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针对目前炼化行业中传统采样器存在的故障率高、污染大及采样准确率低等问题,结合人机工程学相关知识研制了一款新型密闭环保采样器。 相似文献
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某年产100万吨乙烯装置KBR工艺包质谱采样点位设计在急冷器前面,针对投用过程中部分PY-Gas采样器温度降不到设定值;样品冷却后产生的凝液来不及下沉回流,随气体样品一起流出采样器,未达到平衡;不同时间段、不同安装位置的PY-Gas控温差异大的问题,提出优化改进措施。改进投用后,PY-Gas采样器出口温度基本都达到了技术要求,采样出口样气也达到了无油、无水,温度保持在3~10℃的要求。 相似文献
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从密闭采样器的功能设计、结构性能、分类选型及技术应用等方面介绍了SM系列密闭采样器在甲醇生产装置的各个采样点全面安装应用情况,该技术满足了大型现代化工装置在线密闭采样要求,可实现安全环保零排放分析采样。 相似文献
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随着液氨制冷设备的广泛普及,相关设备的液氨泄漏事故时有发生。通过2起液氨泄漏事故,简要分析了目前液氨制冷设备在压力管道方面存在的一些主要问题,并针对性地提出了一些建议。对于全面地规范相关设备的安装质量与运行安全、减少事故的发生提供了一些有益的参考。 相似文献
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目前浮法玻璃行业氨分解制氢装置中所采用的液氨卸车系统存在浪费大,污染严重等问题。本文介绍了一种新型、高效、安全、环保的液氨卸车系统。文中还对新、老系统的两种卸车方法进行分析比较,认为新的液氨卸车系统投资小、收效快,可以全面推广使用。 相似文献
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工业黄磷采样器已加工生产由化工部天津化工研究院和南化公司磷肥厂共同起草的工业黄磷国家标准GB7816—87已执行多年,标准中规定采用黄磷采样器进行采样。黄磷采样器由化工部天津化工研究院独家生产加工制造。几年来经各单位使用,效果良好,解决了黄磷采样的难... 相似文献
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针对间歇过程固有的多阶段特性,也为了克服传统阶段划分方法严格按照物理时刻顺序将采样点硬性分割而不能使其寻找数据特征最为相近的聚类中心的严重缺陷,提出基于仿射传播聚类(AP)的子集多向主元分析(subset-MPCA)监测新方法:采用全新的乱序聚类思想,将时间片矩阵打乱用AP进行无约束乱序聚类,使样本突破时间顺序的约束自由找寻与其特征最为相近的聚类中心,获得聚类子集,建立精确的子集MPCA监控模型。在线监控时,引入信息度传递实现实时采样点的阶段归属判断,解决阶段不等长批次的最佳模型选择问题。对青霉素仿真数据的实验表明,该方法较传统方法可有效降低故障的漏报和误报,有着更加可靠的监控性能。 相似文献
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Chirdpong Preechakul Soorathep Kheawhom 《Journal of Industrial and Engineering Chemistry》2009,15(1):110-118
In this work, we develop a new efficient technique to enhance the optimization ability, and to improve the convergence speed of genetic optimization algorithm. We investigate and introduce a number of sampling techniques to generate a good set of initial population that encourages the exploration through out the search space and hence achieves better discovery of possible global optimum in the solution space. The introduced sampling techniques include Latin hypercube sampling (LHS), Faure sequence sampling (FSS), and Hammersley sequence sampling (HSS). The performances of the proposed algorithms and a conventional genetic algorithm using uniformly random population are compared, both in terms of solution quality and speed of convergence. A number of test problems and a case study, optimization of multi-effect distillation, demonstrate the feasibility and effectiveness of the proposed techniques. With the same parameters, our technique provides a better solution and converge to the global optimum faster than the traditional genetic algorithm. 相似文献
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论述了XHSS自动采制样系统的工作原理、在田庄选煤厂使用过程中的时间设定及应用效果,指出了系统本身在使用过程中存在的问题和相应的改进对策;该采样系统的应用,提高了入厂原煤采制样自动化水平,增强了化验数据的客观公正性,遏制了原煤掺杂使假现象的发生,具有显著的经济效益。 相似文献
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《应用陶瓷进展》2013,112(3):109-113
AbstractThe prospective use of incinerated sewage sludge ash (ISSA) as a partial replacement for traditional brick-making materials has been previously reported. However, variability in the consistency of the raw materials used in commercial brick manufacture can cause serious production problems. Consequently, to gain market confidence for ISSA in this role, it is essential to establish that its quality is not detrimentally affected either by the nature of the sewage sludge being burned, or as a result of the performance of the incineration process itself. Ash sampling was conducted at a large modern commercial sewage sludge incinerator over a six week period, followed by property characterisation and ceramic evaluation. The results confirm that this source of ISSA is satisfactorily consistent in quality over time, thus verifying its potential for use in brick manufacture on a commercial basis. Recommendations for additional research to help ensure widespread acceptance are also discussed. 相似文献
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Zhimian Hao Chonghuan Zhang Alexei A. Lapkin 《American Institute of Chemical Engineers》2022,68(6):e17616
We propose a sequential sampling approach to training statistical digital twins. This approach is relevant for real-world engineering problems with expensive data generation. Prerequisite for building surrogates is sufficient data; however, oversampling does not improve regression accuracy. The time for data generation may be reduced by: (a) applying a classifier to improve data quality and avoid evaluation of infeasible inputs, and (b) employing dynamic sampling linked to regression quality. In dynamic sampling, the initial sampling rate is large to generate enough data for surrogate regression in a few iterations; the sampling rate gradually slows down with the improvement of the iteratively refined surrogate. A dynamic process and a steady-state process from the field of carbon capture and utilization are used as case studies: pressure swing adsorption (PSA) and gas-to-liquids (GTL). The computational costs for surrogates generation are reduced by 86% for PSA and 51% for GTL, compared with employing a static sampling rate. 相似文献
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介绍了纺织品中的重金属铅、镉元素的来源及毒性;综述了纺织品中铅和镉的含量测定方法研究进展;纺织品中铅和镉含量的传统测定方法有原子吸收光谱法、电感耦合等离子体原子发射光谱法、电感耦合等离子体质谱法、高效液相色谱法、电化学分析方法、X射线荧光光谱法、基于显色剂的分光光度法,快速检测方法有固体直接进样技术、基于金纳米颗粒目视比色法、胶体金层析试纸条、生物条形码检测技术;对传统检测方法存在的问题及快速检测技术的发展瓶颈进行了阐述;指出研制试样用量少、耗时短、成本低、简单便捷可靠、便于实现现场快速、准确检测纺织品试样的前处理方法是纺织品重金属铅镉元素安全快检技术的关键点;建议将高效便携仪器及车载仪器,溶剂提取、微波技术等试样快速前处理技术与纺织品快速检测技术联用,以便实现现场快速便捷、灵敏、准确地检测纺织品中重金属铅、镉含量。 相似文献
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采用S7-300系列的可编程逻辑控制器(PLC)[1]高性能控制系统和上位监控软件WINCC,对传统锅炉补给水处理的自动控制进行优化,使系统配置组态、实时采样及控制点组态、控制过程组态、流程显示及操作画面组态、生产记录及统计报表组态等软件的设计均模块化. 相似文献