涤纶废水治理工程实例

介绍了涤纶废水治理以及回用的工程设计。详细分析了废水水质,污水治理工艺,主要构筑物和设计参数,以及污水治理工程运行成本。工程生化出水水质满足污水综合排放标准GB 8978-1996中的一级标准,反渗透出水满足城市污水再生利用工业用水水质GB/T 19923-2005水质标准。     

玉米深加工废水处理工程设计及运行效果

结合工程实际,介绍了采用UASB+CASS+混凝工艺处理玉米深加工废水处理的工程设计实例.运行结果表明,该工艺能够有效处理玉米加工废水,出水水质达到污水综合排放标准(GB8978-1996)一级标准的排放要求,出水水质稳定.     

厌氧-气浮-好氧工艺处理浓香型白酒厂污水工程实例

将厌氧-缺氧-好氧工艺(A2/O)处理白酒厂污水,改造为厌氧-气浮-好氧工艺(AF-ABR-气浮-CASS)。新工艺对COD、BOD5、SS的去除率分别是99.64%、99.58%、93.35%,处理后水质达到污水综合排放标准GB8978-1996一级排放标准。改造工程具有针对性强、水质水量适应范围广、运行稳定、剩余污泥量少等优点。     

包头市土右旗污水处理站废水处理工程实践

包头市土默特右旗污水处理站污水处理采用CAST工艺,介绍了该工程设计进出水水质指标、工艺流程、主要构筑物的工艺设计参数以及运行效果。分析了出水水质氨氮不达标的原因以及经济效益。通过添加反硝化菌,出水氨氮质量浓度由44 mg/L降到9.6 mg/L,达到城镇污水处理厂污染物排放标准(GB 18918-2002)中的一级B排放标准。     

大连开发区污水处理一厂升级改造工程

大连市开发区污水处理一厂原设计规模为7.5×104m3/d,处理工艺为A/O工艺,出水水质执行污水综合排放标准(GB 8978-1996)的二级标准。升级改造工程设计规模增至10×104m3/d,采用改良A2/O工艺,出水水质执行城镇污水处理厂污染物排放标准(GB18918-2002)的一级A标准。介绍了污水处理厂扩容改造的工艺方案选择、工艺流程、设计参数,目前该工程的部分构筑物已投入试运行,出水水质达到一级A标准。     

南头镇污水处理厂二期工程设计

南头镇污水处理厂二期工程是南头镇水污染减排重点工程,该工程设计规模为3.5×10~4 m~3/d。该工程采用改良A/A/O工艺作为污水处理主体工艺,详细介绍了处理工艺流程、主要构筑物的工艺参数及技术特点。该工程投产运行以来,出水水质稳定且达到《城镇污水处理厂污染物排放标准》(GB18918-2002)一级A标准,COD达《水污染物排放限值》(DB44/26-2001)第二时段一级标准。     

混凝沉淀-过滤工艺处理选矿废水的应用

针对某企业选矿废水的特性,采用混凝沉淀-过滤工艺对其进行处理。运行结果表明,整个废水处理系统稳定运行期间,COD和SS的去除率可达46.4%和97.8%,出水水质各项指标均达到污水综合排放标准(GB 8978-1996)中的一级排放标准。     

石化码头污水处理

介绍了广州石化码头污水处理设计工艺,指出了运行中存在的问题。针对现有水质、水量的特点,优化及简化了操作工艺。运行结果表明,采用隔油/生物接触氧化工艺可有效处理石油库区的污水,处理后的污水水质达到《污水综合排放标准》(GB8978-1996)一级标准,而且出水水质较稳定。     

酿造废水处理工程设计

某酿造废水处理工程设计规模为300 m3/d,采用氧化塘-生化组合工艺处理该废水,出水水质达到GB8978—1996《污水综合排放标准》中二级标准的要求。详细介绍了该废水处理工艺流程、构筑物设计参数及调试运行结果。     

水解酸化-接触氧化工艺处理稠油污水

稠油污水因油水密度差小、黏度高、成分复杂等,处理难度大,是目前油田污水处理中的难题.应用水解酸化-生物接触氧化工艺处理国内某油田稠油(油密度0.86～0.97 g/L)污水,实现了3 000 m3/d的稠水污水达标排放.工程运行-年的结果表明,该技术具有抗冲击能力强、污泥产生量少、处理效果稳定的优点,出水水质达到国家二级污水排放标准(GB 8978-1996),大部分水质指标达到国家一级污水排放标准要求.     

