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CIMS技术在制水过程中的应用 被引量:1
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作者 张航 罗大庸 《计算机工程与应用》 CSCD 北大核心 2003年第2期26-28,31,共4页
在CIMS工程实施过程中,最重要的是要解决系统的集成和优化。在系统集成方面,不仅要解决由诸多传感器采集到的信息的集成问题,而且要解决具有不同软、硬件结构的异构系统的集成问题。信息集成的目的一方面是为了解决资源共享问题,另一方... 在CIMS工程实施过程中,最重要的是要解决系统的集成和优化。在系统集成方面,不仅要解决由诸多传感器采集到的信息的集成问题,而且要解决具有不同软、硬件结构的异构系统的集成问题。信息集成的目的一方面是为了解决资源共享问题,另一方面,更重要的是希望在集成基础上达到优化的目的,以提高企业的整体效益。文章结合国家863/长沙自来水CIMS应用示范工程课题,运用CIMS的哲理和技术,就制水过程控制在CIMS环境下的有关集成和优化控制问题进行了研究,在集成方面,提出了采用CORBA技术的通用集成结构和实现方式;在优化方面,提出了采用多传感器信息融合技术优化制水过程中的加矾控制的新方法;最后,在制水过程中予以实现。 展开更多
关键词 CIMS 制水过程 应用 净化 集散控系统 计算机集成造系统 信息融合 处理
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制水过程计算机动态画面跟踪系统的研究与应用 被引量:1
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作者 陈岚 李建国 白云松 《工业水处理》 CAS CSCD 2001年第12期44-46,共3页
介绍了在工业微机上采用组态软件 (FIX)对制水过程进行图形式操作、实现动态监控。尤其对组态软件 (FIX)
关键词 计算机 组态软件 制水过程 动态画面 跟踪系统 自来 城镇用
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水厂制水过程MFA自动加药控制 被引量:2
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《净水技术》 CAS 2010年第2期I0001-I0002,共2页
水厂的制水过程中,沉淀池处理作业是最重要的环节之一。沉淀池中的水处理主要有絮凝沉淀和消毒两个环节,主要操作就是向水中投加絮凝剂和消毒剂。合理、准确和稳定的投加是该工艺保证水质的关键,同时也有利于减轻后道工序的处理负担... 水厂的制水过程中,沉淀池处理作业是最重要的环节之一。沉淀池中的水处理主要有絮凝沉淀和消毒两个环节,主要操作就是向水中投加絮凝剂和消毒剂。合理、准确和稳定的投加是该工艺保证水质的关键,同时也有利于减轻后道工序的处理负担和降低制水成本。 展开更多
关键词 制水过程 加药控 MFA 絮凝沉淀 工艺保证 成本 后道工序
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变频技术在化学制水过程中的应用
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作者 姜素君 张兆新 +2 位作者 张彦 赵迎 吴健璞 《天津电力技术》 2004年第2期34-37,共4页
天津军粮城发电厂化学车间原有3台生水泵.过去由于机组补水量大,因此每台生水泵出力均为220m^3/h,每台生水泵配30kW电机一台,各由一个开关柜控制。近几年,经过对设备的不断治理,机组基本上杜绝了跑、冒、滴、漏现象,机组的补充... 天津军粮城发电厂化学车间原有3台生水泵.过去由于机组补水量大,因此每台生水泵出力均为220m^3/h,每台生水泵配30kW电机一台,各由一个开关柜控制。近几年,经过对设备的不断治理,机组基本上杜绝了跑、冒、滴、漏现象,机组的补充水量也大幅度下降。但由于每台泵的出力过大。 展开更多
关键词 天津军粮城发电厂 化学制水过程 变频技术 变频器 化学除盐
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制水供水过程微机模糊控制系统初析
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作者 王明勇 《中国给水排水》 CAS CSCD 北大核心 1993年第5期35-37,共3页
1 前言 自来水制水过程极其复杂,而且受到诸多因素的影响,制水供水过程微机控制已在发达国家得到广泛应用,它不仅能提高自来水质量、降低生产能耗、保证供水,而且能够使工作人员从简单、枯燥的工作中解放出来。
关键词 自来 制水过程 微机 模糊控
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水厂控制系统EIC集成
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作者 谢兵兵 乔美荣 匡永江 《自动化仪表》 CAS 北大核心 1995年第7期19-23,共5页
简单介绍了饮用水的制水工艺、制水过程多级分布式控制方案及系统组成,具体以某水厂为例介绍了整个系统的集成和各监控站的组成与功能。文中提出,现代水厂控制系统的电气、仪表和计算机的一体化是可行的,也是必然趋势。
关键词 过程 批量过程 制水过程 系统集成 EIC
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基于Modbus现场总线的水厂集散控制系统 被引量:1
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作者 黄卫权 张唯 张航 《电气时代》 2011年第7期108-110,共3页
要实现制水过程的控制,深入了解制水工艺很有必要。限于篇幅,下面只将水厂工艺进行简单的介绍:饮用的自来水一般要经过由源水加混凝剂(矾液),在反应区反应,平流沉淀池沉淀,
关键词 集散控系统 Modbus 现场总线 平流沉淀池 工艺 制水过程 反应区
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基于HostLink通讯协议的制水流程测控网络系统 被引量:2
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作者 杨海清 李敏 杨海虹 《浙江工业大学学报》 CAS 2006年第2期190-194,共5页
针对地面水处理生产自来水流程工艺的特点,介绍了一种基于可编程控制器(PLC)HostLink通讯协议的微机可编程控制器(PC/PLC)两级制水流程工业测控网络系统,提出了一种网络测控系统的硬、软件设计方案和工程实现方法,介绍了测控网络系统的... 针对地面水处理生产自来水流程工艺的特点,介绍了一种基于可编程控制器(PLC)HostLink通讯协议的微机可编程控制器(PC/PLC)两级制水流程工业测控网络系统,提出了一种网络测控系统的硬、软件设计方案和工程实现方法,介绍了测控网络系统的硬件架构和各PLC子站模块和监测信号接入等功能配置.详细分析了HostLink通讯协议的硬件基础、构造形式和指令内容,以及用Visual Basic编程语言实现的上下位机间数据通讯软件模块设计.现场运行表明:该系统抗干扰能力强,性能优越,值得推广应用. 展开更多
关键词 HostLink协议 生产过程 测控网络 集散系统
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状态监测与诊断技术在水厂设备管理中的应用 被引量:1
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作者 陈爱青 《城市公用事业》 2005年第4期21-23,共3页
通过对制水过程中主要的设备进行状态监测,建立运行参数数据库,运用设备综合诊断技术,掌握运行动态,从而制定科学、经济、安全可靠的维修保养计划,提高设备利用率。
关键词 状态维修 状态监测 诊断技术 频谱分析 设备管理 应用 运行参数 设备利用率 制水过程
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化学除盐水站的节水改造及应用
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作者 陈岩 《节能》 2006年第5期53-55,共3页
