能源发展的资源环境约束条件分析

随着经济的高速增长,我国对能源的需求也将持续增长,能源短缺和环境污染的压力也会随之增加,而环境容量的过度使用,又会反过来约束能源的发展。在＂十二五＂期间确定我国的能源发展方向将成为我们重点研究的问题,对我国能源供应和消费现状进行调查研究,提出近几年来我国的能源生产总量持续小于能源消费总量,供需缺口呈现逐步上升的趋势。在此基础上,全面和系统的梳理环境质量、功能分区、总量控制和低碳经济等能源发展的环境约束条件,有助于实现能源的可持续发展,并且为进一步改革现有的能源环境政策提供参考。     

两人在单位澡堂洗澡同时被烫伤是否都可以认定为工伤

主持人,你好!我煤矿一名综采工人张某上午下夜班升井后,去公司的职工澡堂洗澡。在澡堂同一水池泡澡的还有另一名综采工人李某。李某当日歇班,晨练后来职工澡堂洗澡。在泡澡过程中,二人被突然注入水池的热水烫伤。张某、李某被送往医院救治。之后,二人都提出了工伤认定申请,请问他们能否被认定为工伤?易安网友易安网友,你好!根据《工伤保险条例》第十四条规定,职工有下列情形之一的,应当认定为工伤:(二)工作时间前后在工作场所内,从事与工作有关的预备性或者收尾性工作受到事故伤害的。     

江西华齐铜多金属矿区含矿硅质岩的地球化学特征及成因探讨

矿产远景地质调查过程中,在江西华齐铜多金属矿区发现含矿硅质岩.测试分析显示,区内硅质岩贫Al2O3、TiO2,Co、Cr等元素含量低,贫∑REE,δ(Eu)为负异常,δ(Ce)为弱正异常,HREE相对富集等热水沉积物的特征.在判别硅质岩形成的系列图解上,样品均指示热水沉积作用和大陆边缘环境,这与SiO2/Al2O3、SiO2/(K2O+Na2O)、SiO2/MgO、MnO/TiO2、K/Rb等特征值所指示的结果相一致.本区硅质岩地球化学特征及其对比结果说明该区域构造演化的复杂性.在元古代华南海槽构造演化中在华夏地块边缘发生断裂拉张,形成断陷盆地,并发生了热水喷流沉积成岩成矿作用.本区硅质岩与成矿关系密切,研究硅质岩对于认识区域构造演化及寻找矿化体具有重要意义.     

Microbial community functional structure in response to micro-aerobic conditions in sulfate-reducing sulfur-producing bioreactor

Limited oxygen supply to anaerobic wastewater treatment systems had been demonstrated as an effective strategy to improve elemental sulfur(S0) recovery, coupling sulfate reduction and sulfide oxidation. However, little is known about the impact of dissolved oxygen(DO) on the microbial functional structures in these systems. We used a high throughput tool(GeoChip) to evaluate the microbial community structures in a biological desulfurization reactor under micro-aerobic conditions(DO: 0.02–0.33 mg/L). The results indicated that the microbial community functional compositions and structures were dramatically altered with elevated DO levels. The abundances of dsrA/B genes involved in sulfate reduction processes significantly decreased(p 0.05, LSD test) at relatively high DO concentration(DO: 0.33 mg/L). The abundances of sox and fccA/B genes involved in sulfur/sulfide oxidation processes significantly increased(p 0.05, LSD test) in low DO concentration conditions(DO: 0.09 mg/L) and then gradually decreased with continuously elevated DO levels. Their abundances coincided with the change of sulfate removal efficiencies and elemental sulfur(S0) conversion efficiencies in the bioreactor. In addition, the abundance of carbon degradation genes increased with the raising of DO levels, showing that the heterotrophic microorganisms(e.g., fermentative microorganisms) were thriving under micro-aerobic condition. This study provides new insights into the impacts of micro-aerobic conditions on the microbial functional structure of sulfatereducing sulfur-producing bioreactors, and revealed the potential linkage between functional microbial communities and reactor performance.     

太阳能热水系统性能测试技术及结果分析

太阳能作为可再生能源家族中,资源量最大、分布最普遍,初投资较为经济的能源,在示范地区得到大力推广。本文就江西省太阳能资源特点和太阳能热水系统性能测试结果进行分析。     

地缘政治动荡对中国能源环境的全局经济影响及其对策

乌克兰危机正深刻影响着全球能源供应形势。由于中国较高的油气对外依存度,地缘政治的不确定性对中国能源安全特别是油气的供应和经济安全有重大影响,油气进口的供应短缺会对中国社会经济及能源环境造成怎样的冲击？为此,该研究采用可计算一般均衡模型,刻画了进口供应中断和价格管制行为,从全局经济角度评估不同程度的油气进口供应短缺对中国社会经济和能源环境的影响,并设计了两套包括强化上游开发和发展可再生电力的配套措施。结果表明：(1)油气进口供应短缺会对中国GDP和城乡居民福利带来负面影响,且中断程度越强所造成的负面冲击越大。(2)从能源消费端来看,煤炭受GDP损失和能源替代的叠加影响,总体需求相对稳定;石油需求出现大幅下降;而天然气得益于国内大幅增产和价格管制,其需求降幅不大。从能源生产端来看,GDP损失使得能源需求下降,导致电力生产下降;煤炭生产受GDP损失及对能源替代的叠加作用,总体变化不大;而油气生产受价格抬高和供应中断的刺激,产量大幅上升。(3)油气进口供应中断有助于减少碳排放,同时也有较明显的协同减排效果。(4)强化上游开发和发展可再生电力均有助于减缓油气进口供应短缺对社会经济带来的负面冲击。...     

未来建筑给排水展望

本文从建筑给排水、热水供应、消防给水等几个方面对未来21世纪发展趋势给予展望.     

SCADA系统在燃气管网地震紧急处置中的应用研究

燃气管网的地震破坏有时会导致火灾、爆炸等严重的次生灾害.城市中的燃气管网系统若能具备地震预警及紧急处置功能,在地震来临时及时采取自动关闭燃气供应阀门等紧急处置措施,可以避免或减少管道破裂后燃气泄漏造成的次生灾害的发生.     

点将台

<正>本期点题来自贵阳市云岩区付俊Q:如何强化基层安全管理人员的管理权限? A付俊,你好!我们集团公司是一家以房屋建筑施工为主业的企业,集团的安全管理主要对象是劳务分包单位、专业承包单位、设备供应商、设备租赁商等资源提供方。就建筑行业而言,强化基层安全管理人员管理权限,个人认为应从两个方面入手:     

Cleaning the energy sources for water heating among Nanjing households: barriers and opportunities for solar and natural gas

Energy for water heating accounts for an increasing part in residential energy demand in China. An extensive survey was conducted to analyze the determinants of household energy choices for water heaters among residents in Nanjing, China. Two sets of variables were examined as potential influences： building features and household socio-economic characteristics. Results suggest that building features such as gas availability and building structures, and household characteristics such as household head＇s education degree and energy-conserving sense are crucial determinants in choosing natural gas as water heater energy. Installation permission for solar water heater, building stories, and residential location serve as determining factors in choosing solar water heaters. Based on these, barriers and opportunities are discussed for transitions toward cleaner water heating energies, and suggestions are given for local governments to promote cleaner energy replacement in China.