臭氧-BAF工艺在印染废水深度处理的研究

印染废水具有水量大、水质变化大、碱性大、高色度、有机物含量高且生化性较差等特点,属于难处理的工业废水。采用臭氧-曝气生物滤池(BAF)工艺对某印染厂二级生化处理出水进行了深度处理实验研究,结果表明,在进水COD≤150mg/L,色度≤50倍的条件下,当臭氧投加量为15～20mg/L、BAF停留时间为6h,气水比为6:1,处理出水COD≤45mg/L,色度≤5倍,水质满足要求。     

BAF-O_3组合工艺深度处理炼化含盐污水工业应用

臭氧催化氧化与曝气生物滤池的联合工艺可用于炼油厂含盐污水的深度处理。惠州炼化分公司采用BAF-O3组合工艺对含盐二级生化出水进行深度处理改造。运行结果表明,在进水COD浓度平均值97.9mg/L,臭氧催化氧化池和臭氧接触氧化塔的臭氧投加量分别为80~90 mg/L、30~20 mg/L的条件下,装置总出水COD浓度均值为43.5 mg/L,满足污水COD≤50 mg/L的限值要求,COD总去除率达到55.57%。BAF单元前置后,其COD去除率提高,COD去除量由2.71 mg/L提高至9.5 mg/L,经分析主要系生物絮凝作用;由于活性炭罐和BAF单元对悬浮物的有效过滤,有利于保护后续的臭氧催化氧化单元。     

催化氧化耦合高效生化工艺深度处理石化废水

采用臭氧催化氧化耦合特定菌高效生化工艺(HENT)对某企业石化废水二级生化出水进行深度处理,主要去除COD和氨氮。废水经该工艺处理后,出水水质稳定,COD<120 mg/L,去除率平均为78%;出水氨氮<1 mg/L,去除率接近100%。试验结果表明,臭氧催化氧化耦合高效生化工艺可满足石化废水二级生化出水的深度处理要求。     

聚糖反应-A2/O-臭氧催化氧化处理聚氨酯废水的研究

针对江西某聚氨酯公司生产废水甲醛含量高,COD和氨氮浓度高,以及可生化性差的特点,设计采用"预处理-生化反应-深度处理"的组合工艺对其进行处理。其中,预处理通过聚糖反应去除废水中的甲醛,并提高废水的可生化性;生化反应采用A~2/O工艺,主要去除废水中的COD和氨氮;生化处理出水采用臭氧催化氧化进行深度处理。工程实际运行结果表明,最终处理出水甲醛≤5 mg/L,COD≤500 mg/L,氨氮≤45 mg/L,出水水质达到园区接管标准。     

臭氧-曝气生物滤池工艺深度处理石化废水

采用臭氧-曝气生物滤池(BAF)工艺对广东某石化废水经一般生化处理后进行深度处理,以提高废水的可生化性,探讨了废水的初始pH、臭氧投加量和催化剂等因素对臭氧氧化的影响,以及曝气生物滤池不同停留时间对废水COD去除率的影响。结果表明,进水COD约60~80 mg/L,臭氧投加量55.56 mg/L,BAF水力停留时间1.5 h,经组合工艺处理后出水COD低于30 mg/L,达到中水回用标准。     

一体化O_3-BAF深度处理生物柴油废水

采用一体化臭氧曝气生物滤池(O_3-BAF)工艺对二级生化处理后的石化废水进行深度处理,进水COD为100~120 mg/L,气水比为3∶1~4∶1,臭氧投加量为15~25 mg/L,处理后出水COD50 mg/L,氨氮5 mg/L,各项出水水质指标均能达到《辽宁省废水综合排放标准》(DB 21/1627—2008)一级标准。     

