炉排炉垃圾焚烧控制策略

结合天津泰环再生资源利用有限公司贯庄垃圾焚烧发电项目中希格斯机械炉排炉的应用,介绍了炉排炉焚烧线工艺流程,并重点分析了炉排炉焚烧线中一次风、二次风、给料及炉排速度等系统的控制策略。     

浮式与固定式溢油应急设备库的匹配作业及工艺方案分析

依据溢油应急浮式设备库的职责和功能要求,分析了浮式设备库与固定式设备库的匹配作业和浮式设备库三种作业工艺方案。结果表明:固定式设备库与浮式设备库是互相匹配和补充的整体,针对不同规模的溢油事故,浮式设备库宜采取的作业工艺方案也不同。     

溢油应急浮式设备库设计方案

依据溢油应急浮式设备库配置设备的类型及数量,提出了设备库的设计方案;设备库将以趸船为基础,设计了底舱、设备库房、会议室、办公室、休息室和溢油处置辅助设备,设备库房和底舱配置了动力驱动系统、布放设备、溢油卸载、围控、回收、储存、油水分离及移驳过驳等设备,实现了设备库的平台承载、溢油应急处置和辅助三大功能。     

Effects of photovoltaic panels on soil temperature and moisture in desert areas

Environmental Science and Pollution Research - Photovoltaic power generation is an important clean energy alternative to fossil fuels. To reduce CO2 emissions, the Chinese government has ordered...     

Surfactant-assisted adsorption of uranyl ions in aqueous solution on TiO2/polythiophene nanocomposite

In this work, hexadecyltrimethylammonium-bromide (HTAB)-modified polythiophene (PTh)/TiO₂ nanocomposite (HTAB/PTh/TiO₂) was applied to remove uranyl ions (UO₂²⁺). FT-IR, XRD, ζ potential, TGA, SEM, and XPS were utilized to obtain the chemical and physical properties of HTAB/PTh/TiO₂. The effects of HTAB content, preparation temperature, and adsorption conditions on UO₂²⁺ removal were investigated comprehensively. And the UO₂²⁺ adsorption process on HTAB/PTh/TiO₂ was fitted to the Sips model with a saturated adsorption capacity of 234.74 mg/g, which was 6 times over TiO₂. The results suggested that the surfactant of HTAB can significantly improve the adsorption ability of TiO₂ for UO₂²⁺ ions. This work provides a strategy of surfactant modification for enhancing the separation and recovery ability of adsorbent toward UO₂²⁺ in the radioactive wastewater.

     

荒漠化治理时不我待——访美国国家大气研究中心格兰茨博士

对于国人来说，沙尘暴一词应该说是非常熟悉、家喻户晓的术语。特别是今年春天北京城里的“满城金甲”更是让沙尘暴成了“罪大恶极”的“污染”元凶。沙尘暴不光是中国的“敌人”。更是全球荒漠化恶化的“副产品”。因此。在纪念国际荒漠年和《联合国防治荒漠化公约》生效10周年，以及联合国防治荒漠化和干旱世界日之际，我刊记者对远在太平洋彼岸的大气科学家，美国国家大气研究中心能力建设中心主任格兰茨（Glantz）先生进行了越洋电话采访。[编者按]     

香格里拉区域大气本底站地面臭氧浓度的变化特征

对2009年香格里拉区域大气本底站地面臭氧观测结果进行分析,研究其浓度水平、变化特征、影响因素及其区域代表性。结果表明:香格里拉站地面O₃月均值浓度在21.8~57.7 ppb,年平均值为38.0±12.1 ppb,在春季最高,平均值为54.1 ppb,在夏季最低,平均值为28.0 ppb。O₃小时均值浓度超过60 ppb的小时数占总有效小时数的6.6%,超过40 ppb的小时数占43.0%。与相近纬度中国东部地区区域大气本底站地面臭氧观测结果相比,香格里拉站体现出不同的O₃日变化和季节变化特征,具有特殊的地域特征。影响香格里拉站的气流主要来自于其西南方向,3 d的后向轨迹可追溯到孟加拉湾东北部地区。偏南的气流主要出现在夏秋季节,O₃浓度相对低,偏北的气流以冬春为主,O₃浓度相对高。     

Using discriminant analysis to assess polycyclic aromatic hydrocarbons contamination in Yongding New River

Yongding New River has been polluted by polycyclic aromatic hydrocarbons (PAHs) which are carcinogenic and mutagenic. In three periods (the abundant water period, mean water period, dry water period), ten sites (totally 30 samples) in Yongding New River were clustered into four categories by hierarchical cluster analysis (hierarchical CA). In the same cluster, the samples had the same approximate contamination situation. In order to eliminate the dimensional differences, the data in each sample, containing 16 kinds of PAHs, were standardized with normal standardization and maximum difference standardization. According to the results of the cubic clustering criterion, pseudo F, and pseudo t ² (PST2), the proper number of clustering for the 30 samples is 4. Before conducting hierarchical CA and K-means cluster analysis on the samples, we used principal component analysis to obtain another group data set. This data set was composed of the principal component scores which are uncorrelated variables. Hierarchical CA and K-means cluster analysis were used to classify the two data sets into four categories. With the classification results of hierarchical CA and K-means cluster analysis, discriminant analysis is applied to determine which method was better for normalization of the original data and which one was proper to cluster the samples and establish discriminant functions so that a new sample can be grouped into the right categories.