改善西宁市空气质量的几点建议

通过介绍西宁市空气污染的现状及其原因 ,提出以电热锅炉取代燃煤锅炉的建议 ,并结合实际分析了电热锅炉在西宁市推广应用的可行性 ,指出以电热锅炉取代燃煤锅炉是有效控制西宁市一、四季度的空气污染的最佳选择。     

水管式型煤锅炉

由牡丹江市汇通锅炉制造有限公司开发的水管式型煤锅炉,适用于小区供暖、洗浴、生产用蒸汽等诸多领域。主要技术内容一、基本原理水管式型煤锅炉是一种按型煤燃烧机机理要求设计的,取代传统散烧锅炉的专用产品。其节能效果优于传统锅炉(节煤18%),且无烟尘及噪声污染。     

锅炉柔性密封技术

由上海岱山电力安装工程有限公司开发的锅炉柔性密封技术,适用于锅炉密封。主要技术内容一、基本原理锅炉柔性密封技术以动态吸收锅炉膨胀为密封理念、以专业密封用陶瓷纤维及与之配套研制的高温黏合剂作为密封材料、以自     

DZL型生物质颗粒燃料工业锅炉

由北京盛昌绿能科技有限公司开发的DZL型生物质颗粒燃料工业锅炉,适用于工业生产、供暖、洗浴锅炉。主要技术内容适用生物质颗粒燃料的新型锅炉,本体采用新型锅壳锅炉结构,由纵置的锅筒、左右下集箱、炉膛水冷壁、烟道水冷壁、螺纹烟管及下降管等组成;燃烧     

四川省锅炉大气污染物排放标准制订研究

锅炉作为重要的热能动力设备,其排放的废气对环境空气质量造成的污染影响不容忽视.为了严格控制锅炉大气污染物排放,巩固燃煤锅炉淘汰及改造成果,四川省开展了锅炉大气污染物排放标准制订研究工作.研究主要采用了调研及数据统计的方法,对国内地方排放标准、四川省空气质量状况、四川省锅炉使用及排放现状、燃气锅炉低氮燃烧技术等进行了分析...     

燃煤锅炉常见各种除尘器使用现状及存在的问题

通过对城市锅炉除尘器使用现状的调查,重点从除尘器的性能、使用效率等方面入手分析了各类除尘器的优劣和适用性。结合锅炉类型、燃烧方式、煤质、锅炉操作运行的控制管理、除尘器的正确使用等影响除尘效率的因素,找出其存在的问题,总结出我国一般城市消烟除尘工作的基本情况。为燃煤锅炉使用者在选择除尘器方面提供依据。     

青海省西宁市工业、采暖锅炉分布调查研究

西宁市是以煤炭为主要能源的城市,每年工业和采暖用煤约260余万吨,其中70%用于各类锅炉燃烧.锅炉燃煤产生大量烟尘、有害物质,污染大气环境.为此,现将锅炉分布及其对大气环境污染现状分析报告如下.l 锅炉及其设施的分布(l)工业、采暖锅炉数量1991年3月至1992年10月的调查,全市有工业、采暖锅炉1098台,3238.2蒸吨.其中城东区380台,城中区253台、城西区257台、城北区208台,分别占总数的34.6%、23.     

燃气锅炉与燃煤锅炉的比较

(续上期 )天然气工程在西宁市的启动 ,标志着西宁市区的能源结构将要发生巨大的变化。以天然气代替传统燃料—煤 ,将彻底改变工业及采暖锅炉的燃料结构。燃气锅炉较燃煤锅炉具有以下优点 :第一、燃气锅炉不需要煤灰堆放地 ,节省用地。第二、节约锅炉辅助生产用水。燃煤锅炉和燃气锅炉正常生产用水相等 ,但燃气锅炉节约了燃煤锅炉用来除尘、除渣等防尘的辅助用水。第三、减少工作人员。燃气锅炉比燃煤锅炉辅助设备少 ,所需工作人员少 ,负担工资及福利费用就要少得多。第四、节省锅炉生产用电费用。燃气锅炉燃料输送及其它辅助设备少 ,功率小 …     

超导热管组合分流式换热装置

##正##由辽阳市白塔区铸铖高效节能设备厂开发的超导热管组合分流式换热装置,可广泛应用于各行业的蒸汽锅炉、供暖锅炉、工业窑炉及工业油炉。主要技术内容一、基本原理超导热管组合分流换热装置是采用高新热能转换技术研制出的新型专利产品,其原理是利用锅炉排烟余热,对锅炉上水进行加热,在短时间内可将锅炉上     

中小型燃煤锅炉的清洁能源改造

《广东省工业锅炉污染整治实施方案(2012~2015年)》和《广东省大气污染防治行动方案(2014~2017年)》,广东省内的中小燃煤锅炉更新改造效益显著。文章对广东省中小型燃煤锅炉淘汰、更新改造的原则、目标和技术进行了总结,为有关部门和锅炉用户开展锅炉淘汰、更新改造工作提供建议和意见,促进各地中小锅炉进一步提高能效,消化环保政策带来能源成本激增的负面影响。     

回顾 总结 部署

3月26日至3月28日,备受关注的2003年度中国石油集团公司安全生产环境保护职业健康工作会议在青岛召开。 会议期间王海森主任做了题为“与时俱进,开拓创新,推进安全环境健康工作再上新水平”的报告,指出此次会议的主要任务是:总结回顾过去三年安全生产,环境保护和职业健康工作,分析形势,安排部署2003年工作,推进安全环境健康工作再上新水平。回顾三年的成绩,主要体现在:安全环保健康目标和责任制不断落实;安全环保健康规章制度逐步完善;安全环保机构得到加强和充实;健康安全环境管理体系全面推进;建设项目环境管理规范进行;安全环保科技创新…     

