氯碱法处理低浓度含氰废水

氯碱法是用次氯酸钠与氰根进行氧化反应,反应分为两步进行,首先在一定PH值条件下,游离氰根和聚合氰根被氧化为氰酸盐,通过调整PH值,氰酸盐进一步被氧化为氮气,二氧化碳、氯化钠等无毒无害物质,以达到治理低浓度含氰废水的目的。本文主要就氯碱法处理低浓度含氰废水工艺进行介绍,扼要阐述了设计与计算方法。通过某煤气化工程含氰废水处理的应用实践,氯碱法处理低浓度含氰废水对于游离氰根和聚合氰根的去除效果明显,可普遍应用于低浓度含氰废水的治理。     

废纸再生加工厂污水处理工程的设计

应用气浮和生物接触氧化相结合工艺,处理榆次废纸再生加工厂造纸废水,处理规模300 m3/d.工程设计考虑了对原有设施的利用.预处理采用气浮法去除造纸废水中大部分的悬浮物,生物处理单元采用生物接触氧化法,生物处理后的废水过滤后回用于造纸制浆车间,投入运行后效果良好.     

《汞阴极法》和《隔膜法》电解食盐水的简易演示实验

一、《汞阴极法》电解食盐水的简易摸拟实验汞阴极法和隔膜法一样,是氯碱工业电解食盐水制取烧碱、氯气和氢气的重要方法。虽然汞阴极法存在污染严重的缺点,但此方法制得的碱液浓度很高(含NaOH可达到45～50%,比隔膜法高3～5倍),碱液中不含NaCl(可直接用于化学纤维工业)以及制得的Cl_2较纯(可     

硫酸法生产钛白粉的废水治理措施研究

硫酸法生产钛白粉过程中的度水含有较多的酸性物质,行业内一般采取由石灰石制作成的Ca(OH)_2乳浊液中和处置。氯碱行业生产产生的废料电石渣中含有大量的氢氧化钙,理论意义上可以作为硫酸法钛白粉废水治理的药剂,替代石灰使用。该文通过具体的实验从废水处理效果、经济性对比等方面分析电石渣中和处理硫酸法废水的可行性。     

焦化废水深度处理技术研究进展

焦化废水回用于循环冷却水,实现水资源的再利用及焦化废水的零排放,是环境保护和能源节约的要求.综述了焦化废水的来源、特性、深度处理的方法,并对各种方法的优缺点进行了分析.通过焦化废水深度处理技术,解决焦化废水只能用于干熄焦工艺而不能作为循环废水再利用的难题,其社会效益十分显著.     

深度处理后针织废水的回用实验研究

以广东佛山联达纺织实业有限公司经深度处理后的废水为对象,以该企业实际生产用水做参比,通过实验分别考察深度处理后的针织废水对生产过程中所使用的主要化工原料的影响以及对针织漂染加工各工序织物的影响.实验结果表明:回用水用于生产后,对染料、表面活性剂、生物酶等主要化工原料均无影响,织物在煮练、染色、剥色中强力变化较小,色差、色牢度符合回用要求.     

APAM、CPAM、PAC处理印染废水及废水回用于涤氨混纺织物染色的研究

采用APAM、CPAM、PAC及其组合处理印染废水,比较了其对废水絮凝效果、脱色效果、COD去除效果、沉淀分离效果的影响,处理后的废水回用于涤氨混纺织物染色,对染色后织物的L*、a*、b*、c*和K/S值进行测试分析.结果表明,采用APAM+PAC+CPAM组合及顺序加料用于印染废水处理的效果最佳,处理后废水可用于涤氨织物染色.     

某氯碱化工集团PVC糊树脂厂水网络优化

文章以安徽某氯碱化工集团PVC糊树脂厂为研究对象,探索工业水网络的优化设计;在分析该厂用水现状的基础上,采用数学规划法,建立了废水回用网络优化模型;利用GAMS通用软件优化计算,得到了经优化的用水网络和最小新鲜水耗用量,并通过水网络结构的调整,提出了最终水回用方案.     

双电位阶跃计时电流法测定医疗废水中余氯的含量

采用双电位阶跃计时电流法研究了医疗废水中余氯的含量,优化了实验条件,实验发现在HAc浓度为0.25mg/L的条件下,阶跃电流大小与ClO-的浓度在2.50～12.5 mg/L范围内呈良好的线性关系,据此建立了用双电位阶跃计时电流法测定医疗废水中余氯含量的新方法,该方法灵敏度高,检出限为0.56 mg/L.该方法用于医疗废水中余氯含量的测定,结果满意.     

化学与物理相结合处理一次缩合洗水

布洛芬产品缩合工序产生一次缩舍洗水，其中第一遍洗水目前由相关方处理，第二遍洗水进入高浓废水，由污水处理厂处理。通过实验，将第二次洗水收集，代替自来水用于第一次洗涤；利用化学处理和物理处理相结合的方法，将第一次洗水中的硫酸转化为硫酸钠，防止了硫酸破坏新戊二醇；利用相似相溶原理，利用工业乙醇溶解新戊二醇而与硫酸钠固液分离，成功将新戊二醇纯化后回用于缩合反应，既提高了新戊二醇原料的利用率，又减少了污染物的排放。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…