复混肥干燥窑尾气的处理

采用塑料填料塔代替布袋除尘器和钢制喷淋塔,对复混肥干燥尾气进行除尘和脱硫,计算确定喷淋水量、塔径和填料装填量及运行阻力。为减少阻力,适应尾气压力较低的状况,采取将填料串联在尼龙绳上,再悬挂安装在支承条上。技改投入15万元,尾气达标排放(SO2质量浓度36 m g/m3,粉尘质量浓度12 m g/m3)。     

两种典型山地地形的输电塔受力分析

目的 受典型微地形影响,架空输电线路遭受的风速会增大,因此需要研究微地形对输电塔受力的影响。 方法 比较了中国规范、美国规范和澳洲规范的山峰和山坡两种典型山地地形的地形系数,对地形系数进行了参数计算,分析了地形系数的分布规律。计算了不同规范、不同路径方向和不同位置的输电塔塔身主材内力。 结果 结果表明：中美澳规范的地形系数的分布规律基本一致,受坡度、水平距离和竖向高度影响的程度有差异;线路沿山顶走线时,塔身主材受力最大;地形系数比风速增大10%对铁塔受力影响更大。 结论 建议输电线路尽量垂直跨越山顶,两种典型山地地形处的输电塔需考虑地形系数的影响。     

15CrMoR+00Cr17Ni14Mo2/N08825复合板洗涤塔制造工艺择议

以某洗涤塔制造为例,针对技术条件要求爆炸复合的15CrMoR+00Cr17Ni14Mo2不锈钢复合钢板和15CrMoR+ N08825 (0Cr21Ni42Mo3Cu2Ti)镍合金复合钢板冷成形后采取正火加回火工艺只能恢复基材的供货状态,而由此导致在σ相析出温度(600～950℃)和敏化温度(300～840℃)长时间停...     

大型避雷塔整体迁移技术

介绍了高62m大型避雷塔在缺少图纸、工期短的情况下,实施整体迁移的主要施工过程,展现了大型桁架式结构整体迁移成功做法及安全施工的具体措施。     

Energy consumption criteria and labeling program of wet cooling towers in Iran

Increasing concerns about the lack of energy resources, global warming and environmental pollution have pushed the relevant organizations to develop energy saving strategies such as energy labeling programs. In this research, a new energy labeling program is developed and evaluated for the wet cooling towers in Iran. The cooling tower parameters, including its cooling capacity and the fan power consumption, are measured using an experimental setup. The experimental data are standardized to compensate the effect of the ambient wet bulb temperature on the cooling tower performance which cannot be controlled during the experiments. The results show that the cooling tower capacity and the fan power consumption may be correlated properly using a linear function which conducts the authors to present a linear energy index (EI). Based on the statistical analysis of a comprehensive range of products, the energy rating limits are extracted for the main types of cooling towers, including induced draft and forced draft ones. The economical and environmental impression of the program authorization is also discussed in detail. Administration of such program may lead to considerable energy saving in the cooling systems which have major economical and environmental benefits, especially in the large industries.     

A study on an optimal approach temperature control strategy of condensing water temperature for energy saving

An optimal approach temperature (OAT) control strategy is proposed for resetting the condensing water temperature hourly, so to maximize the performance of the combined water chiller and cooling tower system. A system performance factor is introduced for evaluation of the system performance. A regression function is presented for the calculation of an optimal condensing water temperature at each hour of air-conditioning operation. The parameters in the regression function include the ambient wet bulb temperature, the chiller load ratio at the hour, and a dimensionless relative efficiency of chiller and cooling tower. The regression function has an R² close to 1 compared to the computed results. When applied to two cities in Taiwan, the OAT control strategy has a potential to save energy more than 4% on an annual basis. The OAT control strategy is most advantageous when applied to regions with large seasonal variation of wet bulb temperature.     

基于响应面的大型输电塔结构有限元模型动力修正

针对基于灵敏度分析的有限元模型动力修正方法计算效率较低、迭代收敛慢的不足,将响应面法引入500 kV大跨越输电塔基准模型修正.选择塔脚弹性支承刚度为修正参数,依次进行单因素试验、样本值计算、响应面建立与分析、参数优化.修正后,有限元模型非常准确地复现了单塔横、纵两个方向的-阶弯曲动态特性,修正效果与基于灵敏度分析的模型修正方法接近,证明响应面法在有限元模型动力修正领域的应用价值.还探讨了塔架结构修正参数的选取问题,为相关研究提供参考.     

冷却塔布置及热工性能模拟

论述了冷却塔设备布置的原则与基本要求,同时利用软件模拟研究和分析了受限条件下冷却塔的热工表现.     

河南艺术中心标志塔工程施工技术研究与应用

针对河南艺术中心工程标志塔结构特点及施工难点,探讨了标志塔钢结构及玻璃幕墙结构的施工工艺,并充分应用施工图深化优化设计技术、计算机放样下料技术、大型管材相贯线多维数控切割技术、激光(全站仪)测量技术及单机吊装处理技术等,编制科学合理的施工方案,从最优化施工方案本身提高安装精度和加快施工进度。     

从塔基外露反思北方沙漠地区输电线路的勘察设计

本文通过某跨越沙漠区输电线路塔基外露调查,说明北方沙漠地区输电线路勘察设计中应该注意的问题,为以后相应工程积累经验。