污水处理厂产泥量与进水水质关系的研究

为研究阜阳污水处理厂近几年来污泥产量与进水水质之间的关系,对自2007年1月份以来的产泥量与进水水质的基础数据进行了整理．并通过建立各个数据之间的相互关系图表来分析产泥量与进水水质之间的关系。     

Fast increasing of surface ozone concentrations in Pearl River Delta characterized by a regional air quality monitoring network during 2006-2011

Based on the observation by a Regional Air Quality Monitoring Network including 16 monitoring stations, temporal and spatial variations of ozone(O3), NO2and total oxidant(Ox) were analyzed by both linear regression and cluster analysis. A fast increase of regional O3concentrations of 0.86 ppbV/yr was found for the annual averaged values from 2006 to 2011 in Guangdong, China. Such fast O3increase is accompanied by a correspondingly fast NOx reduction as indicated by a fast NO2 reduction rate of 0.61 ppbV/yr. Based on a cluster analysis, the monitoring stations were classified into two major categories – rural stations(non-urban) and suburban/urban stations. The O3concentrations at rural stations were relatively conserved while those at suburban/urban stations showed a fast increase rate of 2.0 ppbV/yr accompanied by a NO2 reduction rate of 1.2 ppbV/yr. Moreover, a rapid increase of the averaged O3 concentrations in springtime(13%/yr referred to 2006 level) was observed, which may result from the increase of solar duration, reduction of precipitation in Guangdong and transport from Eastern Central China. Application of smog production algorithm showed that the photochemical O3production is mainly volatile organic compounds(VOC)-controlled. However, the photochemical O3production is sensitive to both NOx and VOC for O3pollution episode. Accordingly, it is expected that a combined NOx and VOC reduction will be helpful for the reduction of the O3 pollution episodes in Pearl River Delta while stringent VOC emission control is in general required for the regional O3 pollution control.     

我国清洁生产审核现状分析

清洁生产是我国工业可持续发展的一项重要战略.但目前有些清洁生产审核机构的清洁生产审核工作还存在着“粗放”现象,不利于清洁生产可持续发展.本文结合清洁生产审核现状,针对清洁生产审核过程中存在的问题,进行了系统分析.作者认为,树立群体意识、加强领导的表率作用,对促进我国清洁生产审核工作持续、稳定、健康发展,推进环境污染防治工作具有重要意义.     

Microstructure of 2205 duplex stainless steel joint in submerged arc welding by post weld heat treatment

The 2205 duplex stainless steel (DSS) is of both good properties austenitic steel and ferritic steel, which applies to the shipbuilding industry usually. In this paper, the OM, XRD and microhardness test methods are used to analyze the variation of submerged arc welded (SAW) joints with and without post weld heat treatment (PWHT). The research results show that the σ phase disappear in the fusion edge zone near heat affect zone (HAZ) and an increase in the welded center zone during the follow-up PWHT, while the amount of γ phase is decreased in the welded center zone with PWHT. A segregation distribution of some second phases is also found in the welded center zone after PWHT. There have two pick values of microhardness arise in the fusion edge zone and the welded center zone separately without PWHT. However, a maximum value of microhardness at the fusion edge zone near HAZ is disappeared and the other is still held at the welded center zone during PWHT. It can be attributed to the changes of second phases, element diffusions and particle segregation during PWHT. A developing mechanism is issued to demonstrate the second phases transferring of the 2205 DSS SAW joints by PWHT.     

Improvement of welding heat source models for TIG-MIG hybrid welding process

Tungsten inert gas-metal inert gas (TIG-MIG) hybrid welding process is an effective way to improve welding productivity and quality due to advantages of the two processes. Mathematical analysis is crucial to fundamentally understand this synergetic welding process. In this study, based on experimental visualization of arc behaviors, some assumptions are proposed to deduce adaptive plane and volumetric heat source models separately for each involved welding method first. The influence of torch angles on distribution of temperature and geometry of weld bead are calculated and compared with experimental results. It shows that this developed algorithm of heat source can be employed to accurately predict welding process whether the electrode gun is slanted backward or forward to the direction of welding. Then TIG-MIG hybrid welding process is simulated and analyzed without considering the attractive or repulsive force of two arcs. The characteristic of TIG-MIG welding process is discussed compared to single MIG. It lays the foundation for the further research on the interaction of the two arcs during TIG-MIG hybrid welding.     

危化品企业安全生产标准化与其他管理体系的对比研究

分析了安全生产标准化与其他管理体系的关系,并结合当前推进安全生产标准化工作的具体要求,阐述了安全生产标准化的作用。     

某麦芽生产厂废水管理与处理实践研究

麦芽生产过程包括清选、浸麦、发芽、烘干以及除根等工序,废水主要来自于浸麦、发芽等工序。某麦芽生产厂根据麦芽过程用水和废水产生的特点,采用设备改进、加强工艺管理、用水管理、废水回用、提高员工技能等措施,通过源头削减和生产全过程控制,合理调节生产用水,降低生产用水量和废水产生量,麦芽生产水耗指标为2.4 m3水/吨麦芽。麦芽废水采用SBR工艺进行处理,出水水质满足排放标准要求。该麦芽企业废水管理和处理经验为同行业提供了较好的案例。     

焦化行业清洁生产指标体系的建立及应用研究

目前,焦化行业的清洁生产水平无量化标准,焦化企业间清洁生产水平无法量化比较,为此,将创新性地设立焦化行业的清洁生产指标体系和清洁生产指标体系的考核评分计算方法,将该体系应用于焦化行业的典型企业,对企业清洁生产水平量化打分,并进行了普适性研究。该方法的提出可以很好的解决对不同清洁生产水平的企业进行量化排序的问题,从而达到既能发现公司清洁生产潜力,又能够明确企业在同行业中的位置的目的。     

畜牧业清洁生产关键技术实例研究——生态发酵床在规模化养猪场的应用研究

畜牧养殖业最大的污染物就是畜禽粪便,在畜禽养殖也实施清洁生产技术十分必要,将粪便在产生的环节上降低污染物的产生和排放,结合具体实例,按照企业清洁生产审核程序要求,对一家生猪养殖场进行清洁生产审核,对生态发酵床技术在规模化养猪场的应用进行深入研究,从技术、环境、经济三个方面阐述这项清洁生产技术的示范作用。     

糖蜜酒精厂环境保护验收清洁生产评价研究

糖蜜是糖厂榨糖后的副产品,含有可发酵性的糖45％∽52％,是直接用于发酵生产酒精的较好的原料.文章以广西某糖蜜酒精厂为例,在调查了解酒精厂生产工艺与装备、资源能源利用指标、污染物产生指标、废物回收利用率和环境管理要求等五个方面的基础上,认真细致分析环境保护竣工验收监测数据及生产报表数据,按照（HJ 581-2010）《清洁生产标准酒精制造业》（国家环境保护部）的要求对酒精厂清洁生产水平进行评价,并根据评价结果提出进一步提高清洁生产水平的建议和要求.