湖北省水泥工业大气污染物排放水平分析及排放标准制定建议

面对水泥工业超低排放改造的趋势,本文调研了湖北省2020年度部分水泥生产线污染物排放数据,结合企业污染治理技术,分析了湖北省水泥工业大气污染物排放水平,并对湖北省水泥工业地方排放标准制定进行了分析和建议。     

山西省水泥工业大气污染物排放水平分析及超低排放改造技术研究

面对水泥行业超低排放改造的趋势,本文调研了山西省部分水泥企业污染物排放数据和超低排放改造完成企业,分析了山西省水泥行业大气污染物排放水平。重点介绍了几种现行的NO_X、SO₂超低排放控制技术,分析了其优缺点。     

山西省水泥工业大气污染物超低排放标准限值研究

水泥工业大气污染物排放要求持续收严,各地相继提出各类超低排放标准,山西省也提出水泥工业大气污染物超低排放方案。本文介绍山西省水泥企业超低排放改造的必要性以及超低排放改造进展情况,分析山西省水泥工业大气污染物超低排放改造方案中有组织颗粒物、二氧化硫、氮氧化物、氨、氟化物、汞及其化合物等污染物排放限值,及无组织颗粒物、氨污染物排放限值确定的依据,与广大生态环保工作者分享经验。     

更严格的水泥工业大气污染物排放控制标准将于2010年1月1日起开始实施

从2010年1月1日起，我国更严格的水泥工业大气污染物排放控制标准将开始实施。 目前我国水泥工业实行的环保标准《水泥工业大气污染物排放标准》（GB4915—2004）是国家环境保护总局国家质量监督检验检疫总局2004年12月29日发布的，该标准对水泥生产线各生产设备（设施）排气筒中的颗粒物和气态污染物最高允许排放浓度及单位产品排放量的要求在不同时间段是不同的。     

我国水泥工业当前不宜执行火电行业"超低排放"的限值

对水泥行业与火电行业年耗煤量、大气污染物排放量及其对城市环境的影响、大气污染物排放标准和所谓"超低排放"要求浓度限值等进行对比分析,可以看出两个行业存在很大的不同;对德国水泥工业NOx排放标准的发展和制订进行介绍,再结合中国水泥协会孔祥忠执行会长针对"超低排放"问题的有关论述,尤其是我国环保标准制定的四项基本原则,可以...     

谈《水泥厂大气污染物排放标准》的修订

本文介绍了原《水泥工业大气污染排放标准》的制定过程和存在的问题,及修订中的新标准的特点。新标准的修订将对我国水泥工业结构调整、环境质量的提高产生积极作用,将会有力地推动我国水泥工业的可持续发展。同时,也给广大立窑企业;执行二、三类地区标准的企业;1985年以前投产的企业一个强力信息,2005年之前大气污染物排放要达到新标准。     

水泥工业大气污染物排放新标准促行业转型升级

<正>2013年12月27日环保部会同国家质检总局发布《水泥工业大气污染物排放标准》(GB 4915-2013)、《水泥窑协同处置固体废物污染控制标准》(GB 30485-2013)及其配套的《水泥窑协同处置固体废物环境保护技术规范》(HJ 662-2013)等3项标准;《铅、锌工业污染物排放标准》等6项有色金属行业排放标准修改单,增设了大气污染物特别排放限值。综合考虑现有企业脱硝和除尘设施改造     

广东将出台新的水泥工业粉尘污染排放标准

目前广东省工业粉尘排放量中水泥工业粉尘约占70%左右，为进一步治理粉尘污染，广东省将出台新的地方水泥工业大气污染物排放标准，以改善该省水泥工业严重污染环境的局面。     

水泥工业大气污染物排放标准与除尘技术

在上世纪七十年代我国已把环境保护问题列入议事日程。大、中型水泥厂环保工作初步开展。当时，水泥工业的设计，生产主要执行《工业企业设计卫生标准》(GBJ1—62)。为贯彻执行《中华人民共和国环境保护法》(试行)．防止水泥企业排放的污染物对环境的污染．1985年1月18日由城乡建设环境保护部提出，合肥水泥研究设计院起草的针对水泥工业环境保护的国家标准《水泥工业污染物排放标准》(GB4915—85)于1986年实施，     

皂素工业污染排放出台新标准

皂素工业生产废水排放标准将告别无法可依的时代，日前，《皂素工业污染物排放标准》通过国家环保总局的审议。该标准的制定填补了世界皂素行业排放标准的空白。     

Thermionic emission of amorphous diamond and field emission of carbon nanotubes

Thermal-field emission characteristics from nano-tips of amorphous diamond and carbon nanotubes at various temperatures are reported in this study. Amorphous diamond emitted more than 13 times more electrons at a temperature of 300 °C than at room temperature. In contrast, CNTs exhibited no increase of emitted current upon heating to 300 °C. The thermally agitated emission of amorphous diamond is attributed to the presence of defect bands. The formation of these defect bands raises the Fermi level into the upper part of the band gap, and thus reduces the energy barrier that the electrons must tunnel through. From defect bands within the band gap, the conduction band electrons were significantly increased due to electron tunnels from defect bands. The enhanced thermal-field emission originating from defect bands was observed in this study. This thermally agitated behavior of field emission for amorphous diamond was highly reproducible as observed in this research.     

