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131.
A debate is still open on issues of waste to energy methodologies aiming to answer to questions of particular relevance, such as whether the concept of SRF/RDF production can be applied directly to MSW through the Mechanical–Biological Treatment (MBT) process, when selective collection acts as a virtual pre-treatment of the same, or if the use of SRF/RDF as alternative fuel in cement kilns is the most sustainable solution. In this study, two scenarios were analyzed and compared: (a) the use of SRF in a new dedicated thermal plant for electricity production and (b) the use of SRF as an alternative fuel in an existing cement plant. The comparative assessment was based on principles of Sustainable Waste Management embracing technical and cost issues, environmental protection, industrial ecology and symbiosis. The application of SWOT analysis showed that the use of SRF in cement kilns is more sustainable compared to its use in a new dedicated plant for electricity production. 相似文献
132.
通过分析已实施的工程运行情况,总结了玻璃窑烟气采用湿法净化系统存在的一些问题:一是高温腐蚀非常严重,二是结垢堵塞严重,再就是水处理系统的冷热水分层问题。供类似工程的方案设计参考。 相似文献
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Rustinsyah 《国际发展与全球生态学杂志》2016,23(6):493-503
The studies about patterns and impacts of a company’s corporate social responsibility (CSR) programmes on the local communities have been conducted in a number of developed countries. The similar studies, however, were still rarely conducted in developing countries, particularly in Indonesia. This study aims at discussing the impact of the CSR programmes of a cement company on the lifestyles of a rural community in six villages in Tuban district of East Java Province in Indonesia. The study was conducted from January to September 2015, using qualitative data collection and analysis. This study found that the presence of the cement company has made both positive and negative impacts to the rural community. For the positive impacts, we can see the development of infrastructure that makes the villages become more representative; the emergence of new business opportunities, such as food stalls and boarding houses; and the improvement of the quality of human resources through free health care, education, and religious activities. The supports from the cement company, however, have not been distributed equally among the villagers. In addition, we can also see the following negative impacts: the increase of social tense among the villagers due to the tight competition to obtain work in the cement company; the uneasy relation between the local people and the immigrants who work in the cement company; the decrease in the number of people working in agricultural sectors, as most of them have moved or wish to move to the cement company. 相似文献
135.
水泥窑共处置含Cr废物中Cr在不同温度下的形态转化 总被引:1,自引:0,他引:1
将Na2CrO4加入生料中模拟含Cr入窑物料〔掺加比例为0.048%(以w计)〕,以探索水泥窑共处置含Cr废物过程中Cr的形态转化. 将含Cr入窑物料在不同温度条件下进行煅烧,消解煅烧样品以分析Cr在不同温度下的残留率并利用XANES(X射线吸收近边结构光谱)技术分析煅烧样品中Cr的存在形态. 结果表明:对应900、1000、1100、1200、1300和1450℃煅烧条件下,熟料中Cr的残留率分别为88.2%、70.7%、73.7%、67.2%、69.5%和67.8%. 由于窑尾温度为1050~1100℃,并且Cr的残留率在1100℃较高,因此从窑尾添加含Cr废物可以减少水泥窑共处置含Cr废物过程中的Cr逸放. 在900~1450℃煅烧条件下,所有样品中的Cr主要以CrO3、Cr2O3和CaCrO4的形式存在. 1000℃煅烧温度下存在K2Cr2O7,但不存在K2CrO4;900℃和1100~1300℃煅烧温度下有K2CrO4存在,但不存在K2Cr2O7. 1100~1450℃煅烧温度下,Cr元素进入到水泥熟料的主要矿物中,并主要以CrO3和Cr2O3的形式与其他物质结合生成了较为复杂的Ca4A16O12CrO4、Ca6Al4Cr2O15等. 相似文献
136.
分析马钢二烧石灰窑上料系统的噪音源及产生原因,介绍了治理措施,提出一种工业噪音问题的简便治理方法。 相似文献
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138.
The use of recycled waste glasses in Portland cement and concrete has attracted a lot of interest worldwide due to the increased disposal costs and environmental concerns. Being amorphous and containing relatively large quantities of silicon and calcium, glass is, in theory, pozzolanic or even cementitious in nature when it is finely ground. Thus, it can be used as a cement replacement in Portland cement concrete. The use of crushed glasses as aggregates for Portland cement concrete does have some negative effect on properties of the concrete; however, practicle applicability can still be produced even using 100% crushed glass as aggregates. The main concerns for the use of crushed glasses as aggregates for Portland cement concrete is the expansion and cracking caused by the glass aggregates. This paper summarizes the progresses and points out the directions for the proper uses of waste glasses in Portland cement and concrete. 相似文献
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140.