共查询到20条相似文献,搜索用时 140 毫秒
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安装某电厂锅炉过热器时,采用多联箱组合和加固吊装方法。多联箱过热器组合和吊装时,设计了联置式组合架,对蛇形管排与联箱进行组合;还对二级减温器上、下联箱间进行加固;对高温过热器联箱间水平加固;对高过进、出口集箱间和低温过热器组件联箱间进行加固。在对过热器联箱进行受力分析及强度计算后,采用多联箱联置式组合架,地面组合,整体吊装。实践证明:采用该组合、吊装方法吊装,组件能顺利就位,切实可行。 相似文献
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介绍了上海外高桥电厂二期工程建设900MW塔式锅炉的安装及工艺特点.并以炉膛内部组件吊装、刚性梁整体吊装、尾部烟道吊装为例,阐述了在大型锅炉安装中,应用液压提升装置吊装大型组合件的优越性,从而加快了施工进度,提高了工程质量,减少了高空作业量,为大型锅炉的安装,提供了新的施工理念和安装经验。 相似文献
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本文介绍了河北国华定洲电厂二期工程锅炉受热面集箱在安装前进行金属检验过程中大面积发现集箱三通焊缝、筒体对接焊缝及封头焊缝裂纹的缺陷问题。通过对集箱焊缝裂纹产生的原因进行综合分析并制定相应的解决方法,以期对国内同类型机组的锅炉受热面集箱质量的监督和控制提供借鉴。 相似文献
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对大庆乙烯石化总厂急冷废热锅炉扁集箱堵板焊接时存在的未熔合问题进行了分析,认为扁集箱和堵板之间壁厚差异,以及受到铁水重力影响,是造成靠扁集箱侧单面夹沟的主要原因.经采用扁集箱侧手工堆焊坡口的焊接方法,焊口背面成型良好,扁集箱侧熔合良好,超声波检验合格,保证了焊接质量,满足了安装施工要求. 相似文献
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1前言
在盘南工程锅炉吊装的施工实践中,一批新工艺、新技术在我省、我公司得到首次应用,如汽包倾斜吊装、省煤器出口烟道采用大型加固、竖井受热面采用电动行走葫芦吊装就位、折烟角围墙框架刚性梁大组合、分隔屏过热器的集箱组合吊装等,其中个别工艺属于创新,如受热面高顶板半组合预就位提升穿装; 相似文献
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对于汽轮机本体的安装者来说,如何保证机组最终的效率,是安装1台汽轮机从开始到结束均高度关注的问题。虽然影响汽轮机效率的因素很多,从设计、制造厂的加工水平、施工单位的安装水平到电厂运行水平等,但根据现场安装汽轮机的经验,在汽缸的定位方式、设备及零部件的检查、通流部分间隙的调整、进汽短管处胀圈安装检查、安装与汽缸相连的大口径管道等几方面把好关可以为增加汽轮机的效率做出贡献。 相似文献
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Wahab M.A.A. Hamada M.M. Zeitoun A.G. Ismail G. 《Power Delivery, IEEE Transactions on》2003,18(3):827-834
This paper introduces a newly modified forced oil-cooling system, which comprises a bypass filter (BPF). The BPF has been introduced in such a way that its intake oil is the hot oil from the transformer top and to deliver it at the inlet of the oil-circulating pump. This system has been used for two transformers. Periodical measurements of the physical, chemical, and electrical transformer oil characteristics by standard testing methods before BPF operation, in operation and after stopping its operation in the transformer have been carried out. Before BPF operation, the results revealed that these characteristics are continuously deteriorating with the increase in transformer oil service period. However, when BPF is in operation, this deterioration not only has been reduced but also some of the characteristics have been improved. After the operation of BPF has been stopped, some of the characteristics resumed their deterioration. However, the rates by which these characteristics are deteriorating are noticeably smaller than their initial values. The deteriorated transformer oil characteristics (without installation of BPF) have been predicted by polynomial regression, multiple linear regression, and general linear multiple regression models. The efficiency and feasibility of the new cooling system in preserving in-service transformer oil characteristics have been proved and justified by quantitative evaluation of the measured and theoretically predicted deteriorated (without installation of BPF) characteristics. 相似文献
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脱硫系统不设烟气再热器方案探讨 总被引:3,自引:0,他引:3
脱硫系统较多采用设置烟气再热器(GGH)方案。GGH可以降低吸收塔的入口烟温,提高烟囱出口烟温和烟气抬升高度,但也存在初投资大、运行维护费用高等问题。为此,从技术、经济及环保角度对脱硫系统GGH设置与否进行了比较,探讨了不设GGH方案的可行性,并给出了相关建议。 相似文献