共查询到20条相似文献,搜索用时 390 毫秒
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系统地分析了离心式煤气鼓风机转子、轴承、叶轮、主轴、非转动部件等各种常见故障。对存在的问题提出了改进措施,使风机的寿命大幅度地提高,故障率明显下降。 相似文献
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针对宣钢公司4#高炉煤气洗涤循环水系统水泵工频运行,日常洗涤水量由阀门开度调节控制、供水量较大、供水电耗高、造成大量电能浪费的问题,在低压水泵处增加1套目标电耗节能控制系统及变频控制柜,对高压水泵的叶轮进行切削处理,改造后该系统每年的节电效益为36.3万元,为4#高炉提供了合格的煤气洗涤水,系统运行稳定可靠,取得了较好效果。 相似文献
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某公司动力厂的煤气站加压机是该厂的关键性设备之一。其作用是将煤气发生炉所产煤气加压,经管道输送至各用户使用,其状态直接影响煤气站的安全运行和用户生产。现投入运行的3台煤气加压机为2008/435型离心风机。转速为2980r/min,叶轮直径870mm,轴承座内有左右两个轴承盒,每个轴承盒内装有两套面对面安装的角接触球轴承,型号为7022ACM,轴承的润滑方式为油浴润滑。 相似文献
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柏红梅 《冶金设备管理与维修》2014,(3):8-10
根据气体在风机叶轮内流动的流场,分析了粉尘在叶轮内的流动规律,分析了粉尘在叶轮叶片上的沉降机理。找出了造成叶片积灰的主要影响因素,提出了破坏或减轻灰尘颗粒在风机叶轮叶片上聚积作用的具体办法。 相似文献
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莱钢50t电炉采用屋顶大烟罩与电炉第四孔相结合的正压大寺器进行除尘,烟尘排放达到GB1629-1996标准要求,除尘风机采用防磨技术后,叶轮使用寿命达到2年以上。 相似文献
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Abstract: The impeller blade structure for gas injection refining under mechanical stirring has been explored by water model experiments. A sloped swept-back blade impeller is'proposed for the purpose. The central part of the impeller is disk- or plate-shaped, and the blades are fitted to the side of the disk or plate. In addition, a disk is put on the top side of the impeller blades. The impeller can strengthen the radial and downward flow between the blades and weaken the swirl flow in the zone above the impeller. These effects on flow phenomena are favorable for disintegration and wide dispersion of bubbles which are injected from a nozzle attached to the center of the underside of the impeller. In addition, the sloped swept-back impeller requires less power consumption. The impeller shaft should be placed away from the vessel center so as to disperse the injected bubbles widely in the bath under mechanical stirring even with unidi- rectional impeller rotation and without installing baffles. The number of gas holes in the nozzle and the direction of gas injection have a little effect on the bubble disintegration and dispersion in the bath. Highly efficient gas injection refining can be established under the conditions of proper impeller size, larger nozzle immersion depth, larger eccen- tricity and rotation speed of the impeller. The sloped swept back blade impeller can decrease the power consumption and vet improve the bubble disintegration and wide dist~ersion in the bath. 相似文献
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《钢铁研究学报(英文版)》2014,(2)
The impeller blade structure for gas injection refining under mechanical stirring has been explored by water model experiments.A sloped swept-back blade impeller is proposed for the purpose.The central part of the impeller is disk-or plate-shaped,and the blades are fitted to the side of the disk or plate.In addition,a disk is put on the top side of the impeller blades.The impeller can strengthen the radial and downward flow between the blades and weaken the swirl flow in the zone above the impeller.These effects on flow phenomena are favorable for disintegration and wide dispersion of bubbles which are injected from a nozzle attached to the center of the underside of the impeller.In addition,the sloped swept-back impeller requires less power consumption.The impeller shaft should be placed away from the vessel center so as to disperse the injected bubbles widely in the bath under mechanical stirring even with unidirectional impeller rotation and without installing baffles.The number of gas holes in the nozzle and the direction of gas injection have a little effect on the bubble disintegration and dispersion in the bath.Highly efficient gas injection refining can be established under the conditions of proper impeller size,larger nozzle immersion depth,larger eccentricity and rotation speed of the impeller.The sloped swept-back blade impeller can decrease the power consumption and yet improve the bubble disintegration and wide dispersion in the bath. 相似文献
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通过CFD软件对以SO2气体为还原剂的锰矿浸出过程进行数值模拟,对比刚性单桨、刚性双桨及刚柔组合桨对于气-固-液三相混合强化作用。通过对固相及气相浓度云图分析,比较三种不同结构配置的搅拌反应器对固体颗粒悬浮和气体分散的作用大小,并对搅拌反应器内宏观、介观及其微观混合性能通过轴向和纵向的速度、湍动能及湍动能耗散率进行对比分析。结果表明:刚柔组合桨流场内并未出现颗粒团聚、气体分散不均等现象,并在流场上部对于颗粒悬浮及气体分散作用明显要强于单轴单桨及单轴双桨;刚柔组合桨的宏观、介观及其微观混合性能的表现均优于单轴单桨及单轴双桨。 相似文献
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针对烧结生产工艺采用多管除尘方式除尘效率低、故障率高的问题,根据生产实际情况,采用重力降尘室,达到除尘效果,有效地减少了粉尘对风机叶轮的磨损。 相似文献
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因与 3 6m2 烧结机配套的机头除尘器易堵塞、难拆装维护、除尘效果差 ,改造采用ST -XF型高效多管除尘器取代原老式 2 88管除尘器 ,实现了二级除尘。应用表明 ,排放烟气中的含尘量由 187mg/m3降为 94mg/m3,风机叶轮平均寿命由 180天延长至 60 0天 ,年效益可达 180万元。 相似文献
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文章对造成除尘风机异常振动的有关因素进行了分析。通过利用声振测试技术及分析技术、测温技术诊断除尘风机的异常振动。采取提高风机叶轮动平衡水平、风机联轴器较直水平消除异常振动。保证了除尘风机的稳定运行。 相似文献
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详细地研究了吸尘器叶轮上片用5052合金板材的冷加工工艺。结果表明,通过采取对铸锭进行均匀化处婵和合理控制最终冷轧变形量以及适当提高回火温度的方法,可以使材料力学性能与深冲性能获得良好的匹配,表面质量稳定,完全满足用户的使用要求。 相似文献