水喷淋系统的研究

针对HiB电工钢生产中水喷淋系统出现的问题，本文从理论上进行了分析和研究，其结果可供有关部门决策对参考。     

Mathematical model for cooling process and its self-learning applied in hot rolling mill

Control precision of coiling temperature is one of the key factors affecting the profile shape and surface quality during the cooling process of hot rolled steel strip. For this reason, the core of temperature control precision is to establish an effective cooling mathematical model with self-learning function. Starting from this point, a cooling mathematical model with nonlinear structural characteristics is established in this paper for the cooling process of hot rolled steel strip. By the analysis of self-learning ability, key parameters of the mathematical model could be constantly corrected so as to improve temperature control precision and adaptive capability of the model. The site actual application results proved the stable performance and high control precision of the proposed mathematical model, which would lay a solid foundation to improve the steel product qualities.     

置换通风加冷却顶板系统存在的问题及解决措施分析

介绍了置换通风加冷却顶板空调系统,分析了冷却顶板所承担制冷量的大小和冷板在顶棚的位置对室内气流的影响,总结了针对该系统结露问题的解决措施,为该系统在工程上的应用提供一定参考。     

复方板蓝根喷雾剂急性毒性反应的研究

目的：通过小鼠对复方板蓝根喷雾剂的急性毒性反应研究,对安全性评价提供理论依据。方法：通过预实验,判断测定LD50的可能性,并且获得LD50或MTD0结果：LD50结果显示无小鼠死亡情况,MTD结果表明小鼠给予最大浓度最大体积,即80g／kg体质量,相当60kg成人临床日用量160倍。结论：本实验表明复方板蓝根喷雾剂毒性较小。     

凝结水中溶解氧超标原因分析及处理

某火力发电厂2号机组凝结水中的溶解氧含量在冬季供暖期间一直不能达到合格范围,溶解氧合格率逐月下降.针对凝结水溶解氧超标问题进行全面排查调整,查找出了机组凝结水溶解氧超标的原因并对存在的问题进行处理,最后总结出凝结水溶解氧超标的调整方法.     

一种机房水冷空调节能系统的设计方案

目前节能降耗已经成为各行业共同的目标,本文提出的方案主要是通过对空调室外机进行改造,对机房流出的循环水进行自然冷却,使空调在冬季减少开机时间,在保证机房中设备正常运行的同时能有效地降低能源消耗。     

8PQ200—3．8型移动式机动喷雾车研制

针对我国南方丘陵山区缺乏适宜施药机具的问题。设计了基于适宜丘陵山区的8PQ200—3．8型移动式机动喷雾车。该型喷雾车的设计是利用三维机械设计软件进行优化设计,整机由即时混药动力系统和喷雾车系统两部分组成,两系统分开设置且能单独移动,通过高压软管把两个系统连接为一体,能够满足丘陵山区不同农作物、果树苗木即时混药喷施的病虫害防治功能。样机经田间试验表明,能极大地节省人工,降低劳动强度和作业成本,生产效益和经济效益明显。     

水质稳定的技术经济分析——以邢钢钢厂循环冷却水为例

对邢台钢铁公司炼钢厂的转炉和连铸循环冷却水的水质稳定进行了技术经济分析.在分析的基石出上采取了一些措施,使投药费用大大下降,收到了良好的技术经济效果.     

Numerical Analysis of Influencing Factors on Temperature Field and Airflow Distribution of the Displacement Ventilation System

Indoor air quality and thermal comfort are important features of indoor environment, In this paper, a numerical simulation based on the k-ε model of CFD is used to analyze factors such as loading, exterior-protected construction, blowing-in rate that play an important role in the temperature field and airflow field of the displacement ventilation system. Exterior-protected construction has little influence on indoor temperature distribution of displacement ventilation systems and the influence is limited only in a small area near the external wall when the indoor heat source is the main cooling load. The height of a room has little influence on indoor temperature field, and the temperature gradient of active region is basically unchanged. In the system combined with a displacement ventilation system and a cooling system, the height also has little influence. When the cooling load is high,the indoor heat source creates a strong convective plume, which will make the average indoor air age lower, the ventilation efficiency higher and the elimination of pollutant easier. Air supply rate plays an important role in displacement ventilation systems. The increase of air supply rate that can be realized by increasing the air supply velocity and enlarging the area of air inlet will increase the mass capability of the system and diminish the vertical temperature gradient. From the comparison between simulations and experiments, it is concluded that this simulation are creditable.     

离心喷射沉积钛铝金属间化合物的研究

采用一种新型的离心喷射沉积(CSD)成形技术制备了Ti—48A1—2Mn—2Nb金属间化合物，较系统地研究了该合金的微观组织结构以及室温拉伸、压缩和断裂韧度等力学性能，探讨和研究了该合金制备过程中形成的孔隙、特殊层片状组织及对材料性能的影响规律。图像分析系统定量测试结果表明，CSD制备的金属间化合物的孔隙率在2％左右，热等静压(HIP)有效地消除了合金在喷射成形制备中产生的孔隙，致密度达99.6—99．9％。性能研究结果表明，CSD制备的Ti—48A1—2Mn—2Nb合金具有良好的室温拉伸、压缩和断裂韧度等性能，尤其是压缩性能和断裂韧度值，显示了很好的应用前景。