某赖氨酸废水处理工程的设计与调试

采用SBR工艺处理赖氨酸废水,原水COD浓度2000mg.L左右、氨氮浓度300mg/L左右时,经本工艺处理后出水COD浓度小于100mg/L,氨氮浓度小于15mg/L,达到国家排放标准.     

华尔公司污水治理工程

根据国家环保局、省市环保局的要求,2000年治理单位要完成“一控双达标”的任务.华尔公司作为市重点治理单位之一,按照现代企业清洁生产的基本原则,为实现企业可持续发展的战略目标,建设了一套废水治理工程. 　　1工厂废水排放情况 　　工厂废水排放来自3个车间:一车间1#排放口,废水量1 160 m3/d,其中COD296.20 mg/L,pH值高于9,SS含量大于200 mg/L,含油小于10 mg/L;二车间及一车间盐水工段2#排放口,废水量1 600 m3/d,其中COD 394.20 mg/L,pH值小于6,SS含量小于200 mg/L,含油小于10 mg/L;三车间、八车间及其它的3#排放口,废水量为1 500 m3/d,其中COD2 205.46 mg/L,pH值为6～9,SS含量小于200 mg/L,含油小于10mg/L.……     

悬浮污泥过滤工艺在油田污水深度处理中的应用

对大庆油田石英砂过滤器结构进行改造,并应用悬浮污泥过滤技术对油田污水进行了深度处理,试验取得了良好的处理效果.改造后的石英砂过滤器在进水悬浮物质量浓度为40～63 mg/L时,出水悬浮物质量浓度小于10 mg/L,平均去除率为81.8%,比改造前提高了33.3%;在进水油质量浓度为79～119 mg/L时,出水油质量浓度小于10 mg/L,平均去除率为92.9%,比改造前提高了21.2%.通过悬浮污泥过滤工艺处理后,出水悬浮物质量浓度小于2 mg/L,出水油质量浓度小于3 mg/L,滤出水悬浮物去除率达到96.4%,油去除率达到97.0%,水质均达到油田回注水标准.     

糖苷化改性醇醚的制备及其性能研究

采用蒸馏法对脂肪醇聚氧乙烯醚(AEO3)进行预处理,得到不含C12~14醇的醇醚——AEO4.7、AEO6,分别和无水葡萄糖以不同摩尔比混合后,在催化剂作用下进行直接糖苷化反应,得到糖苷化改性醇醚(MEG)。测定产物的物化性能,结果表明:MEG的cmc约为8 mg/L~14 mg/L,γcmc最低可达到27.47 mN/m(MEG4741);及时泡沫体积可达到110 mL(MEG6031);浊点比相应醇醚有所提高,最高可提高10.5℃;润湿时间最低为4.87 s;对液体石蜡的乳化时间最长为10.56 min。     

加工劣质燃料油电脱盐工艺研究

为了解决加工劣质燃料油时电脱盐脱后原料含盐量含水量不合格问题,对三级电脱盐工艺进行研究分析。通过优化工艺流程和工艺参数,使得脱后原料油含盐量小于3 mg/L、含水量小于0. 5%,电脱盐排水含油量小于50 mg/L。     

含氨氮废水生物处理研究

利用培养的硝化细菌处理含氨废水,当氨氮含量为1500 mg/L时,连续试验装置水力停留时间14 h出水氨氮即可低于10mg/L,氨氮去除率达95%以上;培养的硝化菌可以耐受COD含量140 mg/L的炼油废水并保持较高脱氨氮活性,氨氮含量120 mg/L左右的炼油废水经处理后,出水氨氮小于10 mg/L.     

腈纶污水预处理设计

二步法腈纶生产,污水的CODCr、低聚物、丙烯腈、硫氰酸钠等含量较高,采用微电解、生物滤塔、生物接触氧化等工艺处理,可使出水CODCr小于750mg/L,丙烯腈小于5mg/L,硫氰酸钠小于35mg/L,pH=6～9,符合后续生化处理的进水要求。     

水解-好氧法处理PVC塑料改性剂生产废水

采用水解-好氧法处理塑料助剂甲基丙烯酸甲酯-丁二烯-苯乙烯共聚物生产废水,在进水CODCr,BOD5,石油类分别为1540mg/L,495mg/L,38mg/L时,出水的CODCr,BOD5分别为88mg/L,12mg/L,石油类小于0.05mg/L。     

高尚堡油田注入水水质标准实验研究

以高尚堡油田沙三储层为研究对象,应用室内岩心模拟实验研究了注入水中悬浮固体含量、粒径、含油量和硫酸盐还原菌对储层的伤害,研究结果表明,注入水中的悬浮物、含油、细菌均会对油层产生伤害,建议高尚堡油田注水控制指标为悬浮固相含量小于3mg/L,粒径小于2.5μm,含油小于6 mg/L,硫酸盐还原菌小于25个/mL.     

