微真空消声器的应用

成都钢铁厂家属区职工食堂一台0.5t/h的立式弯水锅炉,距离职工宿舍仅5m。该锅炉昼夜定时排污,产生的噪声对职工造成极大的危害,群众反映十分强烈。为此,我们根据生活用锅炉定时排污产生的噪声的特点,设计、制做了一台锅炉排污微真空消声器,使用效果很好。经国家专利局审查,锅炉排污微真空消声器于1992年2月被授予实用新型专利权。     

福临祸至

①、罗岭是块风水宝地,外商在这里建了一个渡假村,宁静的环境增加了几分喧嚣。、’,,、L一一,一/r:j/≥0{ ,。:f、 ’,,l、 ‘ ’‘～一,,前呤羹①、罗岭是块风水宝地,外商在这里建丁一个渡假村,宁挣的环境增加了几分喧嚣。⑧、外商梁先生又看中村后一片坡地,想开发成为高尔夫球场。村长未听条②、旅游业带旺了村里的小工艺、小饮食,山村的日子。红红火火。⑤、村民受特别优惠,连稍有劳力的老人也被招去当清洁工、保管员。④、球场土动工,植被被铲光,山坡被推平,山泉被堵死了,唯独几棵老树在唉声叹气。⑦止目状告到村长家,村长说:f_不要大…     

武钢供水厂以班组建设为中心搞好安全生产

我厂共有7个车间,66个水站、变电所,141个班组。各车间、站所分散在武钢方圆几十里,分布面广。根据我厂点多、面广、战线长、作业人员分散、作业危险性大的特点,寻找一条适合我厂班组安全建设的新路子,是我们不断探索的一个课题。几年来,我们坚持围绕以班组安全建设为中心,以安全教育为基础,以安全管理保证体系为手段,以开展安全合格班组达标活动为重点,取得了一定成效,连续14年无工亡事故,近五年无重伤,年千人负伤率在1.3以下,多次被评为湖北省和武汉市安全生产先进单位。     

SZE—2型隔声罩在镇海电厂125MW机组上的使用及存在问题

在一般火力发电厂中，汽轮发电机组的噪声污染是比较突出的问题。国内电厂的噪声测试表明：汽轮发电机组各部位的噪声值大都在90dB（A）以上，个别部位甚至高达100dB（A）以上，对运行工人及周围环境产生严重危害。对于发电机组的噪声治理，一般采用隔声罩，即从传播途径方面来控制。但由于电厂设备复杂，噪声种类多等原因，治理效果不太理想。镇海发电厂总装机容量为1050MW，一期工程主厂房内装有两台125MW的燃油发电机组。其中汽轮机型号为N125－135／550／550；发电机型号为QFS－125－2。两台机组分别于1979年1月和9月投产发电。这…     

三十六瓶酒勾掉四条命——南安市"7·26"特大交通事故引发的深思

一个青春正茂的男子痛失前程命归车祸 一个年轻俏丽的姑娘泪别亲人魂归黄泉 一对妙龄少女姐妹不幸花季凋零灰飞烟灭 三十六瓶酒迸发一个令人惋惜的人间悲剧     

Health and environmental assessment of mercury exposure in a gold mining community in Western Mindanao, Philippines

The small-scale gold mining activities using mercury began in the late 1980s in Sibutad, Western Mindanao. It is located very near the Murcielagos Bay with tailing ponds directly discharging into bodies of water. This cross-sectional study aimed to determine the health and environmental effects of gold mining activities on the community. Residents were randomly selected and classified into two groups, namely, the directly exposed and indirectly exposed populations using a set inclusion criteria. Complete medical and laboratory examinations were performed. Environmental and biologic samples were collected for total mercury and methylmercury determinations. The results showed that the directly exposed group had significantly higher mean blood total mercury and methylmercury levels in comparison with the indirectly exposed population. Although there were no significant differences between hair total mercury and methylmercury levels, there was a trend for higher levels of these biomarkers among the directly exposed residents as compared with the unexposed group. The absence of statistically significant differences may be attributable to the small sample size. Ambient air quality monitoring for mercury exceeded the allowable levels. However, levels of mercury in drinking water and sediments were within allowable limits. Frequency of gastrointestinal complaints was significantly associated with elevated hair methylmercury levels (p=0.02). Also, there appears to be a trend towards higher blood total mercury levels and frequency of gastrointestinal complaints (p=0.09). An interesting finding in this study was the increasing incidence of elevated diastolic blood pressure with elevated hair total mercury levels (p=0.07). Mercury storage at home is a risk factor.     

联合国环境署最近发表一份报告,指出——亚太地区八大环境问题

亚太地区拥有面积1.65亿平方公里的太平洋和面积7300万平方公里的印度洋。拥有33亿人口和世界上三个人口最多的国家:中国、印度和印度尼西亚。这里的土地占全球土地总面积的23％。人口却占总人口的58％。亚太地区的经济原本很落后,但目前已变成全球经济最有生气的地区,经济年增长率多年来一直高过全球其它地区。当然,反差也很     

适温织物的研究

不同的纤维织物经过含有适当交联剂和混合酸催化剂的聚乙二醇溶液浸轧,在一定的焙烘条件下,处理后的织物可获得较高的热焓值15—35J/g,具有适温性能。即在一定温度范围内,升温时吸热凉爽和降温时放热保温。相变物质聚乙二醇(PEG)在热力学转变时,由于热容量较大,所以使织物具有显著适温性能。本实验研究不同条件与织物类型对适温性能的影响。