Advanced Materials Research Vols. 424-425

Abstract: The current development of concrete structure tends to mass concrete structure and superhigh concrete structure. But construction quality for ultrahigh concrete structure is difficult to be controlled due to its disadvantages such as large volume, high strength, complicated structure and difficult construction etc. This paper elaborates the key construction technique of concrete filled steel tube composite column and concrete structure applied in ultrahigh concrete structure—Wanxin Building in Shenyang, China, which can provide a useful reference for construction quality control of relevant concrete projects.

Abstract: The performances of two species of biomass reburning processes and the effect of operating parameters on NO_X removal efficiency were studied using the reburning boiler burner simulator facility. The results of the study show that there is an optimal range of denitrification for direct reburning condition in reburning reaction temperature, the stoichiometric ratio(SR),the reburning ratio, article size of biomass, the concentration of NO_X in the main combustion zone. The smaller the particle size of biomass, NO_X removal effect is more obvious. The best biomass denitration temperature range is 950-1050 °C and the stoichiometric ratio has a best value in different experimental conditions. When reburning ratio is in the range of 10% -15%, the particle size has greater impact on the rate of denitrification. It is beneficial for NO_X removal when NO_X concentration in the main combustion zone is greater than 200ppm.

Abstract: Combustion of sawdust was studied using Pyris-1TGA thermogravimetric apparatus in the heating rates of 20, 40, 60K/min. The combustion process of sawdust includes three steps: losing water, precipitation and combustion of volatile, and carburization. A bicomponent parallel reaction model is created and used to simulate the combustion process of sawdust under the heating rate of 40K/min. Comparison of simulation and experimental results shows that the fitting curves are in good agreement with the experimental results

Abstract: Based on the theory of acoustic measurement of gas temperature and the ideal temperature field distribution in boiler, a new algorithm for reconstructing temperature field taking into account the compensation of sound wave refraction is proposed. According to engineering software MATLAB, computer simulation of the reconstruction algorithm can be done, and the three dimensional display and the isothermal contour can be produced. Finally, the simulated temperature field is compared with the ideal one, and the error is analyzed. It is proved that the reconstruction algorithm is accurate and feasible.

Abstract: A monitoring instrument of environment condition is described in this paper, which uses the LPC2368 as the controller. The acquisition of environmental condition is realized by using SHT11, which is a digital temperature and humidity sensor. A DS1302 is used as the real time reference clock device, and the time message is displayed on the LCD together with the environment temperature and humidity. As if the temperature or humidity is beyond the setting range, the alarm light and sound will be switched on to inform the manager. At the same time, the alarm message could be sent out to other monitor center by RS485 interface. Experimental results show that the temperature and humidity monitor features small, reliable performance, small error, and be suitable to a wide range.

Abstract: The powdered expanded graphite (EG) was used as a porous adsorbent for the removal of the cationic dye, methylene blue (MB), from aqueous solution. The dye adsorption experiments were carried out with the bath procedure. Adsorption isotherms at different temperatures were determined and modeled with Langmuir and Freundlich equations. Thermodynamic parameters were calculated and correlated with the adsorption behaviors. The effects of solution pH on the adsorption were also studied.

Abstract: China is the largest developing country with the annual growth rate of 9.8% and the second largest energy consumption, greenhouse gas emissions and CO2 emissions in the world. Wind energy helps decreasing import dependency, diversifying sources of production, and contributes to a sustainable development in many countries. This article explores the importance of global wind turbine development in 2010. And then introduced the use of wind power annual development condition and the distribution characteristics of wind resources in China. Finally the existing problems were pointed out in the wind power industry of China, and have a guiding significance for the development of the future of China's wind power career.

Abstract: Fenton reagent was selected as oxidizers for the oxidation and degradation of cafeteria wastewater. The treatment effects were evaluated by the changes of COD and BOD5 parameters. The effects of Fenton reagent ratio, dosage of FeSO4•7H2O and pH value on wastewater treatment under normal temperature and pressure were investigated, the oxidation regularity is initially discovered as well. Orthogonal experiments were designed to optimize the processing conditions based on the single affected factor. The optimized controlling conditions for Fenton reagent treatment process is FeSO4•7H2O=1mmol/L, pH=3, H2O2/Fe2+=3.5:1, reaction time=60min. With Fenton reagent treatment the COD removal ratio was raised up to 94%. Compared with biological process, it saved land occupation and was more suitable for regions which lacked of land space.

Abstract: KMnO4 was selected as oxidizers for the oxidation and degradation of cafeteria wastewater. The treatment effects were evaluated by the changes of COD and BOD5 parameters. Orthogonal experiments were designed to optimize the processing conditions based on the single affected factor. The optimized controlling conditions for KMnO4 treatment process were KMnO4=0.3 mmol/L, pH=2, reaction time=60 minutes respectively. The COD removal ratios using KMnO4, ClO2, Fenton reagent treatment were 26%, 55% and 82% respectively. It showed that of Fenton was highest. But after its oxidation, it created other refractory substance and the produced sludge was also difficult to settle down. When using ClO2, the pH in process is closer to neutral, thus saved large quantity of acid. The treatment using KMnO4 showed there was little refractory precipitation, but its COD removal was too low.

Abstract: According to the normal regulation and procedure of cleaner production, pre-clean audit is carried out in a pharmaceutical factory. After establishing an audit group, propagandas and mobilizations were conducted and investigations on site were performed. Twenty pieces of no or low cost solutions which involved control optimization, waste material recycling, renewal and maintenance of equipment, and enhancement of staff performance and management, et al. were propounded and adopted in the processes. As a result, some economic benefits were attained and the discharge capacity of waste water was reduced. Moreover, the key audit units and problems to be solved were clarified. This pre-audit work laid a sound foundation for the next audit stage in this factory.