基于排放绩效的浙江省水泥企业超低排放评估研究

根据排放绩效理论,结合浙江省水泥企业主要生产工段的污染物排放量,计算单位合格产品的排放绩效值,并依此对超低排放效果进行评估,为探索适合浙江省水泥行业的排放绩效标准提供实践依据。     

烧碱行业碳排放现状分析及企业碳排放管理

在绿色经济发展要求下,根据烧碱行业的生产现状分析和生产要求,在不同的节能情景下完成产量预测、技术普及和节能潜力分析,制定节能目标,向减排后目标能耗要求的方向努力,优化产能结构。     

Luminescence emission of isotactic polypropylene

In order to elucidate the origin of luminescent species in unstabilized commercial isotactic polypropylene (IPP), effects of hexane extraction and exposure of the extracted IPP film to the atmosphere on both fluorescence and phosphorescence emissions were examined. Fluorescence emission from the unextracted IPP film disappeared by the extraction, and only a very weak phosphorescence emission was found. During the exposure of the extracted IPP film to the atmosphere, both fluorescence and phosphorescence emissions appeared again. The intensity of the spectra increased with the exposure time and finally almost reached that from the unextracted IPP film. The results indicated that main fluorescent species in IPP are foreign impurities originating from an ambient atmosphere, and that contribution of a very minor amount of phosphorescence species such as carbonyl groups incorporated with the polymer was scarce.     

二氧化硫排放法规

自20世纪70年代二氧化硫被确定为严重的环境污染物以来,世界各国就开始逐步立法,以减少二氧化硫的排放。介绍了欧洲、美国、加拿大、中国、印度等二氧化硫排放法规的立法历程及现状,重点讨论了各国燃煤电厂的二氧化硫排放限值。     

中国氯碱行业碳排放现状及碳减排实施路径

2020年9月,习近平总书记在第七十五届联合国大会上明确提出,中国二氧化碳排放力争于2030年前达到峰值,努力争取2060年前实现碳中和.目标的提出,既是中国履行大国责任、推动构建人类命运共同体的重大历史担当,也是中国进一步加快形成绿色发展方式和生活方式,大力建设生态文明和美丽中国的新征程的重要标志和最新举措.目前,国...     

Diesel particulate emission control

This paper reviews the emission control of particulates from diesel exhaust gases. The efficiency and exhaust emissions of diesel engines will be compared with those of otto engines (petrol engines). The formation of particulates (or “soot”), one of the main nuisances of diesel exhaust gases, will be briefly outlined. The effects of various emission components on human health and the environment will be described, and subsequently the emission standards for particulates and for NO_x, which have been introduced worldwide, will be summarized. Possible measures for reducing exhaust emissions of particulates and NO_x will be discussed, such as the use of alternative fuels, modifications to the engine and the use of aftertreatment devices. It will be made clear that aftertreatment devices may become necessary as diesel emission standards become more stringent, in spite of important progress in the other fields of reducing exhaust emissions. Selective catalytic reduction via hydrocarbons, ammonia or urea, a possible aftertreatment method for NO_x emission control, will be discussed briefly. Filters for collecting particulates from diesel exhaust gases will be examined in more detail and aftertreatment control systems for particulate removal will be reviewed. These can be divided into (i) non-catalytic filter based systems which use burners and electric heaters to burn the soot once it has been collected on the filter; (ii) catalytic filter-based systems which consist of filters with a catalyst coating, or filters used in combination with catalytically active precursor compounds added to the diesel fuel; and (iii) catalytic non-filter-based systems in which gaseous hydrocarbons, carbon monoxide and part of the hydrocarbon fraction of the particulates are oxidized in the exhaust gases. Finally, recent trends in diesel particulate emission control will be discussed, indicating the growing importance of the catalytic solutions: the fast introduction of non-filter-based catalysts for diesel engines and the possible application of filters in combination with catalytically active precursor compounds added to diesel fuel.     

岩石声发射特性的研究

对单轴压缩下的花岗岩、砂岩、灰岩的声发射及剪切时花岗岩、灰岩的声发射进行了测试．并对声发射的时间序列、活动特点和频谱特征等进行了分析．结果表明，岩石的声发射时间序列可分为主震型、孤震型和震群型三类，与岩石结构的均匀性和受力状态有关．岩石声发射活动在岩石破坏前都有一个稳定发展阶段和加速发展阶段。声发射的主频在５～３０ｋＨｚ以内，与岩石种类和受力状态关系不大。声发射主频—幅值因岩石不同而呈不同的分布状态。     

Nitrous oxide emission from temperate meadow grassland and emission estimation for temperate grassland of China

Nitrous oxide emission from temperate meadow grassland was measured using a closed chamber method at two experimental sites in China. In the four-month measurement period, the N₂O fluxes in mown meadow grasslands of the Songnen Plain and of the Kerqin Steppe were on average 41.1 and 7.9 g N₂O-N m^–2 h^–1, respectively. Considering the influence of grassland type and degradation extent, an empirical formula was constructed, with which the annual N₂O emission from temperate grassland of China was estimated as 40.4 Gg N. Meadow grassland, accounting for 14.0% of the total grassland area, contributed 28.4% of the total N₂O emission.