共查询到18条相似文献,搜索用时 171 毫秒
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由于高含盐采出水中氯离子浓度和矿化度很高,为了实现油田高含盐采出水的回注,除了降低石油类、COD和SS的含量外,还要去除其中大量的无机盐类。文章研究了对某油田高含盐采出水采用冷冻脱盐技术的处理效果,通过对模拟水和实际采出水进行脱盐实验,对影响冷冻速率的因素,冷冻脱盐效率和重力脱盐效率进行了研究。冷冻脱盐法直接脱盐率为50%以上,通过进一步静置,最终的脱盐率可达到60%以上。较高的初始温度、缩短水从液态冷冻到固态的时间、延长重力脱盐时间,能获得更好的脱盐效果。 相似文献
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钢铁企业是用水大户,节约工业新水量、降低吨钢耗新水指标已经成为钢铁企业节能减排的重要任务之一。雨水作为一种重要的淡水资源,日益受到钢铁企业的重视。开发利用雨水资源是钢铁企业摆脱有限水资源束缚、可持续发展的重要出路之一。本文从实际情况出发,对钢铁企业雨水资源应用的前景和需要解决的问题作了初步的分析。 相似文献
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浅谈钢铁企业工业污水处理现状和存在的问题 总被引:4,自引:0,他引:4
文章对钢铁企业工业污水处理现状和存在的问题进行了初步的分析和探讨。指出我国钢铁工业要进一步降低钢铁企业吨钢耗用新水量、提高钢铁企业水的重复利用率,需要积极推广应用少水或不用水的工艺技术装备,并应强化合理串级用水,以及加强工业污水的综合处理回用。 相似文献
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砂过滤器是一种传统而高效的水处理设备,广泛应用于钢铁企业循环水系统。目前钢铁企业最常用的砂滤器是高速或中速砂过滤器。本文结合新型浅层砂过滤器的应用,对余压过滤系统技术(余压全滤、余压旁滤)应用于钢铁企业循环水系统进行了分析,并对具体的设计方法进行了详细的介绍,可供实际生产和工程建设参考。 相似文献
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胜利油田污水回注处理及资源化利用新技术研究 总被引:1,自引:1,他引:1
胜利油田目前随着"三次采油"的进行以及环保要求的日益严格,采出水处理技术面临空前挑战。文章介绍了胜利油田采出水水性特点,水量组成,水质需求;重点介绍了常规污水处理、稠油污水处理、强腐蚀性污水处理等污水处理技术以及"双膜"脱盐工艺、"热法"脱盐工艺等污水资源化利用技术。为加强污水资源化、污泥无害化的技术研究与推广应用提供技术支撑。 相似文献
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污泥堆肥工程曝气系统的设计与选型比较 总被引:1,自引:0,他引:1
曝气系统作为污泥好氧堆肥工艺流程的主要组成部分,对项目的技术经济可行性有着重要影响。本文通过比较分散供气和集中供气形式,推荐采用分散供气形式作为系统形式;通过比较离心通风机、多级离心风机和罗茨风机,推荐采用离心通风机作为气源设备。 相似文献
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Dai Tiejun 《Resources, Conservation and Recycling》2011,55(8):760-771
An iron resource efficiency is proposed to define a measure of the natural iron resources saved in the steel manufacturing process. A simplified iron flow diagram is presented for the steel manufacturing process. The influences of various deviations in iron flow from the simplified iron flow diagram on iron resource efficiency are analyzed. The relationships between iron resource efficiency of unit processes and the final product are also discussed. As an example, data from a steel plant are used to analyze the influence of iron flow on its iron resource efficiency of finial product in the steel manufacturing process, the influence of iron resource efficiency of unit process on iron resource efficiency of the final product, and give some measures to improve the iron resource efficiency of the steel manufacturing process. 相似文献
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钢铁行业的低碳转型对于我国实现碳达峰碳中和目标具有至关重要的作用,有必要提前研究“双碳”目标下中国钢铁行业的发展路径及技术路线图。本文回顾了中国钢铁行业发展的历史趋势;归纳了钢铁行业实现低碳发展的主要技术选择;基于文献调研汇总了近年来关于中国钢铁行业低碳发展路径的相关研究,并总结了不同研究对钢铁未来低碳路径中关键参数的判断,包括粗钢产量、废钢资源量、电炉炼钢比例、低碳技术应用、能耗强度、二氧化碳排放等,同时分析了不同研究得出的普遍认识和主要差异。在研究中我们也简要分析了中国钢铁转型路径与全球钢铁转型路径之间的异同。基于上述分析,本文提出了“双碳”目标下中国钢铁行业发展路径的研究需求。 相似文献
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Eduardo B. Faria 《Natural resources forum》1991,15(4):270-275
This paper discusses how world steel production and seaborne iron ore trade have grown since 1950. The role of steel production forecasts in determining investment in the iron ore industry is examined. Forecasts for world steel production and the demand and supply of seaborne iron ore in the 1990s are presented. It is predicted that world steel production will increase by 64 million tons between 1991 and 2000. This increase will be located principally in the developing countries and China. The corresponding increase in seaborne iron ore trade will be approximately 55 million tons. Expansion projects will be located mainly in Australia and Brazil, but no greenfield iron ore projects will be undertaken. By the end of the decade, the demand for seaborne iron ore will be equal to its supply. 相似文献
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Using a time-varying stochastic frontier model, this paper examines the technical efficiency of firms in the iron and steel industry to try to identify the factors contributing to the industry's efficiency growth. Industry observers and policymakers tend to cite most frequently three possible sources of efficiency growth: privatization; economies of scale; and vintage of equipment. Our study corroborates these factors. Based on our findings, which pertain to 52 iron and steel firms over the period of 1978–1997, privatization is likely to improve the efficiency of iron and steel firms to a great extent as evidenced in various industries. This study also provides systematic evidence that iron and steel production shows economies of scale. In addition, newer vintages of equipment are found to be closely correlated with higher levels of efficiency. This clearly indicates that investment in new plants and equipments is critical in pursuit of efficiency in the iron and steel industry. 相似文献