共查询到20条相似文献,搜索用时 140 毫秒
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本钢板材发电厂33号机采用低真空供暖,供暖形式为循环水通过4台板式换热器对热网回水进行加热。为了满足供暖需求,真空在-70 kPa左右、排汽温度在70℃左右,该工况若长时间运行,则会造成凝汽器铜管与管板之间胀口松脱,影响机组安全稳定运行。为此将凝汽器改造为热网凝汽器,即非采暖期凝汽器将汽轮机乏汽冷凝,回收凝结水;采暖期凝汽器直接作为热网换热器,为热用户提供余热水。 相似文献
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莱芜钢铁集团有限公司(简称莱钢)城建房产部供热车间除了负责79万m^2的蒸汽集中供暖外,还担负着29万m^2的锅炉供暖任务,设有8个锅炉房,14台锅炉。在2002~2003年采暖期,共耗煤13000t,耗煤量为44.8kg/m^2。为了减少煤消耗,降低能源费用,在2003年停暖期间,供热车间对两台锅炉的膛内壁和水冷壁喷涂高温远红外节能涂料,涂刷面积116.3m^2,取得了一定的节能效果。 相似文献
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医疗废物高温蒸汽处理技术作为非焚烧技术中的最常用的一种,已开始在国内逐步应用。而针对高温蒸汽处理技术,本文首先对医疗废物高温蒸汽处理技术原理、优缺点等内容进行了阐述,并按工艺特点将常见工艺流程分为三类,对医疗废物高温蒸汽处理工艺的适用性、分类和包装要求、处理工艺参数的确定和合理性以及废液、废气和废渣的排放等问题进行探讨,提出了高温蒸汽处理技术在国内应用存在的问题及建议。 相似文献
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本在对经软水改造工程后的1997-1998年采暖期尖峰加热器结垢原因进行认真分析的基础上,提出相应的解决办法。 相似文献
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SP—700钛合金的开发和应用 总被引:3,自引:0,他引:3
黄金昌 《稀有金属与硬质合金》1998,(3):58-62
SP-700具有比传统钛合金更为优异的性能,可锻性好,使用寿命长且成本较低,在运动器械,手工工具和手表制造等非航空领域具有一定的应用价值,预计还将用于蒸汽透平叶片的生产。 相似文献
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简要分析了酒钢炼轧厂转炉扩容后,汽化冷却系统运行中出现的问题,对汽化系统自动放散功能进行恢复改进以及对汽化系统运行参数进行优化,目的在于减小汽包水位波动、降低汽化系统压力,延长烟道的使用寿命,为转炉高效安全生产创造条件,提高转炉蒸汽回收,降低转炉工序能耗。 相似文献
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At large steelworks, compressed air is produced by cogeneration systems, which generate electrical power, heat, and compressed air. The power and heat are produced in steam turbines. One- or two-stage compressors driven by steam turbines are generally used to compress the air. In the case of two-stage compressors, air cooling is only used ahead of the second stage, for the sake of energy efficiency. Heat exchangers and cooling units based on water are used for this purpose. The water temperature is reduced beyond the heat exchangers in ordinary cooling towers. Air at the ambient temperature is sent to the first stage of the compressor. When using this system, the temperature of the cooled air depends primarily on the ambient temperature. In many cases, that prevents cooling of the air to the required temperatures ahead of the compressor stages, especially in summer. In the present work, a new configuration is proposed for the cogeneration system at a metallurgical enterprise. Specifically, this involves the introduction of a sorptional thermal transformer operating as a refrigerator. The steam from the power turbine drives the sorptional thermal transformer, which lowers the air temperature at the input to the first and second stages of the compressor. The thermodynamic efficiency of the new system is assessed on the basis of its total fuel consumption, other conditions being equal. Formulas are proposed for the change in total fuel consumption in the generation of power, heat, and compressed air when using the sorptional thermal transformer. Estimates show that the sorptional thermal transformer reduces the total fuel consumption per hour by 0.15 t of conventional fuel when the air temperature at the input to the first and second stages of the compressor is reduced by 10°C. 相似文献
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阐述了利用转炉汽化冷却蒸汽取代快装燃气锅炉用于真空精炼炉的意义、采取的措施、技术特点及推广前景。 相似文献
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The high amount of latent and sensible enthalpy discharged from the melting process in an electric arc furnace (EAF) through the off-gas offers high potential for waste heat recovery. Evaporative cooling systems (ECSs) installed at dedusting systems of some EAFs are utilising this waste heat for steam generation and subsequent usage of steam for further applications. Within the following paper, further optimisation approaches of this waste heat recovery are examined comparatively by means of exergetic analysis. Thereby, the focus is on the excessive intake of false air into the dedusting system to ensure a complete CO post-combustion. While a sheer energetic examination of the enthalpy hardly shows any differences, the exergetic calculation confirms the significantly higher amount of generated steam with controlled false air ingress. For the calculated optimal reference case with stoichiometric post-combustion, between 50 and 70% more steam could be produced. Even though a stoichiometric post-combustion cannot be realised for safety reasons, the calculation shows the potential of controlled false air intake for CO post-combustion. 相似文献
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结合首钢迁钢公司能源利用实际要求,配套建设了一台150 MW纯燃高炉煤气的燃气蒸汽联合循环发电机组,在利用副产高炉煤气进行联合循环发电的同时,利用余热锅炉次高压一级过热器引出一路次高压蒸汽外供公司管网,余热锅炉产生的次高压、低压蒸汽经过汽轮机做功拖动发电机发电,产生的乏汽经凝汽器换热部分通过分体式水源热泵空调机为控制楼进行制冷(制热),形成了一套冷热电联产的总能系统,在钢铁厂能源综合梯级利用方面进行了新的尝试. 相似文献
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介绍了KDON-20000/40000型制氧机组空气预冷系统低温结晶出现的现象,分析了原因,采用蒸汽加温水洗、药剂清洗及氮气加温水洗的方法清除了结晶物,同时提出水冷塔补充新水改造方案,解决了低温结晶问题。 相似文献