燃气激波吹灰系统的应用

炼化催化装置高温取热炉炉管积灰结垢,导致换热效果差,烟气热量回收率低,严重影响公司的经济效益及催化长周期运行。为此,对催化高炉吹灰系统进行技术改造,采用燃气激波吹灰替代声波吹灰系统,吹灰效率明显提高,满足了装置节能高效生产的需要。     

电厂锅炉的燃气脉冲吹灰装置

针对锅炉积灰问题,决定安装燃气脉冲吹灰装置。经过调试和试运行,证实该种吹灰器吹灰效果良好。     

激波吹灰技术在列管式余热锅炉上的应用

列管式余热锅炉的蒸发器由于管内壁严重积灰,致使排烟温度高、烟囱尾燃。本文介绍了ESW激波吹灰器的工作原理、四大作用,及使用该项技术后企业节约了停炉时间并减少了检修费用。     

吹灰器在CFB锅炉上的应用选择

介绍了济矿鲁能煤电股份有限责任公司阳城电厂DG480T／HCFB锅炉吹灰器系统的设备特性及运行情况,分析了激波吹灰器及蒸汽吹灰器在运行中存在的问题及解决措施,并对吹灰器在大型CFB锅炉的应用进行了探讨,分析两种吹灰器对于清除锅炉尾部烟道受热面积灰、提高受热面换热效果、降低排烟温度以及提高锅炉效率的效果。     

常压加热炉吹灰器顺序控制的实现

介绍利用TPS系统提供的逻辑点及Dis play脚本语言在常减压装置中实现常压加热炉吹灰器顺序控制的方法介绍利用TPS系统提供的逻辑点及Dis play脚本语言在常减压装置中实现常压加热炉吹灰器顺序控制的方法     

浅谈催化装置余热锅炉吹灰器改造

催化裂解装置余热锅炉原蒸汽吹灰器故障率较高,维护工作量较大,同时,余热锅炉排烟温度高,影响锅炉效率。为此,裂解车间决定对吹灰器进行改造,增设燃气激波吹灰设备,改造后取得了良好的经济效益。     

HG1021/18.2型锅炉回转式空气预热器的吹灰器运行状况分析

本文通过对锅炉空气预热器积灰问题的分析,比较蒸汽、声波、燃气3种吹灰器的工作原理及效果,叙述燃气吹灰器的调试和试运行情况。对比燃气吹灰器安装前后的吹灰效果,提出燃气吹灰器能较好地保持回转式空气预热器的洁净,提高经济效益。     

吹灰器在直接管式加热炉上的混合使用

在管式直接加热炉上混合使用声波吹灰器和气动旋转式吹灰器,分别利用其优点,使其达到良好的吹灰效果,满足使用要求。     

GN-JB型模块化智能控制激波吹灰器升级改造

介绍GN-JB型模块化智能控制激波吹灰器技术改造方案、技术创新点和实施效果。     

空气预热器最佳吹灰过程的计算机实现方法

基于空气预热器积灰的在线监测技术和计算机应用技术，确定最佳吹灰时间，利用以最小运行成本为目标函数的最佳吹灰周期模型，提出了对传统吹灰系统改造的计算机实现方法。     

ZC型袋式除尘器清灰机构改造实践

济钢 5t电炉除尘器 ,自投入运行以来 ,经常造成回转臂折断、滤袋“硬壳化”、介质捕集率低等问题。采用极坐标位控清灰机构后 ,彻底消除了清灰机构原有设备故障 ,烟尘捕集率提高到 95 %以上 ,实现了达标排放     

