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Zhangjiakou, China

Li S.,Hebei Institute of Architecture and Civil Engineering | Zhao L.,Design Institute
2011 International Conference on Electric Technology and Civil Engineering, ICETCE 2011 - Proceedings

In order to solve the environmental pollution caused by oil-containing wastewater and fly ash, application of fly ash as sorbent, added after modification and combined with other process in the treatment of oil-containing wastewater was summarized. The results show that application of fly ash in oil-containing wastewater treatment has the characteristic of simple in process, good effect and lower operation cost. And this process has expansive application foreground. The problems remained were pointed out. Further research on the mechanism of wastewater treatment with fly ash, separation and final utilization of the saturated fly ash are needed to do in the near future. © 2011 IEEE. Source

Li S.,Hebei Institute of Architecture and Civil Engineering | Zhao L.,Design Institute
2011 International Conference on Electric Technology and Civil Engineering, ICETCE 2011 - Proceedings

Combining with wastewater treatment technology, the structure and working principle of automatic control system were explained. Application of automatic control system in flux control system, bar control system, water pump control system, sand sedimention tank control system, aeration control system and sludge control system of wastewater treatment process are introduced. The necessity, feasibility and social benefit of automatic control system on wastewater treatment plant are expliend. And the researches needed to do in the future are also prospected © 2011 IEEE. Source

Deng Q.,Wuhan University | Zhu D.,Southwest Petroleum University | Zhao D.,Petrochina | Wang H.,Design Institute
Electronic Journal of Geotechnical Engineering

Washout and damage by flood have become to be one of the main geological disasters to endanger the safety of long distance oil and gas pipelines in our country,and the reasons are manifold, but the unreasonable flood-control standard in the design phase of protection engineering has played an important role in inducing the disaster. The paper takes Zhong County-Wuhan City gas pipeline crossing Langping River as an example, and discusses the optimal design flood standard. Based on the characteristics of all previous washout and damage by flood, and some structural parameters and the corresponding estimated investment of protection engineering are calculated in different design flood frequency such as 10%, 5%, 2% and 1%, and then the reasonable flood-control standard are proposed to be 2% by the comprehensive comparison of effect and investment of the different protection engineering under different flood frequency. This result not only has the guiding significance for gas pipeline protection crossing the Lang Ping River, but also has a great reference value for the pipeline protection crossing the other rives. © 2014, EJGE. Source

Li A.,Xian University of Architecture and Technology | Qin E.,Xian University of Architecture and Technology | Qin E.,Wuhan Design Engineering Co. | Xin B.,Xian University of Architecture and Technology | And 2 more authors.
Energy Conversion and Management

Hohhot hydropower station is being built from the year of 2007. There are many complicated heating facilities and equipment in the powerhouse, such as electricity generators and transformer. The air distribution of the powerhouse is affected by the complex heat sources. In this paper the model size is 1/50 of the real scale and 2D-PIV is used to study the air distribution in the model of large underground space. The supply outlet is located on the roof and the heat source is located on the floor. The different supply air conditions and heat release rate are discussed. Three air supply are discussed: v/v0 = 0.75, v/v0 = 1, v/v0 = 1.25 (v0 is designed air supply speed, v0 = 0.94 m/s). And we also carry out three heat release rates: Q/Q0 = 0.75, Q/Q0 = 1, Q/Q0 = 1.25 (Q0 is designed heat release rate, Q0 = 7.12 W). The results show that the supply air velocity has a remarkable effect on air distribution characteristics of the large space and occupant zone velocity. However, it is also observed that the heat release rate has little effect on air distribution of large space and occupant zone velocity. The air supply velocity and the air inlet location should be paid more attention in designing air distribution. The experimental findings are useful for optimizing the design of air distribution in a large space with complex heat sources. © 2009 Elsevier Ltd. All rights reserved. Source

He X.,Design Institute | Lu G.,Central South University
Journal of Earthquake Engineering and Engineering Vibration

Phase velocity and group velocity are major parametes for the study of the propagation characteristics for seismic wave in anisotropic media and these are very important for interpretation of seismic data. Started from Christoffel equation, the calculation formula for phase velocity,group velocity,polarization vector and slowness surface of VIT are derived and it' s relation with the anisotropic parameters are discussed through numerical calculation. The relations of phase velocity and group velocity to cracks trend of TTI , HTI are studied. Using of the characteristics of phase velocity for cracks trend measuring are discussed. Source

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