Atrazine, isoproturon, mecoprop, 2,4-D, and bentazone adsorption onto iron oxides

Iron oxides are important components influencing the adsorption of various inorganic and organic compounds in soils and sediments. In this study the adsorption on iron oxides of nonionic and ionic pesticides was determined as a function of solution pH, ionic strength, and pesticide concentration. The investigated iron oxides included two-line ferrihydrite, goethite, and lepidocrocite. Selected pesticides comprised atrazine (6-chloro-N2-ethyl-N4-isopropyl-1,3,5-triazine-2,4-diamine), isoproturon [3-(4-isopropylphenyl)-1,1-dimethylurea)], mecoprop [(RS)-2-(4-chloro-2-methylphenoxy)propionic acid], 2,4-D (2,4-dichlorophenoxyacetic acid), and bentazone [3-isopropyl-1H-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxide]. The adsorption of the nonionic pesticides (atrazine and isoproturon) was insignificant, whereas the adsorption of the acidic pesticides (mecoprop, 2,4-D, and bentazone) was significant on all investigated iron oxides. The adsorption capacity increased with decreasing pH, with maximum adsorption reached close to the pKa values. The addition of CaCl2 in concentrations from 0.0025 to 0.01 M caused the adsorption capacity to diminish. The adsorption of bentazone was significantly lower than the adsorption of mecoprop and 2,4-D, illustrating the importance of a carboxyl group in the pesticide structure. The adsorption capacity on the iron oxides increased in the order: lepidocrocite < goethite < two-line ferrihydrite. The maximum adsorption capacities of meco-prop and 2,4-D on goethite were found to be equivalent to the site density of singly coordinated hydroxyl groups on the faces of the dominant (110) form, suggesting that singly coordinated hydroxyl groups are responsible for adsorption. Differences in adsorption capacities between iron oxides can be explained by differences in the surface site density of singly coordinated hydroxyl groups. The maximum measured adsorption capacity of mecoprop on two-line ferrihydrite was equivalent to 0.2 mol/mol Fe.     

Tillage, intercrop, and controlled drainage-subirrigation influence atrazine, metribuzin, and metolachlor loss

Atrazine (6-chloro-N2-ethyl-N4-isopropyl-1,3,5-triazine-2,4-diamine) and metolachlor [2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)acetamide] have been found with increasing occurrence in rivers and streams. Their continued use will require changes in agricultural practices. We compared water quality from four crop-tillage treatments: (i) conventional moldboard plow (MB), (ii) MB with ryegrass (Lolium multiflorum Lam.) intercrop (IC), (iii) soil saver (SS), and (iv) SS + IC; and two drainage control treatments, drained (D) and controlled drainage-subirrigation (CDS). Atrazine (1.1 kg a.i. ha-1), metribuzin [4-amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazine-5(4H)-one] (0.5 kg a.i. ha-1), and metolachlor (1.68 kg a.i. ha-1) were applied preemergence in a band over seeded corn (Zea mays L.) rows. Herbicide concentration and losses were monitored from 1992 to spring 1995. Annual herbicide losses ranged from < 0.3 to 2.7% of application. Crop-tillage treatment influenced herbicide loss in 1992 but not in 1993 or 1994, whereas CDS affected partitioning of losses in most years. In 1992, SS + IC reduced herbicide loss in tile drains and surface runoff by 46 to 49% compared with MB. The intercrop reduced surface runoff, which reduced herbicide transport. Controlled drainage-subirrigation increased herbicide loss in surface runoff but decreased loss through tile drainage so that total herbicide loss did not differ between drainage treatments. Desethyl atrazine [6-chloro-N-(1-methylethyl)-1,3,5-triazine-2,4-diamine] comprised 7 to 39% of the total triazine loss.     

Sustainability,eco-efficiency,life-cycle management,and business strategy

This article outlines some of the rationale for integrating environment and sustainablility issues into core business practises and provides some guidance on how companies can begin to take a strategic view when selecting environmental management tools. Two of these tools, life cycle management and eco-efficiency, are outlined in brief.© 1999 Five Wind International. Reprinted with permission by John Wiley & Sons, Inc.     

Environmental concentrations of agricultural herbicides in Saskatchewan, Canada: bromoxynil, dicamba, diclofop, MCPA, and trifluralin

Herbicides are the most commonly used group of agricultural pesticides on the Canadian Prairies and, in 1990, more than 20000 Mg of herbicides were applied in the provinces of Alberta, Saskatchewan, and Manitoba. The present paper reports on environmental concentrations of five herbicides currently used in the prairie region. The herbicides bromoxynil [3,5-dibromo-4-hydroxy-benzonitrile], dicamba [3,6-dichloro-o-anisic acid], diclofop [(RS)-2-[4-(2,4-dichlorophenoxy)-phenoxy]propanoic acid], MCPA [(4-chloro-2-methylphenoxy)acetic acid], and trifluralin [alpha,alpha,alpha-trifluoro-2,6-dinitro-N,N-isopropyl-p-toluidine] were measured in the atmosphere, bulk atmospheric deposits, surface film, and dugout (pond) water at two sites near Regina, Saskatchewan, during 1989 and 1990. All five herbicides were detected in air and surface film and all but trifluralin were detected in the bulk atmospheric deposits and dugout water. Trifluralin was most frequently detected in air (79% of samples) whereas bromoxynil was present in maximum concentration (4.2 ng m(-3)). MCPA was present in maximum levels in bulk atmospheric (wet plus dry) deposits (2350 ng m(-2) d(-1)), surface film (390 ng m(-2)), and dugout water (330 ng L(-1)), whereas dicamba was most frequently detected in surface film (47%) and dugout water (97%). The highest quantities of the herbicides tended to be present during or immediately after the time of regional application.