碳酸钙鼓式过滤机试车小结

总结了碳酸钙鼓式过滤机在生产能力、洗涤效果等方面的情况,并与原带式过滤机作了比较。     

混烧立窑的工艺探讨

主要论述石灰机械立窑从不良运作到平稳高效运行的过程,通过原材料规格选定,调控燃料配比、煅烧带位置、鼓风量等工艺参数,利用尾气成分、顶压顶温的分析实施反馈控制,达到司窑目的。实践证明,相比于国外先进石灰窑,混料式机械立窑具有造价低、经济性好等优点。     

Φ1000mm甲醇合成塔缠绕钢带的预拉应力分析

介绍Φ１０００ｍｍ甲醇合成塔绕带式容器预拉应力的控制和绕带的产品质量。     

Influence of geometry and solids concentration on the hydrodynamics and mass transfer of a rectangular airlift reactor for marine sediment and soil bioremediation

Hydrodynamics and mass transfer characteristics of a three-phase airlift reactor were studied in a rectangular split-vessel reactor and using an air-seawater-marine sediment system. Experiments were conducted over a range of downcomer to riser cross-sectional area ratios (A_D/A_R = 0.65 to 1.0) for two-phase systems and for five sediment concentrations (5 to 25% w/v) using marine sediments. The influence of higher sediment concentrations (30 to 50% w/v) was examined for A_D/A_R = 1. The presence of fine sediment particles in the system had little effect on hydrodynamic and mass transfer parameters compared to the two-phase systems up to 25% loading, decreasing at higher loadings. The airlift reactor was found to meet the dissolved oxygen demand needed for a contaminated sediment treatment process. Axial distribution of the particles was uniform along the riser and the downcomer. Correlations were developed that described the hydrodynamic and mass transfer behaviour for all experimental conditions examined.     

Mass transfer between a liquid and an array of discs in a cylindrical container. Part I: Pumped flow or rotation alone

This paper deals with average mass transfer between a liquid and both sides of discs arranged as baffles in a cylindrical container. The case of pumped flow alone through the stationary arrangement is first considered; the radial flow between the pairs of stationary discs is divergent and convergent successively. In other experiments, there is no pumped flow, but the discs are rotated between the stationary annular discs. The mass transfer coefficients are measured electrochemically for different geometrical and hydrodynamic conditions and the results are empirically correlated. The behaviour of corresponding surfaces involving a convergent or a divergent radial flow is discussed.     

Electrochemical reduction of chromate ions from dilute artificial solutions in a GBC-reactor

Reduction of chromate in very low concentration (20 ppm) has been carried out in a GBC reactor. Final concentrations below 0.5 ppm have been achieved at reasonable reaction rates. Spontaneous reduction of chromate by hydrogen in a GBC reactor without an external power source requires careful selection of cathode material. Chemically stable materials such as titanium and RVC tend to passivate when in contact with chromate solution and are unsuitable for use as cathode materials. Graphite, active carbon and graphite felt show no obvious passivation. Reduction of oxidized groups and oxygen are the major side reactions. These occur significantly, especially when using an activated carbon bed as a cathode.     

U.v. irradiation-induced crosslinking of solid poly(ethylene oxide) modified with tetraalkyl ammonium salt

Crosslinked poly(ethylene oxide) (PEO) modified with a quaternary tetraalkyl ammonium salt, ethyl methacrylate dimethyldodecylammonium bromide, was prepared by exposure of the solid blend to ultraviolet radiation from a high-pressure 150 W mercury lamp. The photochemical crosslinking of the blends proceeded in the presence of benzophenone as a hydrogen-abstracting agent. Gel fraction yield exceeded 85%, equilibrium swelling in water varied from 3.0 to 5.0, and the equilibrium swelling in chloroform from 6.5 to 12.5. The networks obtained have been characterized by elemental analysis, i.r.,¹H n.m.r., and d.s.c. measurements and their microstructure, water absorption and equilibrium swelling have been discussed.     

新型管道爬行器的研究与应用

论述一种依托于铁磁性管道为次级的新型管道爬行器的结构、工作原理 ,为管道检测、故障排除提供体积小、动力足、安全可靠的全新驱动方式 ,在解决管道爬行中的笨重复杂问题方面 ,较老式旋转电动机具有较强的优越性。     

Bleaching and photodegradation of textile dyes by H2O2 and solar or ultraviolet radiation

The photooxidation of textile dyes Yellow Procion H-4R, Bright Blue Remazol (blue reagent-19), Red Procion H-E7B, and the mixture of the two last dyes were investigated. The efficiency of photooxidation were compared using hydrogen peroxide (30%) as a bleaching reagent, solar and ultraviolet radiation, common glass borosilicate, quartz assay tubes, and no solid catalysts. The colour of blue dye and a mixture of blue and red dyes were almost completely removed after 3 h, either by solar or ultraviolet radiation. The best results of colour removal (93%) for the red and yellow dyestuffs were obtained only after 6 h, using quartz tubes, hydrogen peroxide and ultraviolet radiation. Using non-parametrical statistical tests (χ²), the treatment showed significant differences among the processes investigated (P<0.01).     

页岩气在贵州省开发利用的现状及难题

为了研究贵州省页岩气的储量分布及开发利用的现状,根据国土资源部公布的《全国页岩气资源潜力评价》,贵州省地质调查院的《贵州省黔南地区页岩气资源调查评价》,以及贵州省能源局等部门的相关资料统计,简要分析了黔北和黔南地区的页岩气资源储量分布情况,调查资料显示:目前贵州省页岩气地质资源量为13.54万亿m~3,可采资源量约1.95万亿m~3。重点探讨了贵州省各地区页岩气资源的勘探与利用现状,主要集中在绥阳、凤冈和岑巩等页岩气富集区块进行勘探,并针对页岩气资源勘探广而不精、缺乏专业人才与设备、商业利用价值的提升等问题进行了综合评述。