O_3-BAF处理己内酰胺生产废水的工艺探讨

针对己内酰胺生产废水处理难度大的现状,提出采用臭氧(O_3)-曝气生物滤池(BAF)组合工艺对己内酰胺生产废水进行深度处理,研究了O_3段与BAF段前、后设置对生产废水化学耗氧量(COD)去除率的影响,以及BAF段后置运行对生化耗氧量(BOD5)/COD的影响。结果表明:BAF段后置时,生产废水COD去除率达52.4%,处理后的出水COD约为60 mg/L,达到一级排放标准,但后续生化处理BAF段的COD去除率较低,为9.1%;BAF段后置时,出水BOD5/COD从0.1左右提高到0.2以上;BAF段前置时,生产废水COD去除率达到72.4%,处理后的出水COD约为52.8 mg/L,BAF段主要起过滤悬浮物的作用。     

臭氧氧化-生物滤池处理某石化废水能效研究

根据四川某石化二级反渗透出水的水质水量特点,采用臭氧氧化-生物滤池对石化浓水进行了处理。考察了臭氧投加量、pH对臭氧氧化效果的影响,确定了臭氧单元最佳臭氧投加量和pH值。结果显示:臭氧投加量在12 mg/L、pH为8~9时,COD进水指标从175 mg/L降低至47.5 mg/L以下,去除率达到约72.8%,氨氮值从17 mg/L降低至4.75 mg/L以下。石化污水处理后的COD、氨氮、总氮等指标达到了《国家污水综合排放标准》(GB8978-1996)中直接排放的水污染物最高允许排放浓度要求。     

一体化O_3-BAF深度处理生物柴油废水

采用一体化臭氧曝气生物滤池(O_3-BAF)工艺对二级生化处理后的石化废水进行深度处理,进水COD为100¹20 mg/L,气水比为3∶1120 mg/L,气水比为3∶1⁴∶1,臭氧投加量为154∶1,臭氧投加量为15²5 mg/L,处理后出水COD<50 mg/L,氨氮<5 mg/L,各项出水水质指标均能达到《辽宁省废水综合排放标准》(DB 21/1627—2008)一级标准。     

焦化废水处理工程实例分析

焦化废水属于典型的高氨氮难降解有毒有害工业废水,其对传统生物处理工艺和深度处理工艺都提出了很高的挑战。以某焦化废水处理站为实例,介绍了焦化废水的水质特点、工艺流程、构筑物参数和设备选型,分析了运行效果、出水水质以及运营成本。工程实际运行效果表明,采用预处理-两级A/O-磁混凝沉淀-多相催化臭氧氧化的工艺路线对焦化废水进行处理,废水COD、氨氮和总氮的去除率分别为98.4%、98.6%和88.5%,出水的COD≤80mg/L,氨氮≤10 mg/L,总氮≤20 mg/L,达到或优于《炼焦化学工业污染物排放标准》（GB 16171—2012）的新建企业直接排放标准。磁混凝沉淀+多相催化臭氧氧化的深度处理组合工艺有效提高了生化出水中难降解有机物的去除效果,对同行业的废水处理具有一定的参考价值。     

底座连接口特征参数对显示器后壳注塑质量的影响分析

在Moldflow分析软件的基础上,对显示器后壳进行仿真研究,以翘曲变形量为质量指标,结合控制变量法进行单因素变动实验,保持注射工艺参数不变,研究显示器后壳底座连接口对制品翘曲变形的影响.对数据进行图表分析,结果表明显示器后壳尺寸定位68.58 cm(27英寸)时,底座连接口选用圆形,连接口位置距离底边26 mm,尺寸...     

The role of the symmetry and the flexibility of the anion on the characteristics of the nanostructures and the viscosities of ionic liquids☆

The transport properties of ionic liquids (ILs) are crucial properties in view of their applications in electrochem-ical devices. One of the most important advantages of ILs is that their chemical–physical properties and conse-quently their bulk performances can be well tuned by optimizing the chemical structures of their ions. This will require elucidating the structural features of the ions that fundamentally determine the characteristics of the nanostructures and the viscosities of ILs. Here we showed for the first time that the“rigidity”, the order, and the compactness of the three-dimensional ionic networks generated by the anions and the cation head groups determine the formation and the sizes of the nanostructures in the apolar domains of ILs. We also found that the properties of ionic networks are governed by the conformational flexibility and the symmetry of the anion and/or the cation head group. The thermal stability of the nanostructures of ILs was shown to be con-trolled by the sensitivity of the conformational equilibrium of the anion to the change of temperature. We showed that the viscosity of ILs is strongly related to the symmetry and the flexibility of the constitute ions rather than to the size of the nanostructures of ILs. Therefore, the characteristics of the nanostructures and the viscosities of ILs, especially the thermal stability of the nanostructures, can be fine-tuned by tailoring the symmetry and the conformational flexibility of the anion.     