稠油污水膜法资源化预处理技术研究

为解决稠油污水膜法资源化的预处理问题,采用气浮和生物接触氧化除油、砂滤除悬浮物和超滤去除大分子污染物的工艺作为反渗透的预处理工艺。结果表明,气浮可有效去除悬浮油,保证生化进水含油量小于20 mg/L;生物接触氧化可以将含油量降到1 mg/L以下,COD稳定在100 mg/L以下;砂滤的最佳过滤压力为0.6 MPa,砂滤出水的悬浮物小于5 mg/L;超滤的运行压力为0.3 MPa,超滤出水SDI小于3,浊度小于0.2 NTU。     

一方圆玺 一朝国事

一方圆玺,不知见证了多少的历史风云!     

千碉之国·丹巴

丹巴县是四川省甘孜州的东大门.被誉为"深藏在横断山脉中的世外桃源",是嘉绒藏族风情文化的中心,属岷山、邛崃山区,是川西高山峡谷的一部分.文化底蕴厚重,民俗风情浓郁,区内遍布的古碉是藏族先民的建筑艺术杰作,具有悠久灿烂的历史.     

A SIMULATION OF A MOTIONLESS MIXER

Continuous laminar mixing in segmented twisted-tape motionless mixers is considered. A solution to the steady isothermal creeping flow of a Newtonian fluid in a twisted-tape mixer has been obtained via two-dimensional numerical procedures. The developed flow within a section of the mixer has been solved in a helical coordinate system by an iterative scheme. The resulting solution is rigorously correct in the absence of entrance and exit flows at the junction between sections. An algorithm is presented for the modelling of these junction flows via two-dimensional procedures. Simulated cross-sectional mixing patterns have been generated for comparison with experimental results

The performance of twisted-tape mixers is simulated for various designs, beginning with the particular geometry of the Kcnics Static Mixer, and for different operating conditions Results suggest that the rate of mixing as a function of the total twist per section is optimized with respect to pressure drop when sections contain 80 degrees of twist. The capability for rational improvement in other design and operating parameters is illustrated. The mechanisms of laminar mixing are discussed and quantified; of primary importance is the tendency for interfacial area to assume an orientation within each section which is favorable to mixing in subsequent sections.     

A MATHEMATICAL ANALYSIS OF A MEMBRANE BIOREACTOR CONTAINING A SLUDGE DISINTEGRATION SYSTEM

The activated sludge process is widely used to treat domestic and industrial wastewater. A significant drawback of this process is the production of “sludge”, the disposal of which can comprise a significant proportion of the total operating costs of a wastewater treatment plant. We analyze the steady-state operation of a membrane bioreactor system (MBR) incorporating a sludge disintegration unit (SDU) to reduce sludge production. We provide a qualitative understanding of the model by finding analytically the steady-state solutions of the model and determining its stability as a function of the residence time. In practice a target value of the mixed liquor suspended solids (MLSS) content within the membrane reactor is specified. Applying the mathematical technique of singularity theory we show that if the sludge disintegration factor is sufficiently high then the MLSS content is guaranteed to be below the target value. This model prediction, of key interest from a practical perspective, was not identified in the original investigation of this model, which relied upon numerical integration of the governing equations.     

一起制氮设备的故障分析

在浮法玻璃生产过程中,氮气流量保持恒定,是保持锡槽工况稳定的重要条件,是生产优质浮法玻璃的重要前提条件之一.只有制氮设备的稳定运行,才能保证氮气供应.本文就制氮空压机运行中出现的故障现象、原因进行了分析,并提出了改进措施.     

一种新型传动结构的斜坡辊道

浮法玻璃厂联合车间受工艺限制,往往将2楼熔制成形车间和1楼包装车间用斜坡辊道连接起来。而2楼与斜坡之间衔接的凸弧辊道、1楼与斜坡之间衔接的凹弧辊道,其结构形式往往成为设计及安装调试的难点。传统的弧段结构采用锥齿轮箱和同步带传动结构,与当前主流的通轴弧齿锥齿轮结构相比较为落后。本文对浮法玻璃车间斜坡辊道结构进行详细阐述,并提出了一种新的凸、凹弧辊道的传动结构。     

A MATHEMATICAL MODEL FOR A YANKEE HOOD

Drying of thin paper sheet on a Yankee cylinder equipped with a steam heated high velocity hood is examined. When possible infiltration of air from the surroundings is considered, then the process is fully determined by twelve variables. One of these can be chosen as an independent variable. An equation group of eleven equations is derived. The method of solution is iterative. Finally, a numerical demonstration example is presented.