生活垃圾焚烧发电厂设计新思路探讨

以兴义市生活垃圾焚烧发电厂工程为例,介绍了该项目设计的主要内容;总结了项目设计中节省投资和改善环境的新思路,以助于推进生活垃圾焚烧处理技术的应用。     

加热与酸化与芬顿试剂对乳化液处理效果的研究

乳化液废水含有大量表面活性剂,化学性质稳定,给处理带来很大难度。为解决乳化液处理困难的问题,我们以某电子制造商产生的乳化液废水为研究对象,采取加热酸化-Fenton氧化开展处理研究,意在解决实际工程中乳化液废水处理困难的问题,同时为乳化液废水处理在技术上提供新的思路。在加热酸化-Fenton氧化处理中,由于乳化液稳定性极好,传统酸化破乳效果不理想,将加热用于酸化破乳,油水分离效果明显,在加酸量1.0 mL 98%H2SO4/100mL乳化液、加热温度95℃、加热时间1h条件下,加热酸化破乳使初始COD20万mg/L,浊度8000 NTU的乳化液废水COD降到46592mg/L,浊度降到20 NTU以下,COD和浊度的去除率分别达90.7%和97.5%以上;由于破乳后的废水仍具有很高的COD浓度,因此采取Fenton氧化进一步处理,在ρFe2+/ρH2O2=1∶30、ρH2O2/ρCOD=1.4、初始pH=4的条件下,经处理后的出水COD可降到18600 mg/L,去除率达61.4%,其B/C可由破乳后的0.11提高到0.3,废水的可生化性大大提高,为后续进一步处理提供可能。     

Solid State Reactions of Potato Starch with Urea and Biuret

Reaction of granular potato starch with urea and biuret resulted in the formation of products, which were soluble neither in cold nor boiling water. The net reaction was a monosubstitution of the hydrogen atom in one hydroxyl group in each D-glucose unit of starch with the either CO–NH₂ or CO–NH–CO–NH₂ moiety, respectively. Properties of the products, particularly these with urea, depended on the mode of reaction. Reactions were carried out in the microwave oven as well as with convection heating. The products retained the granular form of starch but a vast majority of granules were damaged. -Amylolysis of those materials revealed that their susceptibility to the enzyme increasing in the order: starch-amylolysis with simultaneous insolubility in water make these products suitable as ruminant fodder and, eventually, biodegradable material.     

电缆表面粉尘自热行为数学模拟

建立了负载电缆表面粉尘自热过程的稳态传热数学模型,通过数值解讨论其自热行为。     

氧化铝吸附水中腐殖酸的研究

讨论了氧化铝对腐殖酸的吸附性能,以及吸附操作条件的影响。结果表明,500℃以上的热处理,可有效地提高氧化铝水合物对腐殖酸的吸附效果;中性偏酸的溶液和吸附质溶液中铝离子的存在,可明显提高腐殖酸的去除率;氧化铝对腐殖酸有较快的去除速度,在22.3mgTOC/l的浓度范围内,腐殖酸去除量与其浓度呈线性相关。     

实施集中供热 改善城区空气环境质量

近几年大、中城市的环境空气质量得到了较大改善，但随着县级城镇的发展扩大．其城区内由于采用燃煤锅炉分散供暖，烟尘、二氧化硫超标排放，造成城镇冬季空气污染严重。实行集中供热，取缔城区的小燃煤锅炉．是改善城区环境空气质量的根本途径。     

热水供暖系统中氧腐蚀的原因、危害及除氧措施

文中分析了热水供暖系统中的氧腐蚀机理,指出了氧腐蚀的危害性,介绍了热水供暖系统中的几种除氧方式.     

平顶山市郊被动式太阳房单一系统可行性分析

本文主要分析了太阳能供热单一系统的经济效益参数和偿还年限，并结合实例进行推导、计算，论证在平顶山市郊推广单一系统的可行性。     

δ-MnO2 decorated layered double oxides in-situ grown on nickel foam towards electrothermal catalysis of n-heptane

Energy-saving and efficient monolithic catalysts are hotspots of catalytic purification of industrial gaseous pollutants. Here, we have developed an electrothermal catalytic mode, in which the ignition temperature required for the reaction is provided by Joule heat generated when the current flows through the catalyst. In this paper, Mn/NiAl/NF, Mn/NiFe/NF and Mn/NF metal-based monolithic catalysts were prepared using nickel foam (NF) as the carrier for thermal and electrothermal catalysis of n-heptane. The results indicated that Mn-based monolithic catalysts exhibit high activity in thermal and electrothermal catalysis. Mn/NiFe/NF achieve conversion of n-heptane more than 99% in electrothermal catalysis under a direct-current (DC) power of 6 W, and energy-saving is 54% compared with thermal catalysis. In addition, the results indicated that the introduction of NiAl (or NiFe) greatly enhanced the catalytic activity of Mn/NF, which attributed to the higher specific surface area, Mn³⁺/Mn⁴⁺, Ni³⁺/Ni²⁺, adsorbed oxygen species (O_ads)/lattice oxygen species (O_latt), redox performance of the catalyst. Electrothermal catalytic activity was significantly higher than thermal catalytic activity before complete conversion, which may be related to electronic effects. Besides, Mn/NiFe/NF has good cyclic and long-term stability in electrothermal catalysis. This paper provided a theoretical basis for applying electrothermal catalysis in the field of VOCs elimination.