共查询到20条相似文献,搜索用时 62 毫秒
1.
通过对固定污染源烟气在线监测设备比对监测偏差造成不合格的几个典型问题的剖析,从固定污染源烟气在线监测设备数据有效性的判定开始,就污染源在线监测设备问题、人工比对监测方法不同及工艺上不同工况造成比对监测偏差不合格的原因进行分析,提出减少和避免类似问题发生的措施,使固定污染源烟气在线监测设备比对监测合格,能更好地服务于生产。 相似文献
2.
《资源开发与市场》2016,(6)
为了满足水下传感器节点远距离声通信的需求,解决节点发射功率自适应调节和信号在功率放大过程中频谱再生的问题,设计了一种适用于水声通信的程控线性功率放大设备,包括微控处理器和依次连接的一级控制模块、电压放大模块、二级控制模块、功率放大模块和阻抗匹配模块。通过数字开关与电阻组成数字电阻以分压方式对电压放大和功率放大模块的输入信号进行控制,进而控制输出功率;采用线性功率放大器集成芯片进行功率放大,保证信号的无失真传输;通过阻抗匹配变压器,驱动水声换能器工作,以获得最佳的输出功率。实验结果表明,本功放对16-18k Hz频段0—1VPP的交流信号可以进行无失真放大,并且输出功率、程控功能等均能满足系统设计要求。 相似文献
3.
4.
5.
通过对荷贝克、理研汽车两个项目点已建污染源在线监测系统运行状况的调研,并结合重金属废水在线监测系统建设标准和项目点实际情况,介绍了重金属废水在线监控及控制系统的现场端和上端平台。该系统在原有基础上增加了四方面的设计:采用污染因子数据、污水处理工况和在线监测设备系统运行状态相结合的三级监控方式,对上传的数据进行有效性判别;对未达标排放的污水进行监控和控制;对设备故障和超标废水进行报警;自动上传日志及报告。实现了对监测因子数据有效性识别和超标控制功能,提高了在线运营监控工作效率,实际运行效果良好。 相似文献
6.
7.
8.
汞的不当使用和不当排放造成了环境严重污染并危及人类健康及生态环境安全,已经成为全球性的重大问题之一。我国汞污染排放的问题也不容乐观。环保部针对焚烧烟气汞在线监测设备制定了相应的技术要求草案,为污染源汞在线监测设备提供了相应的技术要求,各类在线监测技术将广泛应用。本文介绍了目前焚烧烟气中汞的监测方法,并进行了讨论和提出了建议。 相似文献
9.
脱硝在线连续监测系统与脱硫在线监测系统相比,脱硝装置在电除尘(或袋除尘)装置之前,而脱硫装置在除尘装置之后。由于安装位置的前移,脱硝CEMS系统运行环境将比脱硫CEMS系统更为恶劣,脱硝装置将面临着高温、高粉尘、高负压等一系列问题。本文结合脱硝装置工况及有关环保标准,提出了脱硝CEMS系统对设备的要求以及设备维护中的问题。 相似文献
10.
针对现有噪声监测系统的理论研究较多,没有成熟产品的问题,本文设计了基于LabVIEW软件的环境噪声自动监测系统。利用电声性能较好的驻极体噪声传感器对噪声信号进行采集,LabVIEW软件将噪声数据采集到上位机,并对原始信号进行分析、处理,再通过无线传输模块将分析好的噪声值发送到噪声监测终端,实现了噪声的自动管理及监测。本系统具有测量精度高、稳定性好、环境适应性强等特点。 相似文献
11.
12.
城镇化是推动我国经济社会发展的重要动力,在高速发展的同时,带来大量污染排放,威胁乡村环境质量与可持续发展。在对乡村生态环境问题剖析的基础上,从战略、实施、方式等层面探索解决思路,围绕科学规划、发展方式、基础建设、管理机制、宣传教育等方面分析关键点,加强乡村环境保护,保障城镇化建设健康发展,为促进农村农业持续发展提供持久动力。 相似文献
13.
Trametes versicolor decolorized 2000 mg L(-1) of the mono-azo substituted naphthalenic dye Amaranth with no dye sorption observed visually. The changes in the toxicity were assessed over a period of 30 d for the dye-treated viable culture, control (no dye added), and a boiled culture treated with dye, using the Microtox Acute Toxicity assay. Before dye addition, the culture filtrate had some toxicity, which increased after the dye addition. The toxicity of the dye-treated culture decreased during the treatment. The loss of toxicity occurred at the same time, with the loss of color suggesting that detoxification is associated with decoloration. The change in pH was due to natural metabolic processes and had a small effect on detoxification. Because the toxicity of the treatment was similar to that of the control at the end of the treatment, the effluent seems to be safe for release into the environment, potentially rendering this treatment suitable for industrial application. 相似文献
14.
泵站树状给水管网流量具有随机性,而这种随机性变化会直接影响管网的建设费用和动力费用.针对这-特点,应用随机规划原理,建立泵站树状给水管网机会约束模型,编写基于随机模拟的遗传算法程序求解该模型.机会约束模型能较客观地反映该管网的实际工况,使优化设计结果更符合实际. 相似文献
15.
16.
17.
Günay Kocasoy 《Environmental management》1989,13(4):469-475
The increase in the number of tourists visiting a coast is desired by most of the countries for economic reasons. However, this increase in tourism may cause pollution of the sea. This can be only avoided by proper planning and by predicting the carrying capacity of the coast in terms of sea pollution. This is especially important for developing countries where part of the wastewater is discharged without any treatment into the sea.In the present study the beaches were classified according to their use — and consequently the amount of waste discharged into the sea — into four groups: (1) coasts that are used only for swimming and recreational purposes; (2) coasts used simultaneously for dwelling, swimming, and recreational purposes; (3) coasts along which only dwellings exist; and (4) natural and man-made harbors, i.e., coasts used as shelters. During the survey,40,320 observations were made between December 1985 and February 1988 to determine the effect of the number of tourists on seawater quality. The results obtained were analyzed by a multilinear regression program to obtain an empirical equation giving the extent of the sea pollution in terms of coliform concentration as a function of population density and some other environmental factors.The equations derived in this study enable the determination of the carrying capacity of a beach in terms of pollution as well as the expected degree of pollution corresponding to a given population density. Furthermore, it allows the prediction of the extra carrying capacity that can be obtained by improving the waste-disposal conditions. 相似文献
18.
阐释了信息产业专门化街区的内涵,结合对合肥市黄山路信息产业专门化街区构成要素的分类及其邻近度的分析,分别从空间结构演化、景观演化、功能演化三方面阐述了合肥市黄山路由"电子一条街"向"信息产业专门化街区"的总体演化阶段,探讨了信息产业专门化街区的未来发展趋势。 相似文献
19.