通过对电厂化学除盐水系统运行过程中的水质进行化验分析,研究了回收再生清洗水,阴、阳床预运行水作为循环水补充水的方案。此系统改造及投用后,达到了化学除盐水站节约用水的目的。
关键词 火力发电厂 制水过程分析 质指标 改造
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人参鲜药干制/复水过程水分状态与化学成分变化规律研究 被引量:23
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作者 郑尧 雷蕾 +5 位作者 艾娇 梁帅 邓鑫 石柳 梅之南 任永申 《中草药》 CAS CSCD 北大核心 2019年第14期3302-3312,共11页
目的研究新鲜人参样品干制(干燥/蒸制)和复水(煎煮)过程中水分状态与含量变化以及有效成分含量变化规律,为优化中药干制/复水条件、科学判定过程终点提供技术支持,为探究中药鲜用/干用/制用差异提供新的科学视角。方法采用低场核磁共振... 目的研究新鲜人参样品干制(干燥/蒸制)和复水(煎煮)过程中水分状态与含量变化以及有效成分含量变化规律,为优化中药干制/复水条件、科学判定过程终点提供技术支持,为探究中药鲜用/干用/制用差异提供新的科学视角。方法采用低场核磁共振与成像技术(LF-NMR/MRI)测定不同工艺条件下样品水分随时间的迁移变化规律;采用HPLC法测定不同样品中人参皂苷类主要成分的含量变化。结果水分与化学成分含量测定结果显示,蒸制180 min时鲜参炮制充分,此时水分饱和、人参皂苷类成分变化趋于稳定、总皂苷含量较高;鲜参和新蒸制红参在不同温度下干燥12.5 h时,40℃下均未干燥彻底,50℃下生晒参仍含有3.02%的水分、红参已达干燥终点,60℃下二者均达到干燥终点,且50℃下二者人参总皂苷含量均最高,综合结果表明50℃热风干燥工艺更优;复水(煎煮)过程中,60min饮片水分充分饱和且人参总皂苷含量较高,优于30 min和120 min,为较优煎煮条件;鲜参在蒸制/干燥/煎煮等过程中水分及人参总皂苷含量均低于鲜品,提示鲜用对保存和发挥中药初始药效物质基础状态具有重要意义。结论采用LF-NMR/MRI与HPLC技术,重点关注人参鲜品在干制(干制、炮制)与复水(煎煮)过程中的水分与化学成分含量变化,为中药干制/复水终点判定与工艺条件优化提供了新的技术手段,也为阐释与探究中药鲜用/干用/制用理论提供了新的科学依据。 展开更多
关键词 中药干/复过程 分含量 分状态 低场核磁共振技术 化学指纹图谱 鲜人参 生晒参 红参
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A practical predictive control algorithm for integral processes and a case study in boiler level system 被引量:2
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作者 Zou Tao(邹涛) Liu Hongbo Li Shaoyuan 《High Technology Letters》 EI CAS 2005年第3期263-267,共5页
The Dynamic Matrix Control (DMC) algorithm tor integral processes is investigated in this paper. The reason why the original DMC algorithm cannot be applied to these processes is analyzed. The shifting matrix is tra... The Dynamic Matrix Control (DMC) algorithm tor integral processes is investigated in this paper. The reason why the original DMC algorithm cannot be applied to these processes is analyzed. The shifting matrix is transformed into another form and the corresponding theorem is proved, then its applicable range is extended. Compared with other algorithms on the integral processes, this algorithm is more practical and simple to implement. Simulation results also prove its validity. Applying this algorithm, we succeed in the control of the boiler level system in power units. 展开更多
关键词 integral processes predictive control dynamic matrix control shifting matrix
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Additive Manufacture of Ceramics Components by Inkjet Printing 被引量:18
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作者 Brian Derby 《Engineering》 SCIE EI 2015年第1期113-123,共11页
In order to build a ceramic component by inkjet printing, the object must be fabricated through the interaction and solidification of drops, typically in the range of 10–100 p L. In order to achieve this goal, stable... In order to build a ceramic component by inkjet printing, the object must be fabricated through the interaction and solidification of drops, typically in the range of 10–100 p L. In order to achieve this goal, stable ceramic inks must be developed. These inks should satisfy specific rheological conditions that can be illustrated within a parameter space defined by the Reynolds and Weber numbers. Printed drops initially deform on impact with a surface by dynamic dissipative processes, but then spread to an equilibrium shape defined by capillarity. We can identify the processes by which these drops interact to form linear features during printing, but there is a poorer level of understanding as to how 2D and 3D structures form. The stability of 2D sheets of ink appears to be possible over a more limited range of process conditions that is seen with the formation of lines. In most cases, the ink solidifies through evaporation and there is a need to control the drying process to eliminate the "coffee ring" defect. Despite these uncertainties, there have been a large number of reports on the successful use of inkjet printing for the manufacture of small ceramic components from a number of different ceramics. This technique offers good prospects as a future manufacturing technique. This review identifies potential areas for future research to improve our understanding of this manufacturing method. 展开更多
