共查询到20条相似文献,搜索用时 187 毫秒
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机车废润滑油再生新工艺的研究 总被引:1,自引:0,他引:1
本研究提出了一条废油再生的新工艺。采用乙醇胺做凝聚剂,配合离心分离和减压蒸馏技术处理废润滑油,即凝聚脱沥青-离心油渣分离-蒸馏脱水,轻油-白土吸附。其特点是减少了废气,废渣环境污染,提高了油的回收效率。 相似文献
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废二氯甲烷回收工艺的研究 总被引:1,自引:0,他引:1
文章为使废二氯甲烷回收再利用,研究了直接精馏和洗料精馏两种回收工艺,确定采用洗料-精馏回收方法可以使废二氯甲烷的收率达95%以上,且回收后的二氯甲烷的各项指标均达到再利用的标准. 相似文献
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大量工业废催化剂的丢弃,不仅是一种资源的浪费,而且对环境也会造成一定程度的污染,针对工业废催化剂的回收利用进行了探讨,着重介绍了几种工业废催化剂的综合回收技术。 相似文献
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本文就化工系统需要解决的氯化氢的回收及废盐酸的净化这一普遍问题,提出了回收所采用较实用的四种装置及其优、缺点的比较;对净化则提出了三种方法及其适用对策和范围.同时在解决氯化氢尾气的处理与回收中,又指出了具体的工艺路线;在几种方法应用时,对如何筛选也指出了切合实际的建议. 相似文献
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针对我国包装废物产生、回收、最终处置的各阶段现状进行调查和分析,主要对于我国现阶段塑料、纸制品和金属制品的包装产生消费量进行综合分析,并实地对居民生活小区零散个体回收者的包装废物回收量和包装废物再生企业包装废物原料回收渠道以及最终流入生活垃圾填埋场的包装废物含量进行了调研. 将包装废物产生量、回收量与最终处置量相比较的结果可以看出,现有回收体系对于部分包装废物回收效果较好,例如包装废物中PET聚酯瓶和金属罐的回收效果最好;而没有经济利益的塑料袋几乎完全没有得到回收再生,是回收工作的难点. 再进一步通过对复合包装再生企业和PET聚酯瓶再生企业的回收体系的实例分析,提出我国现存包装废物回收体系中存在的问题. 相似文献
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电子废弃物是目前世界上增长最快的固体废弃物之一,其不合理处置会造成人体健康危害和环境污染,作为一种潜在可回收利用的二次资源,正日益引起人们的高度关注。概述了当前世界上一些发达国家电子废弃物回收利用体系现状,分析了我国目前的相关情况,提出了建设电子废弃物综合回收利用体系对于构建循环经济和和谐社会的必要性与重要性。 相似文献
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对我国废旧硒鼓墨盒的回收处理现状、主要资源化方式和技术,以及生产者责任延伸制度的实施进行了论述。结果显示:我国废旧硒鼓墨盒回收处理市场管理混乱,大部分废旧硒鼓墨盒由小商贩回收进入了非法的再利用渠道;我国部分企业和研究机构对于废旧硒鼓墨盒的翻新利用以及资源循环利用进行了研究,为未来废旧硒鼓墨盒的大量处置提供了技术基础;部分企业已经在我国进行了废旧硒鼓墨盒的回收循环尝试,但是效果不是很好。生产者责任延伸制度是我国废旧硒鼓墨盒管理的必由之路。未来,我国废旧硒鼓墨盒的处理处置仍面临着巨大的挑战。 相似文献
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Vivian W.Y. Tam 《Journal of Cleaner Production》2009,17(7):688-702
Environmental problems have been considered to be serious in the construction industry. Waste management pressures are pressing very hard with alarming industrial warming signals. Among the different types of construction and demolition wastes, concrete is about 81 percent of the volume of construction and demolition waste in Australia. To minimize the concrete waste generated from construction activities, recycling of concrete waste is one of the best methods to improve the environment. However, situations of concrete recycling in different countries vary considerably. Japan is a leading country in recycling concrete waste, with 100 percent recycling of the wastes that are used for new structural applications. This paper investigates the current concrete recycling situations in Australian and Japanese construction industries. A questionnaire survey and structured interviews were conducted. In comparing the current concrete recycling situations between Australia and Japan, it should be noted that major difficulties found from Australian and Japanese construction industries are on different phases of the transition to recycling of construction wastes. Therefore, it is suggested that the Australian construction industry should be: i) developing a unified policy in concrete recycling; ii) providing financial governmental support; iii) developing clear technical specifications or standards on the use of recycled aggregate for structural applications. 相似文献
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This paper is to investigate the behavior of residents towards electrical and electronic waste (e-waste) recycling in Beijing. For this purpose a large sample questionnaire survey was performed to explore the residents’ characteristics of recycling behavior and preference of e-waste recycling pattern. Besides, the willingness of residents to participate in e-waste recycling was also assessed in our study. For this a logistic regression model was developed to estimate and explain residents’ willingness in e-waste recycling. The model showed that Convenience of recycling facilities and service, Residential conditions, Recycling habit and Economic benefits are four determinants of Beijing residents’ willingness and behavior in e-waste recycling. And centralized recycling pattern by professional recovery spots would have a broad prospect if various kinds of channels can be provided to make the residents feel more convenient in e-waste recycling. 相似文献