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Yu H.,Shenyang University of Technology | Chen S.,Shenyang University of Technology | Jiang Y.,Liaoning Institute of Energy Resources | Jin S.,Shenyang University of Technology | Bai Q.,Shenyang University of Technology
Materials Research Innovations | Year: 2014

Based on the thermal damage experiment in a laboratory, the damage variation versus temperature is analysed. A thermal damage model is established, which can be used to calculate damage field and stress field of concrete dam with damage character considered. The damage counter lines for 50 years during the operation period are given. The results show that the maximum of damage and the maximum of thermal stress were at the same place, where was the dam downstream surface. So, the dam downstream surface may crack easily. © 2014 W. S. Maney & Son Ltd.

Yi K.,China Criminal Police College | Cao Y.,Liaoning Institute of Energy Resources | Li J.,China Criminal Police College | Xu Z.,China Criminal Police College | And 2 more authors.
Chemistry Bulletin / Huaxue Tongbao | Year: 2014

The determination of 5-Hydroxymethylfurfural (5-HMF) in soy has been carried out by derivative spectrophotometry. 5-HMF reacted with 2-thiobarbituric acid in strong acid medium, and then was determined at the wavelength of 414 nm. The analytical results indicated that the method is high accuracy, and good precision and sensitivity. The linear range was 0.5-4 μg/mL with correlation coefficient of 0.9995. The method can satisfy the requirement of quantitative determination in food security area.

Yu M.,Liaoning Institute of Energy Resources | Gu S.,ShenYang Agricultural University | Yu Y.,Yingkou Environmental Assessment Ltd. | Dong Y.,The Geological Society of Liaoning Province | And 3 more authors.
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | Year: 2016

The wet anaerobic fermentation technology generates a large amount of biogas slurry. Biogas slurry treatment is the bottleneck of anaerobic fermentation technology development. In addition, according to past experience and theoretical calculation, maintaining an adequate liquid anaerobic fermentation temperature consumes about 30% of the system capacity. In winter, it even reaches 45% in the northern cold regions. This limits the anaerobic fermentation technology development greatly in northern cold region. The dry anaerobic fermentation technology, on the other hand, does not produce biogas slurry, and its residue is easy to be processed into the organic fertilizer. The level of the moisture content of China municipal waste is especially suitable for dry anaerobic digestion. However, the dry fermentation technology is relatively new, and the system control is more difficult than liquid fermentation. From that perspective, research on development of anaerobic dry fermentation devices is the key for the success of the technology. The features of designed vertical continuous dry fermentation equipment include stir heat up adjustment tank, multipoint distribution feed, vertical anaerobic fermentation tank and slurry reflux mixing process. Altogether, the fermentation system can process high volume of solid organic waste and produce biogas. The vertical continuous dry fermentation equipment mainly included the stir heat up regulating tank, feed pump, vertical anaerobic fermentation tank and discharge pump. A reflux inlet and fresh organic waste material inlet at the top of stir heat up regulating tank were set up, the bottom of stir heat up regulating tank was connected to the vertical anaerobic fermentation tank through the feed pump. An air outlet at the top of fermentation tank was set up which was connected to the gas pipeline. The discharge port on the bottom, the biogas slurry and residue that outflowed from discharge port was divided into two paths by discharging pump and first adjust the control valve. One path was connected to reflux inlet of stir heat up regulating tank, the other was the residue export connected to the discharge piping. We expected that such design could realize a quick start for biogas generation without stirring and heating in anaerobic reactor, and without adding water consumption during the process. We also expected that such device could save energy, reduce the volume of biogas slurry residue, protect the environment, and reduce the cost. The top of the vertical anaerobic fermentation tank using multipoint feeding distribution way facilitated more uniform distribution of fermentation raw materials. The internal temperature in the fermentation tank without stirring and heating device was maintained by continuous in and out of the hot materials. We used the reactor to conduct fermentation experiment to study the effect of slurry reflux and gas characteristics by comparing with a control group. The VFA (volatile fatty acid) content of application reflux was reduced, and the VFA content was minimum by reflux ratio of 1:7. When C/N ratio was close to 25:1, there was no ammonia nitrogen accumulation and gas production was the best. The high reflux ratio of 1:8-1:9 appeared to have a certain extent accumulation of VFA content. The flux ratio at 1:9 was the highest for generating biogas slurry quantity, and the VFA accumulation phenomenon was the most obvious, which reached 7822.4 mg/L. At the same time, high ammonia concentration inhibited biogas production. In conclusion, with a high clinker backflow, the anaerobic fermentation system would be suppressed. The slurry reflux had no significant influence in methane content. © 2016, Chinese Society of Agricultural Engineering. All right reserved.

Li X.,Liaoning Institute of Energy Resources | Liu J.,Liaoning Institute of Energy Resources | Zheng L.,Liaoning Institute of Energy Resources | Li M.,Liaoning Institute of Energy Resources | And 4 more authors.
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | Year: 2015

The pilot scale experiment of oxygen-rich sawdust gasification in a bubbling fluidized bed was carried out. The influence of the different aperture ratio of air distribution plate, particle size of bed material, height of bed material, minimum fluidization velocity and gasification medium on gasification result was studied. The results show that the wind distribution effect of the air distribution plate with aperture of Φ 2 mm and 0.5% aperture ratio is better; the fluidization effect with particle size of bed material of 0.18-0.25 mm quartz sand and height of bed material of 140 mm is more ideal; the minimum fluidization velocity is influenced by the bed material size and heating rate. The preliminary test measurement shows that the calorific value is 9.6 MJ/m3 when oxygen concentration is 50%. ©, 2015, Taiyangneng Xuebao/Acta Energiae Solaris Sinica. All right reserved.

Liu J.,Liaoning Institute of Energy Resources | Wang G.,Liaoning Institute of Energy Resources | Li X.,Liaoning Institute of Energy Resources | Meng F.,ShenYang Agricultural University | Zhang D.,Liaoning Institute of Energy Resources
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | Year: 2013

The pilot scale experiment on wood oxygen rich gasification in a down draft gasifier was carried out. The influence of the different gasified medium and oxygen concentration and temperature of gasification was studied. The reason of the gas heat value rise when the oxygen rich gasification was used and influence factors of CO2 gas from the gasification. The result showed that the gas heat value presented the trend of rise along with the increase of oxygen rich concentration at least double for the air gasification. The CO, H2 increased obviously, however the gasheat value do not rise as the oxygen rich concentration exceed 90%; The contents of CO2 was influence by oxygen concentration and ER; The effect of ER on gasification temperature and gas heat value; And conclude the proper temperature of gasification were 1100°C, in view of material characteristic and limit of equipment material.

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