On high explosive launching of projectiles for shock physics experiments

The hydrodynamic operation of the "Forest Flyer" type of explosive launching system for shock physics projectiles was investigated in detail using one and two dimensional continuum dynamics simulations. The simulations were numerically converged and insensitive to uncertainties in the material properties; they reproduced the speed of the projectile and the shape of its rear surface. The most commonly used variant, with an Al alloy case, was predicted to produce a slightly curved projectile, subjected to some shock heating and likely exhibiting some porosity from tensile damage. The curvature is caused by a shock reflected from the case; tensile damage is caused by the interaction of the Taylor wave pressure profile from the detonation wave with the free surface of the projectile. The simulations gave only an indication of tensile damage in the projectile, as damage is not understood well enough for predictions in this loading regime. The flatness can be improved by using a case of lower shock impedance, such as polymethyl methacrylate. High-impedance cases, including Al alloys but with denser materials improving the launching efficiency, can be used if designed according to the physics of oblique shock reflection, which indicates an appropriate case taper for any combination of explosive and case material. The tensile stress induced in the projectile depends on the relative thickness of the explosive, expansion gap, and projectile. The thinner the projectile with respect to the explosive, the smaller the tensile stress. Thus if the explosive is initiated with a plane wave lens, the tensile stress is lower than that for initiation with multiple detonators over a plane. The previous plane wave lens designs did, however, induce a tensile stress close to the spall strength of the projectile. The tensile stress can be reduced by changes in the component thicknesses. Experiments verifying the operation of explosively launched projectiles should attempt to measure porosity induced in the projectile: arrival time measurements are likely to be insensitive to porous regions caused by damaged or recollected material.     

冲击波信号后期处理方法研究

冲击波超压测试是武器系统毁伤效能评估的主要方法之一,信号采集后处理方法是否合适直接影响评估结果的好坏。本文分析了理想冲击波特性,列举了5种典型实测冲击波曲线:分别叠加了振荡信号、弹道波、瞬间抖动信号的冲击信号,反射波和入射波叠加的冲击波信号,非指数衰减的冲击波信号。采用滤波、拟合和小波技术,对5种曲线进行处理,并给出了每种典型曲线合适的处理方法。     

小型跌落冲击台的设计原理

介绍一种长脉冲持续时间的小型跌落冲击台，并对其结构特点，工作原理，冲击试验的波形进行阐述与分析，文中还提及有关改进措施。     

小型跌落冲击台的设计原理

本文介绍了一种长脉冲持续时间的小型跌落冲击台，并对其结构特点，工作原理，冲击试验的波形进行阐述和分析。文中还提及了有关改进措施。     

Note: Autonomous pulsed power generator based on transverse shock wave depolarization of ferroelectric ceramics

Autonomous pulsed generators utilizing transverse shock wave depolarization (shock front propagates across the polarization vector P(0)) of Pb(Zr(0.52)Ti(0.48))O(3) poled piezoelectric ceramics were designed, constructed, and experimentally tested. It was demonstrated that generators having total volume of 50 cm(3) were capable of producing the output voltage pulses with amplitude up to 43 kV with pulse duration 4 μs. A comparison of high-voltage operation of transverse and longitudinal shock wave ferroelectric generators is given.     

Computer modeling of the continuous annealing furnace

A computer program to calculate the strip temperature heated in the continuous annealing furnace was developed, using the zone method for radiative heat transfer analysis with the measured gas temperature in the furnace. Using theF _E Operator, the present study considered the effects of soot and transient species, in addition to the H₂O−CO₂ gas mixture on the gas radiative heat transfer. The predicted strip temperature distribution forF _E=1.05 represented well the measured data. The maximum difference in the heat flux transfered to the strip from the combustion gas forF _E=1.0 (without soot and transient species gas radiation) and 1.05 (with soot and transient species gas radiation) was about 15%. The present study also investigated the effects of line speed and thickness variations on the strip temperature, establishing the bases for the on-line computer model.     

悬浮碳烟微粒对柴油发动机磨损的影响

进入机油的碳烟微粒增多是现代低排放车用柴油发动机突出问题。探讨了碳烟微粒对发动机各摩擦副磨损的影响，分析了碳烟微粒的磨损机制，并指出提高分散剂性能与用量是减少碳烟微粒磨损的重要方法。     

基于应力波分析的状态监控与故障预测研究

随着先进的仪器测量与分析、物联网、云计算、数据挖掘、人工智能等科学技术的发展,设备状态监控和故障预测技术近年来在工业设备健康管理中起到越来越重要的作用。研究了一种基于应力波分析的状态监测与故障预测技术,通过应力波传感器对设备运动部件间的摩擦、机械冲击和动态荷载的电子信号进行检测和处理,采用专为应力波分析而开发的时域和频域特征提取软件和基于神经网络的数据融合技术,对设备状态进行定量分析,对设备故障进行准确预测,并提供设备健康诊断分析报告。运行试验表明,与振动分析等传统的状态监测方法相比,本系统能更好地实时监控设备运行情况,更早地预测故障,保证了生产安全性,降低了设备检维修成本,提高了生产效率。