The model can satisfactorily predict commercial operation results with regard to the edc conversion , vcm selectivity , pressure and temperature at the outlet of reactor coil 与工业数据比较后发现，炉管出口的转化率、选择性、出口压力和温度等数据与模型预测值一致，表明模型具有较高的可信度。
Oven pipes , sheet iron ware or sheet metal works are only some things , which belong to the area of activity of wilhelm schmidt & sohn gmbh & co . kg Kg是一家现代化的、可靠的产品供应商，这家供应商从事钢板制备,白铁制品、板件、冲压件,炉管、烟道的制造、销售。请您访问我们的主页，垂询当前的信息和服务。
Abstract : a digital automatic ultrasonic testing system developed for stovetubes of petrochemistry was introduced including the choice of the angle of a transducer and the grading of tubes 文摘:介绍自行研制的透射式数字化炉管超声自动检测系统及检测结果，并对超声探头的入射角选取和炉管的分级进行了探讨。
Adopting the " expand in frequency domain " theory , not the linear prediction in phase space reconstruction algorithms , the reductive computing of boiler tube leak signal is done and validated by experiments 舍弃了传统相空间重构的过程中的线性预测模式，采用“频域拓展”的方法，对炉管泄漏声信号进行了还原计算，并通过实验进行了验证。
Through overall inspection , analysis and study on the saddle welding beam defect of lower gas - holding pipes , the cause of the defects was found and prediction was made on the residual life of furnace pipes , and repairing suggestion was given as well 摘要通过对下集气管马鞍焊缝缺陷进行全面的检测、分析、研究，查清了缺陷产生的原因，预测了炉管的剩馀寿命，并提出了修复使用的建议。
None of the 560 reformer tubes requires replacement at this stage , but the 6 nipped tubes should be removed and plans put in place to replace these and approximately 16 other tubes , nearing the end of their life through creep , at the next shut down 在本阶段， 560根转化炉管都不需要更换，但是有6根已经掐断的管应该被移走，还有大约16根其他的管子寿命也快到终点了，计划在下次停车的时候进行更换。
1 . temperature measurement surface thermocouple with protective tube directly welded on the surface of furnace pipe to avoid scouring from extremely flow velocity and damage to measuring element at high temperature , also corrosion to the thermocouple from hydrogen and sulfur 1 .一种带护套管测温表面热电偶，护套管直接焊在炉管表面，避开了高流量冲刷，高温温度对测温元件的破坏，氢硫对热电偶的腐蚀
Based on the present domestic and international actualities , this paper makes in - depth experiments for the technology of boiler tube leak detection and diagnosis , and develops the system of the boiler tube leak detection and diagnosis 本文在充分研究了国内外现状的前提下，对锅炉炉管泄漏检测与诊断技术进行了深入的理论与实验研究，开发了锅炉炉管泄漏检测与诊断系统，研究的主要内容包括以下几个方面。
In the light of hydrogen manufacturing coverted furnace tube system ( including conversion tube , gas gathering tube and pigtail tube ) occuring weld fissure during manufacture and installation , the reason of fissure is analized . the repair plan and specific repair measures are recommended 针对制氢转化炉管系(包括转化管、集气管、猪尾管)在制造安装过程中出现焊接裂纹的原因进行了分析，并介绍了缺陷的修复方案和具体修复措施。
These are the main contents : the characters in time domain and frequency domain of the background noise inside boiler are analyzed theoretically and studied by experiments , and the upper limit frequency of it is confirmed , these are very important to the diagnosis of boiler tube leak and avoid wrong alarms 对炉内背景噪声的时、频域特性进行了理论分析与实验研究，确定了炉内背景噪声的上限频率，这对炉管泄漏的诊断和防止误报警具有重要意义。