关键词 additive manufacture 3D printing inkjet printing ceramic components
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Variation of hydraulic gradient in nonlinear finite strain consolidation 被引量:1
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作者 谢新宇 黄杰卿 +1 位作者 王文军 李金柱 《Journal of Central South University》 SCIE EI CAS 2014年第12期4698-4706,共9页
In the research field of ground water, hydraulic gradient is studied for decades. In the consolidation field, hydraulic gradient is yet to be investigated as an important hydraulic variable. So, the variation of hydra... In the research field of ground water, hydraulic gradient is studied for decades. In the consolidation field, hydraulic gradient is yet to be investigated as an important hydraulic variable. So, the variation of hydraulic gradient in nonlinear finite strain consolidation was focused on in this work. Based on lab tests, the nonlinear compressibility and nonlinear permeability of Ningbo soft clay were obtained. Then, a strongly nonlinear governing equation was derived and it was solved with the finite element method.Afterwards, the numerical analysis was performed and it was verified with the existing experiment for Hong Kong marine clay. It can be found that the variation of hydraulic gradient is closely related to the magnitude of external load and the depth in soils. It is interesting that the absolute value of hydraulic gradient(AVHG) increases rapidly first and then decreases gradually after reaching the maximum at different depths of soils. Furthermore, the changing curves of AVHG can be roughly divided into five phases. This five-phase model can be employed to study the migration of pore water during consolidation. 展开更多
关键词 hydraulic gradient nonlinearity finite strain consolidation
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Flotation techniques for separation of diaspore from bauxite using Gemini collector and starch depressant 被引量:6
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作者 夏柳荫 钟宏 刘广义 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2010年第3期495-501,共7页
The floatability of diaspore and three kinds of silicate minerals,including kaolinite,illite and pyrophyllite,by a cationic Gemini surfactant as collector and starch as depressant was investigated as function of reage... The floatability of diaspore and three kinds of silicate minerals,including kaolinite,illite and pyrophyllite,by a cationic Gemini surfactant as collector and starch as depressant was investigated as function of reagents concentration and pulp pH.Further studies of artificially mixed minerals and bauxite ore were also detailedly conducted.At last,the pre-desliming reverse flotation separation process was adopted.It can be concluded that the combinational use of a Gemini cationic collector and the starch depressant is effective.The concentrates with Al2O3 to SiO2 mass ratio of 9.66 and the recovery of Al2O3 of 71.73% are obtained from natural bauxite ore(A/S=5.70) at pH value of around 10. 展开更多
关键词 DIASPORE BAUXITE reverse flotation Gemini surfactant
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Effects of the grinding process on the preparation and qualities of CWS 被引量:3
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作者 Yuliang Zhang Guoguang Wu +4 位作者 Xianliang Meng Zengjie Yun Frank Shi Yaqun He Xiaoqiang Luo 《Mining Science and Technology》 EI CAS 2011年第6期767-771,共5页
