Reuse and Reproduction of Used Refractories

1 Introduction About9 millions tonnes of refractories are consumed in China annually owing to the rapid development of the metallurgical industry, from which more than 4 million tonnes of used refractories are inevitably generated. Most of used refractori…     

UPR增强废旧PP研究

本文在研究废旧PP的加工热稳定行为的基础上,将UPR预固化处理后与废旧PP熔体共混,制备PP／UPR共混材料。研究结果表明,UPR在基体中以颗粒分散的形式存在,其加入可以大幅度提高体系的力学性能;此外,共混体系的力学性能改善应部分归于UPR诱导PP结晶。     

压裂返排液循环再利用影响因素

压裂返排液为油田主要污染物之一,将压裂返排液处理后再用于配制压裂液,对油田环境保护和节约成本都具有重要意义。以长庆油田某水平井现场压裂返排液为研究对象,分析了不同时段压裂返排液的组成性质,研究了压裂返排液中无机离子、固体颗粒和残余添加剂对循环利用的影响,并提出了相应的消除方法。研究结果表明:长庆油田某水平井现场压裂返排液中Ca2+、Mg2+含量低,不影响重复配液;Fe2+、Fe3+和固相颗粒含量高,通过"氧化-絮凝沉降-过滤"可有效降低;残余交联剂使得重复配制压裂液基液黏度过高,可通过三乙醇胺与葡萄糖按1∶9比例复配进行有效掩蔽;残余破胶剂影响重复配制的压裂液耐温性能,建议现场适量使用破胶剂。因此,压裂返排液通过除铁、除固相颗粒、掩蔽残余交联剂处理后可实现循环再利用。     

Sulfur capture for fluidized-bed combustion of high-sulfur content lignites

Sulfur release and capture behavior of lignites with highly combustible sulfur-contents were investigated by extending a previously-developed comprehensive model to incorporate sulfur retention. The predictive performance of the model was tested by comparing the model predictions with on-line concentration measurements of O₂, CO₂, CO and SO₂. Favorable comparisons are obtained between the predicted and measured concentrations of gaseous species along the combustor. Results show that freeboard sulfur-capture is enhanced significantly with recycling of elutriated sorbent particles as the sulfur release to the freeboard is significant for fuels rich in combustible sulfur.     

2010年上海世博会日本产业馆结构“再利用”概念设计

2010年上海世博会日本产业馆建于原江南造船厂船体联合车间内,其结构设计贯彻"再利用"理念,采用新建柱下独立基础与原有厂房混凝土地坪协同工作的基础形式,钢结构连接节点尽量采用可拆卸的高强螺栓,使用过程中保留脚手架钢管作为结构抗侧力构件,实现了世博会多样化建筑特色、"再利用"基本理念、绿色环保以及结构设计经济安全的有效结合。     

重整循环氧压缩机操作优化分析

针对重整循环氢离心压缩机运行状况进行了分析,制定了优化措施,通过不停工清洗重整循环氢离心压缩机入口过滤网的成功实施,为机组的长周期运行取得了操作经验。     

循环氢压缩机的选型分析

循环氢压缩机已广泛应用于石化行业的加氢精制和催化重整装置中,且为核心设备。合理地选型对于装置的“安、稳、长、满、优”运行尤其重要。文章首先列举了现有的工程设计选型,然后从技术和经济的角度进行了分析与探讨,最后提出了如何进行合理的选型设计。     

塑料包装的循环再生——木塑材料加工技术

讨论用废弃的塑料包装生产木塑材料的必要性，可行性，介绍木塑材料加工工艺技术。     

制冷剂的回收、循环和再生技术在生产中的应用

通过对制冷剂的回收、循环、再生技术的工艺原理、技术特点以及设备配置、设备工作原理等方面的分析，阐述了制冷剂的回收、循环和再生技术在生产中实际应用的可行性。     

Gray-box identification of dynamic models for the bleaching operation in a pulp mill

The development and application of gray-box identification techniques for modelling the bleaching operation in a Bleached Chemi-Thermo Mechanical Pulp (BCTMP) mill are explained. The process is characterized as a delay dominant recycle process with significant input nonlinearities. The identification was carried out using routine operating data in which the outputs were measured irregularly. The effects of these characteristics and consequent modifications of the system identification techniques are discussed. The resulting models are being used for online prediction and model-based controller design at the mill with satisfactory performance.