工业在用钛设备清洗技术

介绍了在用钛制工业设备除垢清洗的有关技术问题,特别对钛设备化学清洗中缓蚀剂选用及有关问题作了分析。     

壁面清洗机器人--"蓝色超人"的开发研制

介绍了“蓝色超人”壁面清洗机器人开发研制的意义及重要性,详细论述了壁面清洗机器人的技术特征和实施方案。“蓝色超人”在无线遥控、真空吸附、高效清洗装置,姿态控制等方面取得突破性的进展,为机器人产业化奠定了技术上的保证。     

火电厂的腐蚀与防腐蚀对策

我国的电力生产以火电为主 ,火电厂的事故中锅炉腐蚀占一定份额。通过对火电厂的各类腐蚀的分析 ,指出化学清洗是防止锅炉腐蚀的有效措施     

Environmental assessment of flue gas cleaning processes of municipal solid waste incinerators by means of the life cycle assessment approach

Life cycle assessment (LCA) is an environmental assessment tool generally applied to products but also to processes. Features of the LCA of processes are presented in this paper. This approach was used to compare two flue gas cleaning processes: the typical wet-type process and the new transported droplets column process. The LCA result shows that the global environmental burden is similar between the two processes, which confirms the viability of the transported droplets column. The distribution of the environmental burden, however, is different between the two processes. The weak points of the transported droplets column are the pollution transfer from air to water and a larger volume to stabilize. Its strong point: it is more efficient in capturing dust particles and toxic pollutants. This process could be improved from an environmental standpoint by adding an electrostatic filter upstream of the transported droplets column to capture the particles. The laboratory results of the transported droplets column need, however, to be confirmed at a larger scale.     

Forward-osmosis strategy and chemical cleaning of seawater desalination reverse osmosis membranes

In order to settle the membrane fouling of reverse osmosis membranes in seawater desalination process, this study reported a novel strategy based on forward-osmosis process and discussed the effects of different factors like different cleaning combination among reverse osmosis product, simulated reverse osmosis concentrate and simulated seawater, as well as cleaning time on the membrane permeate flux and salt rejection. For irreversible fouling, the effects of different chemical cleaning agents, immersion time and concentration were also investigated in this study. The results exhibited that the cleaning combination between diluted water and simulated reverse osmosis concentrate possessed the best cleaning performance in the process of forward-osmosis cleaning. Such approach also enhanced normalized flux from 9.48 L/(m²·h·MPa) to 13.6 L/(m²·h·MPa) and enhanced NaCl rejection from 80.59% to 92.80%. Furthermore, the normalized flux was enhanced from 9.48 L/(m²·h·MPa) to 14.3 L/(m²·h·MPa) and NaCl rejection was also enhanced from 80.59% to 96.27% after soaking in 2%(mass) citric acid solution for 2h, soaking with 1%(mass) ethylenediamine tetra-acetic acid tetrasodium salt and 0.3%(mass) sodium tripolyphosphate solution for 1.5 h. According to the result of SEM images and AFM images, the forward-osmosis cleaning strategy could not cause the damage of selective layer of membrane surface and caused the drop of inorganic and organic fouling on the membrane surface. Hence, cleaning fouled RO membranes by such approach could prolong the chemical cleaning cycle and reduce the amount of chemical cleaning agent, which has certain industrial application perspectives.     

浅析中央空调的清洗保养与运行管理

介绍了中央空调水系统存在的主要问题,并分析了水系统存在的腐蚀及垢质对空调系统正常运行的影响,及清洗保养的重要性。     

Liquid Explosive Evaporative Removal of Submicron Particles from Hydrophilic Oxidized Silicon Surfaces

A pulsed CO₂ laser-based system, operating at a wavelength of 10.6 μm, was used as a cleaning tool to remove particles as small as 0.1 μm from hydrophilic, oxidized silicon surfaces. The laser beam served as a fast heating source to induce the explosive evaporation of a water film deposited on the particle-contaminated surface. The resulting explosive forces were high enough to expel particles from the surface efficiently. The contaminant particles used were 0.1 μm alumina, 0.1-0.2 μm silica, and 0.1 μm polystyrene latex.

For each of these, the cleaning efficiency was monitored as a function of the laser fluence, the thickness of the deposited water film and the number of cleaning cycles. Whatever the nature of the particles, the cleaning efficiency was characterized by an upper limit of the energy density, determined to be 1.5 J/cm², at which substrate damage occurred. At all lower laser fluences, the removal efficiency was particle-dependent.

The thickness of the deposited water film was varied by changing the time of exposure of the surface to water vapor, the vapor flow being fixed at 4700 ml/min. An exposure time of 1.5 s was found to be the most effective. Increasing the number of cleaning cycles permitted the evaluation of the effect of the zeta potentials of the particles with respect to that of the surface.     

空压机空冷器清洗除垢及其实际意义

用化学清洗的方法清除空压机空冷器中的积垢，在实践中取得了很好的效果现场工业应用的结果表明，化学清洗具有强化设备管理、节能、安全等优点     

锅炉受热面联络管内壁氧化皮层缺陷分析

针对开封火电厂2×600MW机组扩建工程中锅炉受热面联络管内表面上存在氧化层的问题,分析高温下钢铁表面氧化层组织结构,比较3种铁氧化物的PBR比及膨胀系数,得到氧化层容易剥离的原因;并确认硫酸酸洗法可以有效去除受热面联络管内表面上氧化层．     

认知无线电中基于分派问题模型的优化PAPR算法

基于WOFDM的认知无线电(CR)系统,将分派问题的优化模型应用于抑制峰均功率比(PAPR)的研究。在滤波器组级数固定的条件下,选择最优小波包基调制信号,使系统获得最优峰均功率比。分析及仿真表明,新算法既不损失系统误码率(BER)性能,又能明显地抑制系统PAPR,并且不需要任何边带信息。此外,新算法的设计满足并行计算的限制,可实现基于多核编程的并行计算,从而确保新算法的执行性能。