炭法烟气脱硫技术现状与趋势

介绍了炭法烟气脱硫在脱硫剂、脱硫工艺和设备等方面的应用现状和研究进展 ,分析了制约炭法烟气脱硫技术发展的原因 ,并提出 :开发新材料、新工艺 ,变传统的炭吸附法脱硫技术为炭催化法脱硫技术是炭法脱硫技术的发展方向     

炭法烟气脱硫技术现状与趋势

介绍了炭法烟气脱硫在脱硫剂、脱硫工艺和设备等方面的应用现状和研究进展，分析了制约炭法烟气脱硫技术发展的原因，并提出：开发新材料、新工艺，变传统的炭吸附法脱硫技术为炭催化法脱硫技术是炭法脱硫技术的发展方向。     

氢氧化镁在环境污染治理中的应用研究进展

本文综述了不同种类氢氧化镁工业产品的特性及其在废水处理、烟气脱硫等方面的应用进展 ,并讨论了在我国的应用趋势     

某脱硫添加剂在600MW机组湿法烟气脱硫系统中的应用研究

国内对于脱硫添加剂在石灰石-石膏湿法烟气脱硫系统中应用研究大多停留在实验室及小型脱硫系统中,对大型火电机组石灰石-石膏湿法烟气脱硫系统中的应用研究还不够深入.详细论述了某脱硫添加剂在600 MW机组上的应用情况,研究该脱硫添加剂加入后对脱硫系统效率的提升作用及对脱硫石膏和脱硫废水的影响,为大型火电机组石灰石-石膏湿法烟...     

氢氧化镁在环境污染治理中的应用研究进展

本文综述了不同种类氢氧化镁工业产品的特性有其在废水处理、烟气脱硫等方面的应用进展，并讨论了在我国的应用趋势。     

添加剂在大型石灰石-石膏湿法烟气脱硫系统中的工程应用实验研究

以某公司出品的脱硫添加剂在浙江北仑发电厂的实际工程应用实验为例,对脱硫添加剂在大型湿法烟气脱硫系统的工程应用进行了研究,考察其对脱硫效率的影响及可能带来的经济效益。实验结果表明600 MW容量发电机组配备的脱硫系统在添加剂使用后相似工况下脱硫效率分别可以提升8%,1 000 MW容量发电机组配备的脱硫系统可提升5%左右...     

脱硫反应器及其应用

脱硫反应器是脱硫工艺的核心装置 ,其技术和脱硫指标将制约和决定脱硫工艺的效率。在分析中 ,比较全面地介绍和比较了近年来主要的烟气脱硫反应器设备和研究成果及应用情况 ,指出了脱硫反应器的发展方向     

稀土氧化物在烟气脱硫过程中的应用研究进展

目前烟气脱硫是控制ＳＯ２排放最有效的途径之一。本文综述了以稀土氧化物作为吸收剂或催化剂在烟气脱硫过程中应用的研究进展,重点介绍了稀土氧化物吸收或催化脱硫反应的机理及特殊性能,并对稀土氧化物材料吸收或催化脱硫方法的特点及应用前景进行了讨论。     

半干法烟气脱硫除尘多级功能处理装置技术与应用

文中介绍了一种炉窑烟气调质、烟气除尘、烟气脱硫在一个单体结构中的一体化装置和在烟气除尘脱硫技术上的应用,并对该脱硫除尘装置与传统的半干法烟气脱硫除尘装置进行了比较。     

脱硫反应器及其应用

脱硫反应器是脱硫工艺的核心装置，其技术和脱硫指标将制约和决定脱硫工艺的效率。在分析中，比较全面地介绍和比较了近年来主要的烟气脱硫反应器设备和研究成果及应用情况，指出了脱硫反应器的发展方向。     

Estimation of uncertainty of sampling for analysis of pesticide residues

Abstract

A computer model was used to take random samples from primary sample populations obtained from field trials to simulate the uncertainty of sampling for residue analysis of plant commodities and soil. The results indicate about 40%, 30% and 20% relative uncertainty when random samples of size 5, 10 and 25 are taken respectively, from a single lot. Therefore the sample size should be the same for establishing and enforcing legal limits.     

不同泥源对厌氧氨氧化反应器启动的影响

采用2套上流式生物膜反应器,分别接种少量厌氧氨氧化污泥和大量硝化污泥,考察其对厌氧氨氧化反应器启动的影响。污泥接种入反应器后,测得接种厌氧氨氧化污泥的反应器(R1)内MLSS为0.22 g/L,另一个反应器(R2)MLSS为2.7 g/L。与直接接种厌氧氨氧化污泥相比,R1经过72 d的运行才显现出厌氧氨氧化特性。经过114 d的培养,前者氮去除速率由0.23 kg/(m3.d)提升到5.29 kg/(m3.d),总氮去除率大于89%;R2的氮去除速率由0.01 kg/(m3.d)提升到1.1 kg/(m3.d),总氮去除率大于84.6%。说明普通污泥启动需要一个较长的筛选过程,直接接种少量的厌氧氨氧化污泥比接种普通的污泥能够更快启动厌氧氨氧化反应器。     

次氯酸钠发生器的研制

介绍了电解法生产次氯酸钠的原理 ,并在原有生产工艺的基础上进行了重新设计和对设备的重新选择、改造 ,得出了各个工艺参数的最佳值 ,生产出高品质的次氯酸钠     

An application of the theory of kinematics of mixing to the study of tropospheric dispersion

