共查询到18条相似文献,搜索用时 109 毫秒
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以辽河油田的含油污泥为研究对象,提出了利用车用废润滑油高温置换脱水的新方法。本文对置换脱水过程中,废油在含油污泥内部的渗透情况进行了研究,并考察了油温、含油污泥样品尺寸及初始水含量等因素对脱水过程中含油污泥油、水含量变化的影响。研究结果表明,在置换脱水过程中,吸入的车用废润滑油首先进入含油污泥试样表面,随后逐渐向内部渗透;含油污泥样品的油含量随时间延长经历减量期、增量期及基本恒定期三个阶段,其中增量期为吸油的主要阶段。油温及试样尺寸等因素对置换脱水过程中含油污泥样品的油含量有一定的影响,但对脱水含油污泥样品的最终油含量影响不大;含油污泥的最终油含量受其初始水含量的影响较大。因此,通过对含油污泥试样进行预干燥处理,可有效减少其在废油置换脱水过程中的吸油量。 相似文献
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含油污泥的特点以及除油脱水方法的浅析 总被引:2,自引:0,他引:2
含油污泥主要在石油开采、运输、炼制以及含油污水处理过程中产生。文章综述了含油污泥的产生方式以及特点,重点介绍了含油污泥的常规处理方式和机理,分析和探讨了现状含油污泥除油脱水的常规工艺效果。通过分析表明,各种处理方法对含油污泥的都有其自身的特点以及适用范围。因此,在选择工艺时,必须从污泥的特性、有无废热可利用以及整个处理、处置系统的关系等方面综合考虑合适的处理工艺。 相似文献
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采用先进的离心脱水工艺技术处理炼油厂的含油污泥和非含油污泥,通过对污泥脱水装置的技术改造,经过3年连续生产的检验,运行稳定,操作方便,自动化程度高,各项指标均达到了设计值,从而解决了污泥对环境污染问题。 相似文献
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为了确定伊拉克某油田污水处理站含油污泥处理设备,对比分析了板框式压滤机、带式压滤机、离心式脱水机和叠螺式脱水机等常用含油污泥机械脱水设备的技术特点和应用范围,并对叠螺式脱水机实际运行情况进行了现场调研。分析和现场调研结果表明,叠螺式脱水机集污泥浓缩和脱水于一体,具有出泥含水率低、占地面积小、易分离、不堵塞,可以实现自清洗,可用于低浓度污泥等特点,叠螺式脱水机简化了油田污泥处理工艺流程,降低了地面工程建设投资及运行成本,是含油污泥进行脱水的较好选择。介绍了伊拉克某油田污水处理站含油污泥叠螺式脱水机的选型设计。 相似文献
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为保证离心脱水机对含油浮渣的处理效果,对气浮混凝剂聚合氯化铝和聚合硫酸铁进行混凝试验。试验表明,聚合硫酸铁能够处理含油污水处理装置的含油污水,尤其适合较高含油量的含油污水的处理,其气浮渣的离心脱水性能优于聚合氯化铝。研究结果可以为实际的工业生产提供指导 相似文献
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阐述了炼油厂污泥的来源及特性,从工作原理、工艺流程和运行成本3方面对叠螺脱水机与离心脱水机进行了比较分析。2种污泥脱水机均适用于含油污泥(主要成分是浮渣)、剩余活性污泥的脱水处理;离心脱水机主要是依靠转鼓高转速产生的离心力使具有一定密度差的泥水分离,而叠螺脱水机主要是依靠螺杆的挤压来实现污泥脱水;离心脱水机必须配套污泥输送泵、比重剂加药设备;叠螺脱水机在运行成本上占有明显优势,还可以显著改善运行中对工作环境的污染。基于叠螺脱水机运用螺杆挤压原理实现污泥脱水,该设备不适用于含较大硬度颗粒的污泥脱水。 相似文献
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分析了炼油厂“三泥”性质和脱水预处理对策,介绍了叠氏污泥脱水机特点原理及处理炼油企业“三泥”的典型应用实例.当处理罐底泥时,进料含水率在86.7%~90.2%时,经叠氏污泥脱水机脱水后泥饼含水率降为54.2%~55.9%;当处理剩余活性污泥时,进料含水率在95.5%~97.5%时,经叠氏污泥脱水机脱水后泥饼含水率降为78.0%~79.0%;当处理浮渣时,进料含水率在90.5%~92.0%时,经叠氏污泥脱水机脱水后泥饼含水率降为67.9%~68.7%.所处理物料的脱水泥饼的含水率均低于80%,满足污泥迸一步处理前的脱水需求,与离心机相比节电在1/10以上. 相似文献
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R. Girault G. Bridoux F. Nauleau J.-C. Mégnien F. Béline E. Dieudé-Fauvel 《Drying Technology》2015,33(11):1295-1301
To optimize the anaerobic digestion process of residual sludge, co-substrates addition and pre-treatments are increasingly being employed. Nevertheless, if these processes allow the optimization of biogas production, they can significantly impact the efficiency of mechanical dewatering processes for digested sludge. In this article, the impact of co-substrate addition (oily sludge) and thermal pre-treatment on the efficiency of mechanical dewatering of digested sludge was investigated. To this purpose, mechanical dewatering experiments were conducted at lab-scale by using a filtration-compression cell to determine the limit dryness of various digestates. In addition, control factors of the mechanical dewatering efficiency of digested sludge were investigated. Results highlight that 67% of the variance of the limit dryness of digestates is due to the variable “volatile solid/total solid ratio.” 相似文献
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污泥脱水是减小污泥体积的关键工艺技术,而枵泥脱水设备的选型对污泥脱水效率的高低和脱水工艺的正常运行最为重要。文章以广州某水厂为例,在介绍常见污泥脱水设备的基础上,选择了合适的污泥脱水设备,在污泥脱水工艺流程中发挥了稳定的脱水效果,该厂的污泥脱水问题也得到了有效的解决。 相似文献
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Jung Eun Lee 《Drying Technology》2014,32(2):156-166
Real-scale thermal filter press dewatering equipment (plate size: 630 mm × 630 mm) was installed and operated at a waterworks for one year in an attempt to achieve sludge reduction. During the period, the dewaterability was evaluated according to the seasonal sludge properties in order to compare the dewaterability of thermal dewatering and mechanical dewatering, as well as to determine the economics of thermal dewatering. According to the results, the winter season sludge showed a 36% decrease in water content and a two-thirds reduction in dewatering velocity compared to the summertime sludge. In addition, the dewatered cakes of the thermal filter press dewatering equipment showed a lower specific cake resistance and water content in the dewatered cakes than the mechanical filter press dewatering equipment, indicating superior dewaterability. This was attributed to the easier removal of the filtrate remaining in the capillary tubes due to thermal dewatering. The energy consumption for thermal dewatering was 300 kJ/dry solids (DS) kg. A comparison of the sludge dryers indicated that it is possible to produce dewatered cakes that consume less energy and can be recycled. According to the performance evaluation results, the real-scale thermal filter press dewatering equipment had high adaptability to the changes in seasonal sludge, showing excellent dewaterability compared to the mechanical filter press dewatering equipment, and was economical due to the lower energy consumption. 相似文献