DCL型固硫技术在大型高压煤粉锅炉的应用

通过对固硫剂输送、喷射设施的优化及不同Ca/S摩尔比、不同喷射方式下锅炉SO2的削减量,证实了DCL型燃煤固硫剂是一种投资少、占地小、效率高的新技术,可在220t/h高压煤粉锅炉使用.     

DCL型固硫技术在大型高压煤粉锅炉的应用

通过对固硫剂输送、喷射设施的优化及不同Ca/S摩尔比、不同喷射方式下锅炉SO2的削减量,证实了DCL型燃煤固硫剂是一种投资少、占地小、效率高的新技术,可在220t/h高压煤粉锅炉使用。     

新型固硫节煤剂在供热锅炉系统中的应用

长庆油田矿区服务事业部各生活小区锅炉90%的能源用于小区采暖供热,锅炉供热能耗大,效率低。为降低供热能耗,2012年1月对庆城基地锅炉系统中的SZL14--1.0/95/70型号锅炉使用固硫节煤剂的应用效果进行了现场试验对比。试验证明:通过添加新型固硫节煤剂能改善炉膛燃烧氛围、促进燃烧完全,降低炉渣含碳量,提高热效率7%,节煤率12%。同时,固硫效果明显,烟尘排放CO、SO2明显减少。     

控制型煤SO2污染的研究

本文利用二氧化锰，氧化钙和碳酸钙为固硫剂，掺入煤炭中制成型煤进行固硫，经实验分析表明，固硫效果好，减轻了环境污染，并具有节能效果。     

蜂窝煤浸涂固硫技术研究

蜂窝煤内掺石灰等固硫是传统的蜂窝煤固硫技术,由于其存在着固硫剂用量大,配方较复杂,固硫促进剂来源不够广泛,且价格较贵,加工较繁等一系列具体问题,一直没有大面积推广,因此,探索新的成本低廉、简便易行的蜂窝煤固硫技术是一项急待解决的问题。我们进行了直接用蜂窝煤浸涂固硫剂和固硫促进剂组成的涂料固硫技术的研究,用雁门硫铁矿含85％以上白云石的尾矿废渣,黄泥.硫酸废渣、石灰、膨润土等作为固硫剂,以氧化     

助燃脱硫剂

青岛市润邦化工有限公司开发、青岛市环境保护局推荐的助燃脱硫剂适用于一切燃煤领域，并可用于废弃沥青油毡及橡塑废弃物制品焚烧处理中的除烟固硫。主要技术内容采取在B型矿石固硫剂中添加硅酸盐物F型矿石的方法，促使燃煤的高温产物生成不易分解的含硫复盐，以达到高温固硫的目的。在固硫剂中添加F型矿石粉末，构成了一种新的固硫剂，F型矿石是一种具有特殊性质的硅酸盐矿物，价格低廉，具有一般矿物所没有的独特的晶体结构，含有一定量的水分和大量的孔隙，具有热稳定性等优点。它可以吸附燃煤释放的SO２，使其不进入排放的烟气中，…     

GMX型煤成型机

由杭州久隆实业公司、机械部第二设计研究院开发、浙江省环境保护局推荐的ＧＭＸ型煤成型机,主要适用于６～１０ｔ以下的工业锅炉。其主要技术内容是：原煤添加固硫剂后至给料螺旋煤斗,经双层筛分后原煤分离出去,粉煤至成型机轧制成型煤与原煤混合进锅炉燃烧。其技术关...     

控制煤中SO2排放的技术对策分析

在分析我国煤炭资源状况、煤中硫的赋存状态和燃煤引起的SO2污染状况的基础上，探讨了国内外控制SO2排放的研究现状，研究了燃烧前、燃烧中和燃烧后三大类脱硫方法的可行性与适用范围。研究认为，对洗选脱硫要先对煤中硫的赋存状态进行研究，否则效率难以得到保证；固硫剂脱硫比较适合我国国情，但脱硫效率有待提高。固硫剂脱硫和洗选脱硫可结合使用，以提高脱硫率。     

我国民用成型煤的固硫技术

我国每年民用耗煤量达1.5亿吨,其中80％采用原煤散烧方式,成型煤仅古20％,在民用成型煤中添加固硫剂的则更少。当前我国城市大气污染主要是煤烟型污染,从我国的国情出发,解决大气污染的有效途径是合理使用煤炭,如对民用成型煤添加固硫剂等。     

一种适合我国国情的烟气脱硫技术--荷电干式吸收剂喷射脱硫系统(CDSI)

介绍目前我国的几种主要脱硫技术,并且在脱硫率、工程投资、占地等方面进行一些简单的比较,并着重介绍荷电干式吸收剂喷射脱硫系统的基本工作原理及其在应用上的主要优点.     

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…     

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.     

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.     

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.