从精苯酸焦油废液中提取水泥减水剂的研究

研究了从精苯焦油废液中提取水泥减水剂的工艺过程．系统地分析了提取产品的各项物性指标．应用试验表明．对水泥的减水率达２０％．同时水泥的抗折强度和抗压强度均有所提高．由此可以看出该提取物是一种优良的水泥减水剂．     

有机硅防水涂料的研制与施工

研制了一种新型有机硅防水涂料。涂料中的有机硅分子与基材表面的羟基紧密结合,形成网状疏水性硅氧烷膜,成为一种防水性、耐久性优的防水剂。介绍了该产品的配方组成、工艺流程、施工工艺及产品技术指标等。     

PREPARATION OF HYDROTHERMALLY TREATED LRC/WATER FUEL SLURRIES

The hot-water coal drying process is a means of thermally beneficiating and dewatering lignite and subbituminous coal for the purpose of preparing dense low-rank coal/water fuel. In hot-water coal drying, which is a form of hydrothermal treatment, low-rank coal in a water slurry is treated at elevated temperatures of 513 to 623  K and at pressures in excess of the equivalent saturated steam pressures lo minimize vaporization of the water. This produces a coal product which contains less than one-third the inherent moisture of the raw coal and which is resistant to moisture reabsorption. The hydrothermally treated coal/water slurry resulting from the process can be concentrated by mechanical means (centrifuge, pressure filter)to form a pumpable coal/water fuel with greater than 60 weight percent bone-dry solids content and with an energy content greater than 15·4 MJ/Kg (6600 Btu/lb). Hydrothermal treatment also beneficiates the coal by reducing oxygen and minerals. Over 94 percent of the energy content of the raw coal remains in the product. Low-rank coal/water fuel is typically a pseudoplastic fluid, and for some low-rank coals, the slurry is stable towards settling, without the use of additives.     

高层建筑中生饮水的开发应用

本文简述反渗管（ＲＯ）系统在高层建筑中生饮水的开发应用,勃勃了有关的工艺过程和工艺参数及设备选型。根据选用的工艺过程,参数以及设备,运行和测试结果达到了要求,不质符合国家生饮水的标准,整套系统能全自动运行。     

反渗透制水的低温影响及对策

通过对反渗透(RO)进水进行预热的生产性试验，探讨了产水量随温度、压力的变化规律，分析了预热和升压两种措施各自的优势和不足，并就反渗透制水工艺设计及运行管理提出了一些建议。     

PERIODIC AND CONTINUOUS MEASUREMENT OF WATER CONTENT OF POTATO STARCH

ABSTRACT

Application of fast electric methods of measurement of potato starch water content has been carried out. Preliminary studies showed that the optimal method for the estimation of water content of potato starch was the measurement of sample conductivity. The relation between the temperature, pouring density of sample and the content of electrolytes in the starch sample, was evaluated prior to the present study. The results obtained from those experiments were used for designing of the electronic system of water content estimation by means of the measurement of sample conductivity. The laboratory measuring system has been built, which enabled the measurement of starch water content from 15 to 25 %. The industrial sensor system for continuous measurement of starch water content has also been built and tested in the factory system of automatic control of starch drying process. The water content of the product leaving dryer was automatically controlled by the quantitative dosing of wet starch of known water content to the dryer.     

国外城市给水处理技术实例

介绍了国外多个城市废水处理的现状和技术特点，提出了我国现阶段城市给水厂应采取的措施，包括：采取合适的工艺流程，不超负荷运行，重视混凝工艺和水厂自控系统维护及水质检测等.     

水夹点分析与数学规划法相结合的用水网络优化设计

提出了水夹点分析和数学规划法相结合的用水网络最优设计法。水夹点分析基于对过程用水的理解,获得新鲜水用量目标并给出用水网络设计的基本规则。在此基础上建立过程使用新鲜水、排放废水和回用的各种可能匹配方案的用水网络超结构及其MINLP模型。既避免了用水夹点综合设计用水网络得不到真正意义上的最优解,又在一定程度上防止超结构规模过大,MINLP维数太高,求解困难。采用通用代数建模系统GAMS得到用水网络最优设计方案。文献中的应用实例表明,本文所提方法可充分发挥水夹点分析确定新鲜水用量或回用结构的简洁实用性和超结构MINLP寻求最佳方案的优点。     

聚乙烯系高吸水树脂的应用前景

介绍了聚乙烯醇（ＰＶＡ）系高吸水树脂的国内外研究开发情况。对ＰＶＡ 系高吸水树脂与其它类型高吸水树脂相比的性能特点进行了详细描述。结合市场潜力与生产成本的分析,对ＰＶＡ 系高吸水树脂的应用前景作了展望。