浅谈设备的性能与操作对胎面压出质量的影响

简要介绍了胎面压出的工作原理及工艺过程，对设备的配置及操作对胎面压出质量的影响进行了分析，并对压出过程中常见的质量缺陷、造成的原因以及解决措施提出了自己的见解。     

Investigation of the effects of fatty acids on the compressive strength of the concrete and the grindability of the cement

In cement industry, a great energy consumption has been observed during grinding of clinker. To reduce this consumption, some waste products have been used as grinding aids.In this investigation, the effects of sunflower oil (SO), oleic acid (OA), stearic acid (SA), myristic acid (MA) and lauric acid (LA) on the fineness and strength of the cement have been examined. These aids were added into clinker in certain ratios based on the cement clinker weight and the grinding has been done for a definite time at the same condition.All of the fatty acids used increased the fineness as compared with the cement without the grinding additives. SO and OA decreased the strength significantly, LA decreased it to a lesser extent and SA increased it definitely according to the common cement. But MA did not alter the strength of the cement as much as SA. In addition, the covering of the balls influences the grinding of cement clinker unfavourably.     

煤粉流动性对GSP气化炉气力输送的影响研究

针对GSP气化装置煤粉气力输送在试车阶段出现的煤粉锁斗下料不畅、发料罐输送性能不佳等问题,从原料煤性质和工业装置的改进方面出发,通过煤粉的流动性参数的测量与研究,分析出现上述工程问题可能的内在原因,并提出工业装置改进方法,为保证GSP煤粉气力输送工业装置的正常运行提供解决办法。     

关于建立火炸药安全数据库的探讨

由反映火炸药及其制品的危险性能和用于对它们的生产、储运系统进行安全评价数学模型出发,探讨了如何建立一个全面、实用的火炸药安全评估数据库。通过对此数据库内容、数据表示方法、数据搜索方法以及建立步骤的讨论,明确了该数据库的使用对象和主要功能。     

The effect of the length of the oxyethylene chain on the conductivity of the polyurethaneurea electrolyte

Polyurethaneureas (PUU), which were synthesized from 4,4′-diphenylmethane diisocyanate (MDI), poly(ethylene glycol) (PEG), and 3,5-diaminobanzoic acid (DABA), were used as polyelectrolytes in this study. Differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FT-IR) were used to monitor the effect of the various kinds of PEG on the changes in morphology of PUU electrolytes corresponding to the concentration of lithium perchlorate (LiClO₄) dopants. The results of DSC and FT-IR indicate the Li⁺ ions coordinate with the soft and hard segments. Additionally, the crystallinity of the PEG soft segment and the ordered hydrogen-bonded urea carbonyl groups decreased with increasing salt concentration. Impedance spectroscopy (IS) measurements show that the PUU electrolyte with the high phase separation degree has the high ionic conductivity. The hard-segment T_g and the soft-segment T_m influence the conductivity behavior of polyelectrolytes with increasing measurement temperature.     

转子挤压组合凹模的应力分析

组合凹模的应力分析是一个非常复杂的问题，对其进行精确分析是解决模具寿命的关键。本文采用有限元分析软件Ansys对转子的组合凹模进行了分析，为转子组合凹模的优化设计提供了依据。     

Effect of the drafting force on the strength of the bottom of the spinneret

In spinning basalt fibres, the drafting force is in the same range as in spinning of glass fibres. The effect of the drafting force can not be considered in the calculation for the strength and rigidity of the bottom of the spinneret. __________ Translated from Khimicheskie Volokna, No. 5, pp. 47–50, September–October, 2007.