SCR反应器短直进口段混氨技术研究

摘要：OI^2-SCR技术根据流场适应型设计理论设计了喷氨装置；以“主动利用不均”代替传统的“单—尺度的平均化”理念进行喷氨操作，在SCR反应器短直进口段内实现了良好的NH3／NOx混合效果，进而解决了改造工程中常见的空间制约问题。同时，充分发挥了有限体积的催化剂的效能，在较低氨逃逸率的前提下，实现了较高的脱硝效率。     

烟气脱硝工艺及其化学反应机理

概述了工业固定源NOx的控制措施，包括燃烧过程控制和燃烧后减少NOx排放。介绍两种主要的烟气脱硝工艺SNCR和SCR的特点、布置及所要求的温度范围，正在商业化应用的SCR工艺的催化荆组成、活性组分及其他组分的作用。提出了这一催化体系中还需要进一步澄清的某些化学机理。     

选择性非催化还原法烟气脱氮氧化物工艺

详细地介绍了选择性非催化还原法（SNCR）烟气脱NOx，技术的基本原理、性能影响因素、SNCR系统流程及其主要组成。列举了某一燃煤电厂SNCR的主要设计参数。     

嵩屿电厂烟气SCR脱硝工艺及特点分析

介绍了厦门嵩屿电厂4×300MW燃煤机组烟气选择性催化还原法(SCR)脱硝工程所选用的工艺,分析了SCR脱硝系统的主要技术特点,为日益增多的同类型脱硝装置的工艺设计与设备选型提供一定的借鉴。     

燃煤电厂污染控制技术进展与展望

综述了燃煤引起的大气污染及危害，并分燃烧前，燃烧中及燃烧后分析了目前所采用的污染控制方法中存在的问题，针对燃煤引起的污染提出了相应的控制措施。     

Modelling impacts of alternative farming management practices on greenhouse gas emissions from a winter wheat–maize rotation system in China

Agricultural production plays an important role in affecting atmospheric greenhouse gas concentrations. Field measurements were conducted in Quzhou County, Hebei Province in the North China Plains to quantify carbon dioxide (CO₂) and nitrous oxide (N₂O) emissions from a winter wheat–maize rotation field, a common cropping system across the Chinese agricultural regions. The observed flux data in conjunction with the local climate, soil and management information were utilized to test a process-based model, Denitrification–Decomposition or DNDC, for its applicability for the cropping system. The validated DNDC was then used for predicting impacts of three management alternatives (i.e., no-till, increased crop residue incorporation and reduced fertilizer application rate) on CO₂ and N₂O emissions from the target field. Results from the simulations indicated that (1) CO₂ emissions were significantly affected by temperature, initial SOC, tillage method, and quantity and quality of the organic matter added in the soils; (2) increases in temperature, initial SOC, total fertilizer N input, and manure amendment substantially increased N₂O emissions; and (3) temperature, initial SOC, tillage, and quantity and quality of the organic matter added in the soil all had significant effects on global warming. Finally, five 50-year scenarios were simulated with DNDC to predict their long-term impacts on crop yield, soil C dynamics, nitrate leaching losses, and N₂O emissions. The modelled results suggested that implementation of manure amendment or crop residue incorporation instead of increased fertilizer application rates would more efficiently mitigate GHG emissions from the tested agro-ecosystem. The multi-impacts provided a sound basis for comprehensive assessments on the management alternatives.     

Greenhouse gases fluxes and soil thermal properties in a pasture in central Missouri

Fluctuations of greenhouse gases emissions and soil properties occur at short spatial and temporal scales, however, results are often reported for larger scales studies. We monitored CO2, CH4, and N2O fluxes and soil temperature (T), thermal conductivity (K), resistivity (R) and thermal di usivity (D) from 2004 to 2006 in a pasture. Soil air samples for determination of CO2, CH4 and N2O concentrations were collected from static and vented chambers and analyzed within two hours of collection with a gas chromatograph. T, K, R and D were measured in-situ using a KD2 probe. Soil samples were also taken for measurements of soil chemical and physical properties. The pasture acted as a sink in 2004, a source in 2005 and again a sink of CH4 in 2006. CO2 and CH4 were highest, but N2O as well as T, K and D were lowest in 2004. Only K was correlated with CO2 in 2004 while T correlated with both N2O (r = 0.76, p = 0.0001) and CO2 (r = 0.88, p = 0.0001) in 2005. In 2006, all gases fluxes were significantly correlated with T, K and R when the data for the entire year were considered. However, an in-depth examination of the data revealed the existence of month-to-month shifts, lack of correlation and di ering spatial structures. These results stress the need for further studies on the relationship between soil properties and gases fluxes. K and R o er a promise as potential controlling factors for greenhouse gases fluxes in this pasture.     

氨法烟气脱硫工艺实验研究

利用亚硫酸铵作为吸收剂进行氨法烟气脱硫模拟实验,主要考察了吸收液进塔pH值、液气比、吸收液浓度、进口SO2浓度、进口烟气温度等主要影响因素对脱硫效率的影响,并从理论上分析了它们之间的内在关系,得出了适宜的操作条件范围。     

烟气多污染物控制技术研究进展

介绍了美国俄亥俄州R.E.Burger燃煤电厂采用电催化氧化（ECO）技术控制多种污染物排放的示范项目。该ECO系统可以有效减少SO2,NOX,PM2.5,Hg的排放量,实现多污染物控制一体化,副产品可以有效利用,投资费用低,占地面积少。     

浅谈烟气调质系统在电厂中降低烟尘排放量的应用

通过烟气调质,来降低烟气温度,同时降低飞灰比电阻,使除尘效率得到提高,电厂周围环境得到保护。该系统的使用在其它电厂也得到应用。