The most common technique used for numerical simulations of tracer mixing is that of the numerical solution of the advection–diffusion equation with the unresolved fluxes parameterized using the similarity theory. Despite correct predictions of the overall directions of transport, models based on a numerical solution of the advection–diffusion equation lack sufficient accuracy to correctly reproduce the coupling of mixing with small scale processes which are sensitive to the microstructure of the tracer distribution. The objective of this paper is to revisit the basic formalism employed in numerical models used to investigate atmospheric tracers. The main mathematical method proposed here is the theory of kinematics of mixing which could be applied effectively for simulations of atmospheric transport processes. At the beginning of the paper, we introduce simple mathematical transformations in order to demonstrate how complex topological structures are created by mixing processes. These idealistic flow systems are essential to explain transport properties of much more complex three-dimensional geophysical flows. An example of the application of the kinematics of mixing to the analysis of tracer transport on a planetary scale is presented in the following sections. The complex filamentary structures simulated in the numerical experiment are evaluated using some commonly applied statistical measures in order to compare the results with the data published in the literature. The results of the experiment are also analysed with the help of simple conceptual models of fluid filaments. The microstructure of the tracer distribution introduced in the paper is essential to increase our understanding of atmospheric transport and to develop more realistic parameterizations of small-scale mixing. The presented results could also be used to improve calculations of the coupling between microphysical processes and tracer mixing.     

造纸废水混凝处理中SFT助凝替代性研究

中小造纸厂废水处理常用PAC作混凝剂 ,PAM作助凝剂。由于PAM成本很高 ,影响了处理设备的投运率。用超细滑石粉 (SFT)替代PAM助凝 ,与混凝剂PAC配合 ,其混凝处理效果基本相当 ,但是处理成本降低 0 .10元 /m3 。由于SFT属环境无害材料 ,不会给排泥带来二次污染     

红土吸附砷对其动电电位的影响

研究了遵义红土吸附砷对其动电电位的影响 ,从砷酸根浓度和体系pH对红土动电电位影响的角度作了探讨 ,结果表明 ,砷酸根离子浓度越大 ,Zata电位下降幅度越大 ,Zata电位也越低 ;随着体系pH的升高 ,氧化铁胶体动电电位逐渐下降 ,甚至改变了表面电位的符号。由此得出了红土吸附砷属于专性吸附的结论。     

活性炭三维电极法对印染废水的处理研究

对三维电极方法处理印染废水进行了实验研究,初步探讨了活性炭三维电极法处理印染废水的机理,对影响处理效果的各种要素,如反应时间、槽电压和pH值等进行了条件实验,得出了活性炭三维电极法处理印染废水的最佳运行条件为:停留时间120-180 min,槽电压25～30 V,进水pH值6.5～7.5。结果表明,该反应器能有效地降低废水色度,有较高的COD去除效率,并能提高印染废水的可生化性。     

生物质快速热裂解主要参数对生物油产率的影响

以松木木屑为原料,在自制的小型流化床上,开展了生物质热裂解温度、生物质粒径和进料速率对生物油产率的影响实验研究.结果表明,在热裂解温度分别为450、475、500、525和550℃条件下,当热裂解温度为500℃时,生物油产率最高,平均产率达到53.33%(质量百分比).反应温度越高,炭产量越低,不可冷凝气体产量越高,气体发热值越高;粒径＜1 mm的生物质其粒径对生物油产率影响不大;生物质进料速率增加时,生物油产率增加.本研究为生物能的利用提供了新的途径.     

Evaluation of the presence of drugs of abuse in tap waters

A total of seventy samples of drinking water were tested for non-controlled and illicit drugs. Of these, 43 were from Spanish cities, 15 from seven other European countries, three from Japan and nine from seven different Latin American countries. The most frequently detected compounds were caffeine, nicotine, cotinine, cocaine and its metabolite benzoylecgonine, methadone and its metabolite EDDP. The mean concentrations of non-controlled drugs were: for caffeine 50 and 19 ng L⁻¹, in Spanish and worldwide drinking water respectively and for nicotine 13 and 19 ng L⁻¹. Illicit drugs were sparsely present and usually at ultratrace level (<1 ng L⁻¹). For example, cocaine has mean values of 0.4 (Spain) and 0.3 ng L⁻¹ (worldwide), whereas for benzoylecgonine, these mean values were 0.4 and 1.8 ng L⁻¹, respectively. Higher concentrations of benzoylecgonine were found in Latin American samples (up to 15 ng L⁻¹). No opiates were identified in any sample but the presence of methadone and EDDP was frequently detected. Total mean values for EDDP were 0.4 ng L⁻¹ (Spain) and 0.3 ng L⁻¹ (worldwide). Very few samples tested positive for amphetamines, in line with the reactivity of chlorine with these compounds. No cannabinoids, LSD, ketamine, fentanyl and PCP were detected.     

Visualisation of the complexity of EUSES

The interdependencies of parameters applied in the models of EUSES are visualised in a directed connectivity graph. The parameters (inputs, defaults, state variables, outputs) are represented by boxes (nodes) and their relations by lines (edges). The visualisation, on the one hand, clarifies the complexity of the models in EUSES and, on the other hand, creates an overview and transparency. The parameters’ relations to each other can be recognised faster, and the models can be better understood. The complexity was quantified by the number (variety), kind (substance parameter, physico-chemical parameter, concentration, other parameters), and depth (dimension) of the parameter and the number of relations (connectivity). The variety of EUSES (without the modelsSimple Treat andSimple Box whose interior structure is not documented and without the effect and risk characterisation) amounts to 466, the connectivity to 961, and the maximal dimension is 21.