共查询到19条相似文献,搜索用时 78 毫秒
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根据离线镀膜生产线生产特点,介绍与之相适应的冷冻冷却水系统的设计和选型,及安装过程中的注意事项. 相似文献
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2008~2010年,金隅北京昌平、华润广州越堡和安徽海螺铜陵等三家水泥厂相继正式投产了离线式水泥窑协同消纳市政污泥或垃圾的利废烧废系统,见表1所列。这三家水泥窑烧废系统的建成投产是我国水泥工业烧废工程的重大突破,是中国水泥协会、大型水泥企业集团、科研设计院所和高校、装备制造厂等坚持水泥工业利废和采用替代燃料的技术发展方向的结果, 相似文献
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《中国石油和化工标准与质量》2017,(22):38-40
传统的油色谱离线检测系统在测定变压器绝缘油中溶解气体组分浓度方面,有精确度高,可靠性强等优点,但要求变压器停运以便取油分析。然而根据电网实际运行情况,关键位置的变压器不可停运。油色谱在线监测系统能够在变压器运行状态下实时监测油中溶解气体状态并及时发现如绝缘劣化等不利于电网安全的因素,但其数据的准确度与可靠性,还需与离线测量数据做比对验证。该文基于实验室的气相色谱离线检测系统和某厂家油色谱在线监测系统,阐述了气相色谱法原理,并着重进行了两个系统对三种组分浓度标准油样的比对试验,研究其试验数据和色谱图,根据标准对在线监测系统作出误差评级,分析其性能、优势和局限性,提出改进建议,同时分析了离线检测系统各组分测量的不确定度,确保比对试验及研究的有效性。 相似文献
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刘春风 《中国石油和化工标准与质量》2022,(4):142-144
高完整性压力保护系统是一种高可靠性管线压力保护系统,符合IEC61508/IEC61511中“功能安全”的设计理念。本文主要介绍了HIPPS系统的设计、主要功能以及在南海某天然气开发项目中的典型应用。 相似文献
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绝缘子在线监测需要采集的数据有泄漏电流和空气湿度等,对采集到的数据进行VC的串口通讯,然后与ODBC数据库编程技术相结合,将串口数据实时保存在数据源文件中,实现数据实时采集和随时回放的功能。 相似文献
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为了加强聚氨酯(PU)产品生产工艺监控程序,进一步提高产品质量,从工艺参数记录、环节故障报警提示等角度出发,提出聚氨酯胶生产数据集中监控的思路,并设计DCS监控系统的改造方案,最终实现了聚氨酯生产流程监控系统的安装与使用。表明DCS监控系统是加强聚氨酯工艺控制的较好方法,也是胶粘剂产品控制系统发展的必然趋势。 相似文献
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王晓蕾 《化学工业与工程技术》2013,34(1):40-43
从安全生产角度出发,提出在苯胺装置设置独立的紧急停车系统(ESD)。作为安全保护系统,其权限优先于生产过程控制,实时在线监测装置的安全性。首先阐述了采用ESD的背景,然后对现有苯胺装置的生产状况和自控水平进行了介绍,提出采用ESD的必要性,最后从ESD系统设计选型、ESD功能及特点、切断阀的选用以及ESD联锁设计中需要注意的几方面详细介绍了苯胺装置紧急停车系统的设计选型与应用。 相似文献
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S. Yang 《Powder Technology》2007,178(1):56-72
The need to meter and dispense dry powders or mixtures of powders occurs in a wide range of processes and industries. These include the preparation of pharmaceutical products, the mixing of pigments for paints, inks and glazes, the incorporation of processing additives and pigments into polymer processing lines such as extrusion and in solid freeforming processes. This short review identifies the common features of powder handling in these widely different areas and seeks to distinguish and classify the various principles. Examples are given of designs that span a range of industries. This review is stimulated by current developments in the selective laser sintering of powder assemblies; a solid freeforming pathway for polymer, ceramic and metal prototyping and manufacturing. The goal is to find metering and dispensing systems that are effective in providing the spatial arrangement of composition. Dispensing methods that can produce patterns of different powders are sought. Selective laser sintering of powder assemblies can then be extended from a method of rendering shape to one in which both shape and composition are delivered directly into the external world from a computer file. 相似文献
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Stochastic programming models for optimal shale well development and refracturing planning under uncertainty 下载免费PDF全文
Markus G. Drouven Ignacio E. Grossmann Diego C. Cafaro 《American Institute of Chemical Engineers》2017,63(11):4799-4813
In this work we present an optimization framework for shale gas well development and refracturing planning. This problem is concerned with if and when a new shale gas well should be drilled at a prospective location, and whether or not it should be refractured over its lifespan. We account for exogenous gas price uncertainty and endogenous well performance uncertainty. We propose a mixed‐integer linear, two‐stage stochastic programming model embedded in a moving horizon strategy to dynamically solve the planning problem. A generalized production estimate function is described that predicts the gas production over time depending on how often a well has been refractured, and when exactly it was restimulated last. From a detailed case study, we conclude that early in the life of an active shale well, refracturing makes economic sense even in low‐price environments, whereas additional restimulations only appear to be justified if prices are high. © 2017 American Institute of Chemical Engineers AIChE J, 2017 相似文献