铸钢厂水处理系统中泵的控制

介绍了鞍钢机总铸钢厂水处理系统中的网络配置、软启动器系统的性能及水泵的逻辑控制等。     

ACS800系列变频器在新中棒水处理电控系统中的应用

介绍了通过变频器的手自动宏实现对变频器的现场总线控制和功能端子控制,将这种控制模式成功地应用于新中棒水处理电控项目中,为新中棒水处理系统高效、节能的稳定运行发挥了非常重要的作用。     

建立进厂水处理药剂管理制度,控制用药质量

为有效地控制冶金企业大量消耗使用的水处理药剂的质量,宣钢动力厂建立了进厂药剂管理制度,首次在宣钢实现了对水处理药剂的质量评定,取得了较好的效果。     

热轧薄板淬火水处理水温水质控制工艺

热轧精整热处理薄板是一种非常具有市场潜力的产品,其淬火工艺对冷却水的水温和水质控制要求很高。介绍了一种水温与水质控制工艺,在节约能源、降低投资的同时,达到淬火机冷却水的使用要求,并经过工程实践的检验,是一种应用前景广阔的热处理薄板水处理工艺技术。     

中厚钢板控制冷却系统的设计

1 控制冷却系统的组成及设计原则 一个高水平的控制冷却系统应由供水及水处理系统、钢板冷却装置和钢板冷却计算机控制系统三大部分组成。 供水及水处理系统包括:供水泵、主管路、高位水箱、流量调节阀、提升水泵、过滤器、冷却塔及中和水池等。 钢板冷却装置包括:上部层流喷射集管,下部低压喷射集管,压力调节阀(手动),开闭控制阀,     

砂石过滤器反洗防跑料控制技术及应用

针对鞍钢1780线水处理砂石过滤器反冲洗时存在的跑料问题,对过滤器反冲洗控制系统和设备进行了改进,并首次采用过滤器液位控制与压力、流量控制相结合的控制方式,完善反冲洗控制程序,解决了跑料问题,确保了1780生产线水质稳定,对提高带钢的表面质量起到积极作用。     

追日电气电动机智能软起动节能控制装置被列入重点国家级火炬计划

日前，追日电气公司MSCC系列电动机智能软起动节能控制装置被列入2006年重点国家级火炬计划项目，这是该产品继2004年被列入“国家级火炬计划项目”后获得的又一项殊荣。MSCC系列智能软起动节能控制装置集智能强力矩变频软起动、降压软起动、运行节能控制功能于一体，可广泛应用于石油化工、冶金、建材、纺织、供水与水处理、矿山、机械等行业中小型鼠笼式异步电动机的软起动与节能控制。     

珠钢 CSP水处理浊循环水系统日常处理

简述了珠江钢铁公司CSP水处理浊循环水系统的基本概况，重点叙述了微生物控制和水中油类控制的方法及效果。     

轧钢水处理系统可编程控制器（PLC）的配置与调试

本文简要介绍苏兴特钢工程轧钢水处理的工艺流程及其自控检测仪表,重点针对浊水循环系统高速过滤器PLC控制的配置及功能调试作论述。     

高效变频调速系统在太钢二钢连铸冷水系统中的应用

介绍了通用变频器在水泵上应用的节能原理,及其在连铸水处理二冷水系统的应用及功效。重点叙述了恒液位系统和恒压刀系统的构成及控制原理,以及本系统的应用和取得的经济效益。     

烧结球团链篦机循环水水质处理工艺改造

铜陵有色循环经济工业园球团项目链篦机冷却用水水质处理方式为,在循环水泵出水管设置一体化离子棒水处理器,运行半年在链篦机高温段出现明显结垢,回水温度高,设备冷却效果差,为改善这一情况,将系统进行管道改造和化学清洗,增加药剂处理,改造后水冷却效果良好,保证正常生产。     

Evaluation of Closed-Loop Site-Specific Irrigation with Wireless Sensor Network

Automated site-specific sprinkler irrigation system can save water and maximize productivity, but implementing automated irrigation is challenging in system integration and decision making. A controllable irrigation system was integrated into a closed-loop control with a distributed wireless in-field sensor network for automated variable-rate irrigation. An experimental field was configured into five soil zones based on soil electrical conductivity. In-field soil water sensors were installed on each zone of the distributed wireless sensor network and remotely monitored by a base station for decision making. The soil water sensors were calibrated with a neutron probe and individually identified for their response ranges at each zone. Irrigation decisions were site-specifically made based on feedback of soil water conditions from distributed in-field sensor stations. Variable-rate water application was remotely controlled by the base station to actuate solenoids to regulate the amount of time an individual group of sprinkler nozzles was irrigating in a 60-s time period. The performance of the system was evaluated with the measurement of water usage and soil water status throughout the growing season. Variable water distribution collected in catch cans highly matched to the rate assigned by computer with r2 = 0.96. User-friendly software provided real-time wireless irrigation control and monitoring during the irrigation operation without interruptions in wireless radio communication.     

