Advanced Materials Research Vols. 690-693

Abstract: The article deals with preliminary study of possible utilization of ozone oxidative capacity for eliminating the organic content of operationally exhausted MWFs. This research was focused on the treatment of 17 samples clean MWFs diluted concentrates (samples mostly from Castrol, Shell Macron GmbH, Fuchs Oil corp., Agip GmbH, Blaser Swisslube AG, Cimcool Industrial Products BV, Houghton, Exxon Mobile and Quaker) by ozone. The study is focused to the effect of high concentrations of ozone during 4 hours on the kinetics of total organic content using parameters such as COD and TOC. The concentration of the tested MWFs was set at 1% (v/v). Selected MWFs consisted of all types of water miscible – emulsions, semi-synthetic and synthetic fluids.

Abstract: Aimed at the issue of dissolved oxygen concentration insufficiency in regular constructed wetlands, shale hollow bricks are adopted to build self-aeration constructed wetlands, to increase the oxygen supply capacity in the system. The experimental result indicates that DO concentration in self-aeration constructed wetlands is 0.1mg/L higher than that in artificially intensified aeration wetlands, and the removal rate for COD reaches over 85%,which is about 2% higher than that of artificial aeration wetlands. This shows that the built self-aeration constructed wetland system can increase oxygen supply capacity in the wetland, and increase the purification efficiency of the wetland system for COD in wastewater.

Abstract: Titanium rough concentrate in Haibing contains ilmenite, rutile and other valuable minerals, and also radioactive mineral monazite. Ore minerals contain 42.08% of TiO₂ and 4.92% of ZrO_2. Radionuclide specific activities results shown that intensity of radioactivity of 226Ra, Th and 40K are 2142.2Bq/kg, 8964.2Bq/kg and 724.72Bq/kg respectively. Through integration process of shaking table-weak magnetic-dry high intensity magnetic-electric separation, qualified titanium concentrate, azurite concentrate and monazite were obtained, which recovers the voluble minerals at maximal extent.

Abstract: As a significant part in artificial wetland system, wetland substrate is an important hub for the transformation of organic pollutants to inorganic and innoxious substance. In this thesis, with shale and quadratic-regression orthogonal rotation combination design, the diameter and filing thickness of artificial wetland substrate were optimized, and the orthogonal regression model for the P-removal rate in sewage (Y), diameter (x₁) and thickness (x₂) was established for wetland substrate, namely Y=77.06250-4.69914X₁+3.43848X₂-2.31875X₁²+4.38125X₂²-2.25000X₁X_2, It can be deducted from this model that the best experiment condition is that, the diameter is 10.94mm, while the filling thickness is 100.45. Under such condition, it can be inferred that the P-removal rate can reach 93.07% according to the mathematic model. It is testified that the experiment results are similar to the model values.

Abstract: In order to achieve the purpose of pre-dusting device efficiency, low resistance, energy-saving after dense phase Semi-dry flue gas desulfurization system. In this paper, computer numerical simulation as the main research method, use single factor and orthogonal method, simulation study of the various factors that affect the performance of the octagon separator, get the law of different factors for separator performance. And designing a separator structure model, use this model as a sintering plant dense phase pre-dusting device after the semi-dry flue gas desulfurization system, get the separation efficiency of 37.6% , obtain the desired effect of better engineering.

Abstract: In this paper, the effect of residual chlorine of hypochlorite (H) on high yield pulping with H₂O₂/CoSO₄ of wet stored bagasse was studied. Compared with control sample, the pulp of the bagasse wetstored with H or Ho (without residual chlorine) bleaching waste water had better pulping yield and strength, but the pulp optical property was lost seriously. If it had no requirement on the brightness, the wet storage with H or Ho bleaching waste water was a good method to improve the pulp strength and save clean water. In addition, the wet storage of bagasse using the H bleaching waste water without residual chlorine, the pulping properties was more stable than that of the wet storage using H bleaching waste water with residual chlorine. To the wetstorage with Ho bleaching waste water, the ideal treatment time was 16day.

Abstract: A new energy absorption device composed of the foam aluminum and steel plate is introduced here, which can prevent the structure by attenuating the over pressure of air-shockwave produced by a gas blast effectively. In order to find out the blast wave pressure attenuation property of a cladding aluminum foam layer and an aluminum foam sandwich layer, the theoretical and numerical methods were used to study them through comparative analyses. Two kinds of typical structures are simulated numerically, which are the structure with one layer of a steel plate and the structure with both a layer of the steel plate and the device respectively. The results of the simulation show that the multilayer composite structure has the excellent capacity to reduce the blast loading and attenuate the over pressure of air-shockwave. the aluminum foam sandwich layer have the ability to attenuate the blast pressure before compressed to solid, and the ability decreases after the aluminum foam was completely compressed. The simulation experimental environment can be established and reference data can be provided for the design of a life-saving ball system by using numerical analysis methods.

Abstract: In this study, we chose East China offshore areas as study region(N25°~41°，E117°~126°).According to the tectonic environments and characteristics of earthquake the seismotectonic units were established, taking Gaussian spatially smoothing only based on the input earthquake catalog, and fault-rupture-oriented elliptical smoothing to calculate the seismic activity rate in each cells. The maps for the distribution of horizontal peak ground acceleration with 10% probability of exceedance in 50 years were obtained through using the method of seismic hazard analysis based on cell source. While the total number of earthquakes unchanged, two-stage smoothing procedure deals with the error of epicenter location, contains the seismotectonic information in elliptical smoothing seismicity model. This method build up a simple and easy methodology of probabilistic seismic hazard analysis, especially for those place where not yet been clearly master the seismic tectonic information and with distributed Seismic activity.

Abstract: Herein, two models of long-span bridges, namely a suspension and a cable-stayed one, are developed at the numerical level in a commercial finite elements code, starting from original data, and they are used to simulate the structural response under wind excitation and seismic excitation. The main goal of this study consists in the evaluation of a control strategy, designed and proven effective for the wind action, considering the suspension bridge, or for the seismic action, for the cable-stayed one, when the bridge structure is subjected to the seismic and the wind action respectively.

Abstract: Submerged Floating Tunnels are a new type of infrastructure, still representing a challenge in structural engineering both from the theoretical and the practical point of view. In this paper some issues arisen in generating the seaquake input (transmission through water of the effects of the seabed seismic motion) for a 3D finite element analysis of Submerged Floating Tunnels are presented and discussed. This loading source has been pointed out buy preliminary analyses as an important additional hydrodynamic loading on the tunnel which can play a significant role, and thus deserves further investigations.