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降低旋风除尘器阻力的实验研究 总被引:6,自引:0,他引:6
本文通过对装有方形、弧形导向极的旋风除尘器进行实验研究及分析,结果表明:安装方形、弧形导向板都可以降低旋风除尘器的阻力损失,而除尘效率在入口速度较大的情况下还有所提高。弧形导向极效果更好。 相似文献
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静电旋风除尘器的实验研究 总被引:3,自引:0,他引:3
吕良才 《金属材料与冶金工程》1996,(5):20-23
用特殊旋风子制成制电旋风除尘器,试验了它在不同的入口风速及不同的电场电压下的除尘效果与阻力,并对之进行了分析,得出该样机在实验条件下最佳运行工况条件。 相似文献
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本文借助于Leith和Licht的边界层分离理论,对轴向出风的立式旋风水膜除尘器的除尘性能进行了分析,并得出了除尘效率的理论公式的一些有意义的结果。 相似文献
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作为工业生产应用中一种重要气固两相分离装置,旋风除尘器的应用广泛分布于船舶制造、石油化工、煤炭发电、资源开发等产业领域。基于经典Leith-Licht理论所提出的旋风除尘器半经验设计方法,依据紊流混掺层流分离理论,结合实际含尘空气及其中颗粒物理参数,以旋风除尘器的结构尺寸为变量,建立相应捕集效率数学模型。根据数学模型选择优化目标函数,以自编代码为工具,利用优化设计的思想,采用非线性规划模型对旋风除尘器尺寸进行设计。最后结合计算流体力学(CFD)方法对优化后的尺寸模型进行除尘效率验证。仿真结果表明,改进后的数学模型理论计算与建立的仿真模型计算结果相吻合,误差仅为1.41%。该方法克服了传统设计方法实验验证周期长、经济性差等缺点,对旋风除尘器的优化设计具有重要的工程应用价值。 相似文献
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张俊峰 《有色金属(冶炼部分)》2021,(2)
含砷金铜精矿火法熔炼电尘灰是铜冶炼熔炼车间产出的中间产物,成分复杂,较难处理,属于典型危废。以山东某冶炼公司含砷金铜矿熔炼产出的中间产物电尘灰为原料,采用双氧水为氧化剂进行酸性氧化浸出,最佳浸出工艺条件为:双氧水用量120kg/t、酸性氧化浸出时间2h、浸出温度80℃、酸度60g/L,铜和砷的浸出率分别达到92.30%、87.50%以上。为铜冶炼企业湿法处理电尘灰提供了一条新途径。 相似文献
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张俊峰 《有色金属(冶炼部分)》2021,(2):35-39
含砷金铜精矿火法熔炼电尘灰是铜冶炼熔炼车间产出的中间产物,成分复杂,较难处理,属于典型危废。以山东某冶炼公司含砷金铜矿熔炼产出的中间产物电尘灰为原料,采用双氧水为氧化剂进行酸性氧化浸出,最佳浸出工艺条件为:双氧水用量120 kg/t、酸性氧化浸出时间2 h、浸出温度80 ℃、酸度60 g/L,铜和砷的浸出率分别达到92.30%、87.50%以上。为铜冶炼企业湿法处理电尘灰提供了一条新途径。 相似文献
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采用自主研发的顶吹炉处理含Cu 6.54%、Au 3.2g/t、Ag 32.7g/t的废旧印刷电路板,探索了渣型、温度、风量和燃料量对产品粗铜含铜量和铜回收率的影响。结果表明,控制渣中SiO_2/FeO≈1.35、SiO_2/CaO≈2、炉温1 250℃、每100kg电路板喷枪工艺风量450m~3(标态)和柴油100L的工艺条件下,产品粗铜含Cu 90.25%、Au 45.5g/t、Ag 445.6g/t,废旧印刷电路板中Cu、Au、Ag总回收率均大于95%,烟气达标排放。通过顶吹炉处理废旧印刷电路板,有价金属回收率高,工艺可行,具有产业化前景。 相似文献
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Effect of Autogenous Arc Welding Processes on Tensile and Impact Properties of Ferritic Stainless Steel Joints 总被引:2,自引:0,他引:2
The effect of autogeneous arc welding processes on tensile and impact properties of ferritic stainless steel conformed to AISI 409M grade is studied. Rolled plates of 4 mm thickness have been used as the base material for preparing single pass butt welded joints. Tensile and impact properties, microhardness, microstructure, and fracture surface morphology of continuous current gas tungsten arc welding (CCGTAW), pulsed current gas tungsten arc welding (PCGTAW), and plasma arc welding (PAW) joints are evaluated and the results are compared. It is found that the PAW joints of ferritic stainless steel show superior tensile and impact properties when compared with CCGTAW and PCGTAW joints, and this is mainly due to lower heat input, finer fusion zone grain diameter, and higher fusion zone hardness. 相似文献
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Effect of Heat Input on Fume Generation and Joint Properties of Gas Metal Arc Welded Austenitic Stainless Steel 总被引:1,自引:0,他引:1
The effect of heat input on fume and their compositions during gas metal arc welding (GMAW) of AISI 316 stainless steel plates are investigated. Fume generation rate (FGR) and fume percentage were determined by ANSI/AWS F12 methods. Particle characterization was performed with SEM-XEDS and XRF analysis to reveal the particle morphology and chemical composition of the fume particles. The SEM analysis reveals the morphology of particles having three distinct shapes namely spherical, irregular, and agglomerated. Spherical particles were the most abundant type of individual particle. All the fume particle size falls in the range of less than 100 nm. Mechanical properties (strength, hardness and toughness) and microstructural analysis of the weld deposits were evaluated. It is found that heat input of 115 kJ/mm is beneficial to weld stainless steel by GMAW process due to lower level of welding fume emissions and superior mechanical properties of the joints. 相似文献
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The paper presents a feasibility study on application of the gas tungsten arc welding (GTAW) process to obtain metal composite functional coating for advanced tribological application. Silicon carbide (SiC) particles in the form of powder was added to a weld pool in autogenous mode as well as with an additional filler wire. Powder feeding was carried out at different angles and with varying separation distance from the welding torch. The metallurgical characterization of the cladded structure was carried out using optical as well as scanning electron microscopy (SEM). Energy dispersive X‐ray spectroscopy (EDS) was performed to analyze the composition of the deposited weld metal. It has been observed that due to low SiC density it was difficult for particles to penetrate the weld pool. Also the added SiC was found to be dissociated into Si and carbon (C) and the large amount of dissolved C in the weld pool resulted in formation of graphite phases. 相似文献
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本文设计了一种超音速气雾化喷嘴, 采用水代替金属熔体进行雾化模拟实验, 使用高速摄影机拍摄所获得
的雾化流场并进行分析。 结果表明, 水的雾化破碎过程遵循二次破碎理论, 水流先产生扰动, 发展为波状并破碎
成条带, 最后发生二次破碎形成细小的液滴。 在流场的形状、 结构上, 水的雾化与使用 Fluent 软件模拟的结果一
致, 不同参数下的实验结果也与计算机模拟的结果相似, 验证了计算机模拟结果的可靠性, 计算机模拟的结果在
一定程度上可以作为工业设计的参考。 相似文献