电厂燃煤锅炉同时脱硫脱氮技术与分析

详细介绍几种典型电厂燃煤锅炉同时脱硫脱氮技术 ,并对其进行技术和经济比较。认为活性焦吸附法属于干法处理技术 ,最具有竞争力。     

Synergistic removal of nitrogen monoxide using non-thermal plasma and catalyst simultaneously

An experimental system of De-NO with plasma-catalyst（Cu zeolite） was established to investigate the differences between De- NO with plasma-catalyst and De-NO only with plasma, to provide the instruction for selecting appropriate catalyst and operating condition, The characteristics of De-NO with plasma and De-NO with plasma-catalyst were investigated comparatively by experiments. The experimental results show that De-NO with plasma-catalyst has high NO removal rate; Cu zeolite is an effective catalyst which can promote NO removal rate in plasma remarkably; De-NO with plasma-catalyst should be operated at low temperature and the temperature has opposite effects on the function of catalvst and plasma; water vapor and O2 can increase the NO removal rate.     

NO_X大气化学概论及全球NO_X释放源综述

NOX 在全球大气环境、气候变化和地圈N生物地球化学循环中起着极其重要的作用。本文综述了NOX 大气浓度增长对对流层大气O3污染、大气氧化能力和酸沉降及平流层O3消耗的影响 ;同时探讨了全球NOX 释放源组成、年释放总量和人类活动的贡献 ,并与N2 O的源组成进行了对比。     

以干吸着剂喷射法同时脱除SO2和NO的实验研究

炉膛吸着制度射（ＦＳＩ）与选择性非催化还原（ＳＮＣＲ）相结合同时脱除ＳＯ＿２和ＮＯ，在夹带流反应器中进行实验研究。在８００－１２００℃下喷射石灰石／尿素吸着剂或石灰石／铵盐吸着剂能同时脱除ＳＯ＿２和ＮＯ。石灰石／尿素吸着剂表现出最高的脱硫脱硝能力，当Ｃａ／Ｓ＝２和Ｎ／ＮＯ＝２时，其ＳＯ＿２和ＮＯ脱除率分别能达到９０％和８０％。主要的ＮＯ脱除是ＮＨ＿３与ＮＯ反应生成Ｎ＿２所致，少量的ＮＯ脱除率（１０％）是在ＣａＳＯ＿４的催化下，ＣａＯ与ＮＯ反应生成Ｃａ（ＮＯ＿２）＿２的结果。本文还考察了反应温度和时间对脱硫脱硝反应速度的影响。     

1-硝基芘和多环芳烃联合致突变性的研究

测定了１－硝基芘（１－ＮＰ）和其它（硝基一）多环芳烃对Ａ试验的６个菌株（ＴＡ９８，ＴＡ１００，ＹＧ１０２１，ＹＧ１０２４，ＹＧ１０２６，ＹＧ１０２９）的单一和联合致突变性，１，６－二硝基芘（１．６ＤＮＰ）、１－硝基芘（１－ＮＰ）和２－硝基坊（２－ＮＦ）所单一致突变性都为ＹＧ１０２４，ＹＧ１０２１，ＴＡ９８，ＹＧ１０２６，ＹＧ１０２９，ＴＡ１００，地２－ＮＦ的敏感性稍有差别，联合致突变性实验结果表明     

中国上空民航飞机NO_x排放量及其分布初探

在中国范围内民航运输飞机及所配装的发动机的型号和有关设计工作参数等的基础上,借鉴目前国际上通行的方法,对飞机与发动机的运行过程进行简化和建模,并根据国际民航组织(ICAO)和美国航空航天管理局(NASA)等公布的航空发动机在海平面静态的排放数据,采用国际通用的油流量算法,对1997年中国上空民航飞机的氮氧化物(NOx)排放量进行了估算,并结合国内外有关数据进行了分析和比较.结果表明,中国各城市上空的大气污染程度有很大不同,大部分城市上空的大气目前已处于轻度污染,个别城市上空的大气污染程度已相当于欧美等发达国家1992年初的排放水平,其严重性亟待引起政府部门和有关专家的注意.     

衡阳市城区大气污染现状及趋势分析

根据衡阳市环境监测站1990-2003年主要大气污染因子监测资料。分析了衡阳市城区大气污染的现状及污染程度．结果表明：衡阳市城区大气污染物主要是TSP、SO2、NO2。冬季是大气污染最严重的季节，夏季则相对较轻。     

酸雨中SO42-、NO3-、Ca2+、NH4+对红壤中重金属的影响

在实验室条件下连续浸泡污染红壤和黄红壤,研究模拟酸雨中阴离子、阳离子浓度对土壤中重金属解吸行为和化学形态分布的影响.结果表明,酸雨加速了土壤酸化,重金属活性增强.增加模拟酸雨中SO42-、NO3-或Ca2+、NH4+浓度对Cd、Zn解吸行为均产生明显促进作用,但对Cu影响不明显.增加模拟酸雨中SO42-、NO3-浓度,红壤和黄红壤交换态Cd、Zn百分率明显降低,交换态Cr百分率明显增加,交换态Cu百分率稍有提高,交换态Pb百分率变化不明显;增加模拟酸雨中Ca2+、NH4+浓度,红壤和黄红壤交换态Cd、Cu、Zn百分率明显降低,交换态Cr和活性形态Pb明显增加,但Cu的化学形态分布主要受模拟酸雨pH值的影响.     

Production and Consumption of NO in Forest and Pasture Soils from the Amazon Basin

NO production and the rate constant of NO consumptionin soil samples from Amazonian forest and pasturesites were determined in the laboratory. The purposewas to study NO production and consumption in soilsfrom both types of land use as functions of soiltemperature and soil moisture. NO productionincreased exponentially with soil temperature. Thedegree of increase depended on soil moisture,indicating that the response of NO production to achange in soil temperature is most pronounced at acertain intermediate soil moisture. NO productionpeaked at a soil moisture of 0.10 g g^-1, correspondingto 0.27 and 0.38 water-filled pore space for forestand pasture soils, respectively. The optimum soilmoisture for which maximum NO release was observedwas independent of soil temperature. NO consumptionwas most efficient at high soil temperatures andunder dry soil conditions. NO release wasapproximately 10 times larger for forest than pasturesoil. The difference may be related to the higherNO₃ ^- content in forest soil.