Two different grinding processes were examined to determine the effect grinding has on the quality of a CWS. A series of slurries was prepared from Australian (Au) and Chinese (YZ) coals. Both types of coal were groun... Two different grinding processes were examined to determine the effect grinding has on the quality of a CWS. A series of slurries was prepared from Australian (Au) and Chinese (YZ) coals. Both types of coal were ground by a Chinese (CUMT) and an Australian (JK) grinding process. The performance tests of the prepared CWS showed that fluidity of all slurries was acceptable. The concentration of the CWS from YZ coal ground by the CUMT grinding process was higher than when the JK grinding process was used. The highest concentration was 70.14% in this case. The concentration of the CWS prepared from Au coal by the JK grinding process was higher than when the CUMT grinding process was used. The highest con- centration in this case was 70.97%. These differences are caused by the particle size distribution devel- oped during the different grinding processes. 展开更多
关键词 Coal water slurry "Double-peak" gradation Slurry ability Grinding process Stability Fluidity
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Design and error estimates of cut tobacco feeding by wind system
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作者 Zhou xiao zhong 《International Journal of Technology Management》 2013年第3期94-97,共4页
The cut tobacco transporting is the absolutely necessarily important tache, Whether the transportation process stability is a direct impact on production quality and manufacturing standards. The wind system is adopted... The cut tobacco transporting is the absolutely necessarily important tache, Whether the transportation process stability is a direct impact on production quality and manufacturing standards. The wind system is adopted by most tobacco companies because of it caused least disruptive of the cut tobacco structure and the pipe network layout of system is flexible, but the wind system is greater influence by itself, different control methods are caused greater difference of process indicators, for example essence and spice ingredients, moisture proportion and smoke flavor. Based on the above reasons, so we need to design the control method of wind system necessarily, in addition we must checkout the control accuracy opportunely, so that it is satisfied by the actual working conditions. 展开更多
关键词 cut tobacco amount of supply and demand matching air leakage compensation prevent clogging of cut tobacco error estimates
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Cement industry control system based on multi agent
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作者 王海东 邱冠周 黄圣生 《Journal of Central South University of Technology》 EI 2004年第1期41-44,共4页
Cement production is characterized by its great capacity, long-time delay, multi variables, difficult measurement and multi disturbances. According to the distributed intelligent control strategy based on the multi (a... Cement production is characterized by its great capacity, long-time delay, multi variables, difficult measurement and multi disturbances. According to the distributed intelligent control strategy based on the multi (agent,) the multi agent control system of cement production is built, which includes integrated optimal control and diagnosis control. The distributed and multiple level structure of multi agent system for the cement control is studied. The optimal agent is in the distributed state, which aims at the partial process of the cement production, and forms the optimal layer. The diagnosis agent located on the diagnosis