利用重质稠油生产沥青的VOCs排放特征

沥青生产是重要的石化行业子行业之一,目前尚缺乏针对该行业VOCs排放的相关研究.为探明沥青生产行业VOCs的排放特征,选取以重质稠油为原料生产沥青的某典型企业,主要采集有组织和无组织排放工序环节的样品,通过GC-MS定量检测了 65种VOCs.结果表明,该企业沥青生产的VOCs排放浓度为37.28～7528.00 μg...     

圆柱直齿轮温挤压精密成形工艺研究

采用温挤压精密成形技术,成功地研制出直齿圆柱齿轮零件,理论和实验证明,新工艺具有优质高效节材节能的特点,非常适合圆柱直齿轮,特别是大模数齿轮的精密成形。     

30CrMnSiNi2A钢壳体毛坯的温挤压成形工艺研究

针对30CrMnSiNi2A超高强度钢制壳体毛坯的结构特点和材料工艺特性,对该壳体毛坯的温挤压成形工艺进行了大量的试验研究;并采用"正交试验方法"对温挤压工艺参数进行了优化设计。经过理化检测和使用结果表明,采用温挤压工艺生产的30CrMnSiNi2A钢制壳体毛坯锻件完全满足壳体的使用要求,各项性能指标合格。     

Are the Curative Properties of ‘Black Mud’ from the Dead Sea Due to the Presence of Bitumen (Asphalt) or Other Types of Organic Matter?

Deep black clayey sediments of the Dead Sea, previously covered with water at times of higher sea level, are being mined for therapeutic purposes and for the preparation of cosmetic products under the name Black Mud. It was claimed that the beneficial properties are due to the presence of bitumen (asphalt) as attested by the colour. Less commonly, the curative properties have been ascribed to humic acids or to organic matter derived from algae in the lake. Asphalt from the Dead Sea has been of major economic importance to the region and was used as a medication for 2000 years until the mid-20th century. Geochemical analysis of the Black Mud showed that it contains relatively little organic matter (ca. 0.6–0.8% organic carbon) and that the organic matter is mostly derived from the land masses surrounding the lake. Asphalt was totally absent and the concentration of humic acids very low. The black colour of the mud is rather due to the poorly crystallised iron sulphides. Based on this, the therapeutic properties of the mud are ascribed to its content of reduced sulphur species, its physical and chemical properties and possibly its brine content, but not to the presence of organic matter.     

云南铝厂阳极焙烧沥青烟气的干法净化

根据云南铝厂焙烧车间阳极焙烧的工艺状况以及产生的沥青烟的成分和特点 ,借鉴了国内外治理沥青烟的经验 ,采用干式电捕法 ,并且回收的沥青可返回生产系统。介绍了净化系统的工作原理、工艺流程和特点 ;阐述了净化系统的灭火防爆、全电离、带电喷淋清洗、沥青软化点控制、系统的自控联锁 5个主要特点。     

湖沥青加SBS改性沥青混合料路用性能试验研究

本文通过室内试验,对首都机场高速公路大修中上面层采用的湖沥青加5%SBS改性沥青混合料路用性能进行了研究,结果表明:与5%SBS改性沥青相比,加入20%湖沥青后的改性沥青混合料的低温稳定性、高温稳定性、疲劳性能、水稳定性等路用性能都有不同程度的提高,是一种值得推广的沥青路面上面层材料。     

From policy mix to policy networks: assessing climate and land use policy interactions in Mato Grosso,Brazil

ABSTRACT

In the climate and land use fields, policy mixes are complex in terms of the levels of governance, actors, and roles. They consist of policy instruments that target different actors and address multiple goals across several policy sectors and levels. The analysis of these complex arrangements extends beyond purely technical efficiency criteria, as several sources of tension between instruments may be identified, such as conflicting interests, goals, and approaches to implementation. The proliferation of governance networks complicates the understanding of actors’ interactions, the types of authority influencing the outcomes of policy mixes, and importance of different levels of governance. This article provides a framework to address these analytical challenges, particularly the interconnected networks of policy actors and policy instruments. It draws on polycentric governance literature to analyse how power matters in policy networks. This includes identifying distinct types of power, actors’ position, and variables that explain patterns of conflict, competition, convergence, and divergence in policy choices and outcomes. The framework is applied to the climate and land use policies implemented in the state of Mato Grosso, Brazil. Several methods were used to clarify these variables and to characterise policy mixes being implemented in the region, including social network analysis.     

用电捕焦油法净化炭素焙烧炉烟气

论述了静电捕焦油器净化炭素厂焙烧炉烟气的工艺流程及技术参数 ,提出了确保系统正常运行的技术措施。使用静电捕焦油器后沥青烟排放浓度低于 5 0mg/m3 ,粉尘排放浓度降到 2 6mg/m3 。     

浅谈预焙阳极生产过程中的废气污染及防治措施

介绍了预焙阳极生产过程中废气产生的主要工段——原料破碎、石油焦煅烧、煅后料冷却、配料、混捏成型、阳极焙烧，主要废气污染物为粉尘、煅烧废气、沥青烟气。结合国内外现有的烟气治理措施，详细评述了现有的废气的治理技术及存在的问题。同时，针对沥青烟气产生的不同工段，提出采用不同净化处理措施。     

OGFC面层在公路隧道防火中的作用

研究了OGFC路面在隧道防火中的应用,并分析了其防火效果.OGFC沥青混合料孔隙率高达15%～25%,可以把泄漏在OGFC路面层的液体燃料迅速排入道路两侧边沟.本文对比分析了OGFC/SMA/AK三种沥青混合料的排油速率和饱油孔隙率.通过室内马歇尔试件的汽油燃烧试验和隧道内燃料泄漏模型的计算分析,发现OGFC面层的排油防火效果非常好.