飞灰回燃在电站锅炉中的应用

针对兴澄钢铁有限公司电站锅炉存在的问 题，简介飞灰回燃技术。探讨飞灰回燃在电站锅炉中应 用的必要性、应用情况、可行性。     

稠油采油污水回用于热采锅炉用水的研究

利用曝气除油、引气气浮、化学除硅、树脂吸附和软化的方法对稠油污水进行处理，出水完全达到热采锅炉用水指标，可用于热采锅炉给水，为解决污水排污染环境和热采生产供水不足的矛盾提供了可行的技术工艺。     

Static modeling of dynamic recreation behavior: Implications for prediction and welfare estimation

This paper examines the consequences of using a static model of recreation trip-taking behavior when the underlying decision problem is dynamic. Specifically we examine the implications for trip forecasting and welfare estimation using a panel dataset of Lake Michigan salmon anglers for the 1996 and 1997 fishing seasons. We derive and estimate both a structural dynamic model using Bellman's equation, and a reduced-form static model with trip probability expressions mimicking those of the dynamic model. We illustrate an inherent identification problem in the reduced-form model that creates biased welfare estimates, and we discuss the general implications of this for the interpretation of preference parameters in static models. We then use both models to simulate trip taking behavior and show that although their in-sample trip forecasts are similar, their welfare estimates and out-of-sample forecasts are quite different.     

Gravimetric and Chemical Features of Airborne PM10 AND PM2.5 in Mainland Portugal

This paper describes concentration amounts of arsenic (As), particulate mercury (Hg), nickel (Ni) and lead (Pb) in PM₁₀ and PM_2.5, collected since 1993 by the Technological and Nuclear Institute (ITN) at different locations in mainland Portugal, featuring urban, industrial and rural environments, and a control as well. Most results were obtained in the vicinity of coal- and oil-fired power plants. Airborne mass concentrations were determined by gravimetry. As and Hg concentrations were obtained through instrumental neutron activation analysis (INAA), and Ni and Pb concentrations through proton-induced X-ray emission (PIXE). Comparison with the EU (European Union) and the US EPA (United States Environmental Protection Agency) directives for Ambient Air has been carried out, even though the sampling protocols herein – set within the framework of ITN's R&D projects and/or monitoring contracts – were not consistent with the former regulations. Taking this into account, 1) the EU daily limit for PM₁₀ was exceeded a few times in all sites except the control, even if the number of times was still inferior to the allowed one; 2) the EU annual mean for PM₁₀ was exceeded at one site; 3) the EPA daily limit for PM_2.5 was exceeded one time at three sites; 4) the EPA annual mean for PM_2.5 was exceeded at most sites; 5) the inner-Lisboa site approached or exceeded the legislated PMs; 6) Pb levels stayed far below the EU limit value; and 7) concentrations of As, Ni and Hg were also far less than the reference values adopted by EU. In every location, Ni appeared more concentrated in PM_2.5 than in coarser particles, and its levels were not that different from site to site, excluding the control. The highest As and Hg concentrations were found in the neighbourhood of the coal-fired, utility power plants. The results may be viewed as a “worst-case scenario” of atmospheric pollution, since they have been obtained in busy urban-industrial areas and/or near major power-generation and waste-incineration facilities.     

山西省低热值燃煤电厂煤粉炉SO2和NOx超低排放工艺技术路线探讨

燃煤电厂污染物排放实施超低排放是中国燃煤电站绿色火电的大方向,煤电进入超低排放阶段,实施超低排放标准对电厂的污染物治理提出了更为苛刻的要求。为了在环境影响评价中落实超低排放可行措施,使SO2和NOx 达到超低排放标准,本文根据山西省低热值燃煤电厂实际环境影响评价过程中遇到超低排放工艺技术路线的问题,针对煤粉锅炉燃用高灰分、高硫分、热值低的煤质情况,介绍了大气污染物脱硫和脱硝的超净排放工艺方案,指出采用“石灰石-石膏湿法”脱硫双循环技术;锅炉低氮燃烧技术+SCR脱硝工艺技术(3+1层),可以满足山西省超低排放限值要求。     

基于CES生产函数的企业安全投资决策方法研究

在分析当前我国安全投资决策研究基础上,讨论安全投资的边际效益理论,并利用其确定安全投资总量的合理值。利用不变替代弹性(CES)生产函数建立安全投入产出效益函数,反映安全投资结构对安全产出的影响,通过模型求解得到企业安全资源分配的优化结构和投资额。按边际效益理论和安全投资效益模型将有限的资源科学地配置到安全生产过程中去,有利于节约资本,实现安全效益最大化。     

DDNP废水处理新方法研究

DDNP是一种重要的起爆药，其生产废水成份复杂，用传统工艺处理难度较大且不经济。鉴于此，经研究总结得出DDNP废水处理新工艺：先用锅炉废烟气蒸发浓缩，再焚烧的方法，即处理了废水，又降低了锅炉烟尘。是一种低成本、低能耗以废治废的经济实用方法。     

循环流化床锅炉局部磨损问题及控制

对循环流化床锅炉(以下简称CFBB)局部磨损的机理进行了分析，总结了几种控制防磨措施，为CFBB正常维护提出了几点建议。     

卧式锅炉烟管拼接问题探讨

通过对锅炉烟管破坏强度的理论分析，提出了卧式锅炉烟管在制造、维修过程中不宜采用拼接形式的建议。     

锅炉除尘水微孔管式过滤技术

通过对锅炉除尘水处理方法的选择，介绍了微孔过滤技术，总结了微孔过滤技术在实际中的运用。