乙烯酮(双乙烯酮)下游产品废水的治理技术

乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。     

几种乙炔加压设备性能的比较

阐述并比较了几种加压设备在乙炔加压清净过程中的性能和特点。     

三种煤样燃烧热的测定

本文通过三个厂家提供的三种煤样燃烧热的测定,由测定结果综合得出3号煤样燃烧最完全、燃烧热也最大,是三个煤样中最好的一种。     

Semi-empirical equation of state of metals. Equation of state of aluminum

A semi-empirical equation of state for metals is described. Its capabilities are demonstrated by the example of the equation of state for aluminum. New experimental data are presented on the location of the isentrope of aluminum for unloading from the state at p = 229.71 GPa on the shock adiabat to an aerogel (SiO₂) of density 0.08 g/cm³. __________ Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 61–75, March–April, 2008.     

水泥水化热测定方法综述

水泥水化热是中、低热水泥和核电工程用水泥的一项关键的技术指标。全球范围内测定水泥水化热的方法有溶解法、直接法/半绝热法、等温传导量热法三种。本文总结了中、美、欧相关方法标准,对其测试原理、仪器设备、试验过程等方面进行了比对,并对其在领域的应用做了简单的概括。     

小议汽车涂装工艺设计对涂装成本的影响

论述了涂装工艺设计对涂装设备投资、涂装生产成本的影响。     

Calorimetric and Computational Study of Enthalpy of Formation of Diperoxide of Cyclohexanone

A thermochemical rather simple experimental technique is applied to determine the enthalpy of formation of Diperoxide of ciclohexanone. The study is complemented with suitable theoretical calculations at the semiempirical and ab initio levels. A particular satisfactory agreement between both ways is found for the ab initio calculation at the 6–311G basis This set level. Some possible extensions of the present procedure are pointed out.     

Measurement of the gradient of viscosity with composition of mixtures of non-ideal gases

A perturbation viscometer is a differential capillary viscometer that measures the logarithmic viscosity gradient of the viscosity-composition curve for gas mixtures. Measurements are made at different gas mixture compositions. Integration of the logarithmic viscosity gradients measured over the full composition range gives the mixture viscosity relative to the viscosity of one of the pure components of the gas mixture. This method is attractive because, for measurements of equal precision, integration of the gradients is potentially an order of magnitude more precise than measurement of the viscosities directly. It can also work at high and low temperatures and perhaps high pressures.The perturbation viscometer has been used to make measurements on ideal gas mixtures at ambient and elevated temperatures. The situation is more complicated when the gas mixtures are non-ideal. Extra effects due to density differences, molar volume change on mixing and differential thermal expansion may be measured in addition to the desired viscosity change producing systematic errors in the results. Thus, a more sophisticated apparatus is required. The standard perturbation viscometer has been modified to separate out the extra effects to permit measurement of the true change in viscosity. In addition, the theoretical operation of the modified apparatus has been revised to account for the design changes to permit calculation of the viscosity-composition profiles from the results.The apparatus has been tested using helium-HFC-125 mixtures and two new viscosity-composition profiles are presented for these mixtures at 23 and . Internal consistency tests have been used to confirm that the data produced are of high quality with an estimated uncertainty in the viscosity ratio data at of 0.9% and at of 1.5%.     

塔设备改造选型的分析

就当前扩产增容中塔设备设计和改造时板式塔和填料塔的选型问题加以分析。在评述目前国内常用的几种塔板和新型填料之后，着重介绍一种新型塔板（导向梯形浮阀塔板）和一种新型填料（波环填料——乾隆帕克）。     

Effect of degree of deacetylation of chitin on the properties of chitin crystallites

In the present article, chitin from crab shell was systematically deacetylated using a NaOH treatment with control of the reaction time. The degree of deacetylation, monitored using solid-state NMR, revealed that the reaction was pseudo-first order. Based on this, swollen and NaOH-saturated particles are proposed as the reaction system. The weight loss of the partially saponified and neutralized samples after HCl hydrolysis increased linearly with the degree of deacetylation. The crystallinity of the samples was found to increase after acid hydrolysis. According to conductimetric titration, the surface charge density of the crystallites, after acid hydrolysis, was found to increase with base treatment time. The effect of surface charge on the formation of a chiral nematic phase, due to the rodlike nature of the crystallites, was explored. These results show that because the contribution of charged particles to the ionic strength was significant the double layer compression was affected, especially since the surface charge density was close to the Manning limit. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 65:373–380, 1997