共查询到19条相似文献,搜索用时 468 毫秒
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根据空冷器使用特点及空冷器布置规范,首先对其业内布置基本要求进行介绍.考虑空冷器的换热效率,空冷器顶部放空口须高于空冷器至少0.5 m,另外空冷器应避开操作温度≥250℃的设备,且空冷器年最小风频上风侧20~25 m范围内应避免设有高于空冷器的装置.根据空冷器的布置特点,空冷器附属管道管径一般为40 mm或者50 mm,且应对称安装.将管口设计为DN150,按照集合管横截面积和与分支管横截面积总和比值为1.5,进出口集合管的管径为DN450,二级集合管的管径至少为DN750.采用Pipeline模拟可得进口各管道物料流量均匀,最大的正负偏流体积量为1.21%和-1.62%,偏流在允许范围内,设置符合实际运行工作要求.本研究成果可为空冷器及其管道的安全高效运行提供保障. 相似文献
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依据湿式空冷器测试标准建立了性能测试试验台,试验研究了干球温度和湿球温度对湿式空冷器冷却能力的影响。结果表明,当湿球温度一定时,干球温度对湿式空冷器的影响较大;因此,设计湿式空冷器时不能只考虑湿球温度,不考虑干球温度。同时分析了湿球温度与湿空冷管程进水温度的温差对湿式空冷器冷却能力的影响。 相似文献
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空冷器管嘴的受力和力矩要符合API-661相关规定。利用CAESARⅡ对常顶油气空冷器进口管线进行应力,可得出结论:适当增加管线柔性,可减小管道系统位移对空冷器管嘴受力的影响,从而设计出合理的空冷器管道布置方案。 相似文献
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介绍了表面蒸发式空冷器的工作原理、结构特点及其在气体分离装置的应用效果 ,并将表面蒸发式空冷器的性能与湿空冷器进行了对比。 相似文献
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李荣平 《中国石油和化工标准与质量》2019,(18):109-110
文章对常减压装置在扩能技改中使用板式湿空冷器解决了改造中的难题,并通过对改造前后工况和能耗进行对比,说明了板式湿空冷器的在装置改造中的作用,并通过实践总结出板式湿空冷器安装要求、运行的注意事项,使板式湿空冷器能长周期运行。 相似文献
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Typical methods of dehumidification of air circulating in the dehumidifying driers (indirect and direct cooler and partial exchange of the air) were analysed. Energy aspect of cooler operation was evaluated. The method for minimization of unit thermal energy consumption in a dehumidifying drier by the optimal selection of the cooler point was also given. Methods of the heat recovery of heat conveyed in a cooler lending to save energy (heat regeneration. expansion and compression of the air, a dehumidifier) were analysed. It was indicated that introduction of dehumidifiers into contemporary wood driers caused significant improvement of energy aspects of their operation 相似文献
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某炼油厂三台急冷水空冷器运行十个月后出现泄漏,通过对这三台急冷水空冷器腐蚀部位的外观、急冷水的组成的分析,阐明了介质中硫含量高是造成空冷器泄漏的主要原因,并提出了相应的预防措施,该类设备的安全稳定的运行得到了保证。 相似文献
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介绍空冷器在化纤聚酯项目中的一项应用成果。原聚酯生产工艺流程通过冷却水列管式换热器将100.5℃的酯化蒸汽降至55℃,现改为用空冷器和板式换热器进行冷凝冷却。改造后大大降低了运行成本,原水泵运行功率为420kW,改造后空冷器和板式换热器运行功率为88kW,节约电力332kW,并且基本不再需要冷却水,节能节水效果明显。论述了冷却方案的选择和空冷器的设计、空冷器的特点、运行结果和经济效益以及投资回收周期。 相似文献
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S. M. Gubanov A. Yu. Krainov R. L. Mazur 《Theoretical Foundations of Chemical Engineering》2016,50(5):766-775
A physical and mathematical model has been developed for the cooling of a block of receiver tanks for uranium hexafluoride desublimation with cold air supplied to heat exchangers by a VKhM-0.54/0.6 air cooler. Calculations have been carried out for the most heat-intensive operating regime of the receiver tank block, in which four tanks are cold and operate in the product desublimation mode, two tanks are being cooled after the evaporation of the product, and six tanks are reserved, being maintained in the cooled state. Experimental data are presented for the cooling of the vapor desublimation tank section using the VKhM- 0.54/0.6 air cooler. The mathematical model of the gas dynamic processes of cold air flow in the pipeline and tank walls–air heat transfer is used to calculate the cooling of the six tanks with a cold air stream from the VKhM-0.54/0.6 cooler. A good quantitative fit between the calculated data and experimental measurements has been attained. The performance parameters of the VKhM-0.54/0.6 air cooler can ensure uranium hexafluoride recovery from the gas mixtures arriving from the collector of the condensation–evaporation apparatus and purification of the product. 相似文献
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对催化分馏塔顶冷凝系统存在的问题进行了分析,提出优化流程,应用表面蒸发式空冷器替代干湿联合式空冷器的改造方案,并设计实施,取得满意效果。 相似文献