previous study.     

一体化工作站在大气污染监测系统的应用

介绍工业污染源大气污染物排放连续监测系统的系统结构和应用范围。重点讨论一体化工作站在此系统中实际应用和性能特点。     

以外供液氮替代膨胀机的深度冷冻循环

介绍空分制氮装置采用膨胀机循环与液氮循环的两种工艺流程及能量平衡 ,示出了两种循环的实例比较。指出外供液氮可以作为冷源替代膨胀机 ,且单耗低、操作更方便 ,设备维护量更小、氮气提取率更高     

济钢120t转炉二次烟气除尘设计

济钢120t转炉二次烟气除尘设备选用长袋低压脉冲除尘器,风机采用液力偶合器,并设计将加料系统除尘风量直接加入转炉二次烟气除尘系统。系统投产后,每炉钢节电1200kW,烟气排放浓度为47mg/m3,烟气温度在110℃以下。实践证明,该系统具有节能、捕集率高、排放浓度低、自动化程度高等特点。     

炼钢中间包塞棒液压伺服比例控制系统的应用

济钢第三炼钢厂中间包塞棒液压伺服比例控制系统采用伺服比例阀和伺服缸等,系统设计完善,功能齐全,可实现塞棒位置的闭环控制,保证了结晶器中钢水液面的稳定。     

燃气红外线辐射器的节能与环保特性分析

论述了燃气红外线辐射器的基本原理 ,对其节能与环保特性的分析表明 :与大气式燃烧器相比 ,红外线辐射器的燃料节约率为 15 %～ 45 % ,CO2 排放量减少率为 15 %～ 48% ,CO排放量减少率为 96.2 %～ 97.7% ,NOx 减少率为 94.9%～ 96.9% ,具有显著的节能与环保效果     

高温陶瓷窑炉内影响N0x生成若干因素分析

简要分析了燃料燃烧过程中NOx的生成机理,从陶瓷工艺角度着重讨论了燃料特性、过剩空气系数、一次风率、二次风率、燃烧温度以及烟气停留时间等若干因素对NOx生成的影响.     

应当规范排(进)气阀的生产

输、配水管网因排气不畅而引发气爆型水锤，从而导致爆管的事故时有发生，经补救后再次发生爆管事故的也并不鲜见。近年来，我国的长距离、大口径管道输水工程快速发展，管道输水的排（进）气设计和排（进）气阀的规范生产问题应当引起重视。文中列举了有压管道输水系统中气体产生的原因、赋存形态和危害，对规范排（进）气阀的生产提出了建议。