多晶硅生产冷却循环水系统及水质控制技术

多晶硅生产过程的冷却循环水系统主要用来为物料降温,一般分为开式循环水系统和闭式循环水系统.开式循环水系统主要工艺部件是开放式的,补水来源一般为工业软化水,循环水在运行过程中会发生CO2含量降低、碱度增加、pH值升高、浊度增加等情况,需要对冷却水的指标进行监测和控制,并选择适合的水处理药剂进行投加.闭式循环水系统为密闭系...     

Regional Water Management Modeling for Decision Support in Irrigated Agriculture

Efficient water management is one of the key elements in successful operation of irrigation schemes in arid and semiarid regions. An integrated water management model was developed by combining an unsaturated flow model and a groundwater simulation model. These combined models serve as a tool for decision making in irrigation water management to maintain the water tables at a safe depth. The integrated model was applied on a regional scale in Sirsa Irrigation Circle, covering about a 0.42 million ha area in the northwestern part of Haryana, India, which is faced with serious waterlogging and salinity problems in areas underlain with saline ground irrigated by the canal network. The model was calibrated using the agrohydrologic data for the period 1977–1981 and validated for the period 1982–1990 by keeping the calibrating parameters unchanged. The model was used to study the long-term impact of two water management interventions related to the canal irrigation system—change in pricing system of irrigation water, and water supply according to demand—on the extent of waterlogging risk. Both of these strategies, if implemented, would considerably reduce aquifer recharge and consequently waterlogging risk, compared to the existing practice. The water supply according to demand strategy was slightly more effective in reducing aquifer recharge than the water pricing intervention. The implementation of the proposed water pricing policy would pose no problem in fitting into the existing irrigation system, and thus it would be easier to implement, compared to the water supply according to demand strategy, when taking technical, financial, and social considerations into account.     

微孔复合管膜净化连铸冷却水的应用

钢铁企业传统的净化连铸冷却水的过滤器过滤效果差,影响生产和产品质量。通过实验,定性和定量地研究了多孔复合材料的微观形貌、构成材料的颗粒的粒径、空隙大小、多孔复合材料的渗透率以及水滴、油滴在多孔复合材料上的润湿性,对材料和过滤操作进行改进。改造后的过滤机以多孔复合管为核心,集过滤、反冲洗再生、排渣为一体。陶瓷复合膜过滤投入使用后,水质明显提升,基本达到了指标要求,提升了整体水处理系统的技术水平,取得了显著的经济效益。     

辊底式热处理炉过程控制系统及应用

以南钢辊底式热处理炉为研究对象,全面分析了其过程控制特点。并以辊底式热处理炉数学模型为基础,实现了辊底式热处理炉的计算机优化控制。该辊底式热处理在线优化控制可实现炉内钢板位置的实时跟踪、温度的动态计算、最佳炉温优化及在线反馈修正、钢板装出炉在线修正等功能,最终实现了全线计算机控制系统网络。     

PCAuto2.62组态软件在污水处理自控系统中的应用

本文介绍了三维力控的组态软件PCAuto2．62在污水处理自控系统中的应用及污水自控系统的构成、功能及应用效果，本系统将工控软件和智能仪表、变频器、PID结合起来，设计出一个完整的工程监控系统，达到了恒压供水及远程监控的功能。     

石灰石矿工控管理网络系统的设计

介绍了天铁集团石灰石矿工控管理网络系统的设计目标原则、系统组成以及软硬件配置和安全策略，实现了管控一体化，满足了石灰石矿工控管理网络系统的要求。     

Legal Issues of Integrated Network for Construction and Real Estate Sector

In Singapore, one of the most important steps in the overall information technology strategy for the construction and real estate sector is the development of an integrated network for the sector to cover the entire life cycle of any development. It is the first of its kind in the world. The productivity and competitiveness of the construction and real estate sector have been greatly enhanced through the introduction and implementation of the adopted integrated network since 2002. Some of the legal issues related to the integrated network are global trading, contract enforceability, liability risks, security breaches, and intellectual properties protection, a lack of alignment in jurisdictions, confidentiality, legal liability, and service dependency risks. The paper addresses online security and legal issues related to the integrated network for the sector to establish trust and confidence among the end users of the system. Some of the legal issues encountered during the implementation and lessons learnt will also be briefly discussed.     

湘钢2~#高炉控制系统设计

主要论述了高炉工艺设备对控制系统的要求,湘钢2#高炉控制系统的网络设计、热备冗余控制系统的组成以及应用效果。