layer is the diagnosis unit which aims at the whole process of the cement production, and the central management unit of the system. The system cooperation is realized by the communication among optimal agents and diagnosis agent. The architecture of the optimal agent and the diagnosis agent are designed. The detailed functions of the optimal agent and the diagnosis agent are analyzed. At last the realization methods of the agents are given, and the application of the multi agent control system is presented. The multi agent system has been successfully applied to the off-line control of one cement plant with capacity of 5 000 t/d. The results show that the average yield of the clinker increases 9.3% and the coal consumption decreases 7.5 kg/t. 展开更多
关键词 AGENT multi agent system CEMENT PRODUCTION process control
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Evaluation of Porous Structure of Cement Pastes Made with Residual Rice Husk Ash
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作者 Joao Henrique da Silva Rego Antonio Alberto Nepomucenol +1 位作者 Enio Pazini Figueiredo Nicole Pagan Hasparyk 《Journal of Civil Engineering and Architecture》 2014年第11期1396-1402,共7页
In several countries, the residual RHA (rice husk ash) has been produced in rice processing industries or in thermoelectric plants that use rice husk to generate heat and/or electrical energy, usually without burnin... In several countries, the residual RHA (rice husk ash) has been produced in rice processing industries or in thermoelectric plants that use rice husk to generate heat and/or electrical energy, usually without burning process control. This causes a reduction in the amorphous silica content of residual RHA, which distinguishes them from the RHA produced according to controlled burning process, which is totally amorphous and considered a highly reactive pozzolan. In this paper, the hydration products and the porous structure of binders paste were studied by replacing, in weight of 5%, 10% and 20% of Portland cement OPC (ordinary Portland cement), by residual RHAs named A and B, which have high and low content of amorphous silica, respectively, using microstructure evaluation techniques as XRD (X-ray diffraction), TG (thermogravimetric) tests and MIP (mercury intrusion porosimetry). A reducing the size of the pores of the pastes was observed according to the increase of content replacement of RHA A and RHA B. 展开更多
关键词 Mineral addition residual rice husk ash pozzolanic activity porous structure microstructure.
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Experimental Study of Double Diffusion in Binary Solution
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作者 Aroussia Jaouahdou Mohamed Jomaa Sail 《Journal of Energy and Power Engineering》 2012年第10期1619-1623,共5页
Application of temperature gradient to a binary solution can work as a separation process like freezing desalination. Initial salinity is an important parameter on the final composition of the water obtained. In this ... Application of temperature gradient to a binary solution can work as a separation process like freezing desalination. Initial salinity is an important parameter on the final composition of the water obtained. In this paper, the authors study experimentally the effect of the concentration in aqueous solution on the double diffusion with phase change. NaCI-H20 solution at different salinity is frozen in a rectangular cavity to obtain ice becoming fresh water. Temperature, concentration and rate growth of the interface ice/brine are presented. Three concentrations are tested: 0.02%, 1% and 3.5%. 展开更多
关键词 SOLIDIFICATION binary solution VISUALIZATION ice thickness.
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