Time filter

Source Type

Chen W.,Wuhan University of Science and Technology | Huang Y.,Wuhan University of Science and Technology | Yuan S.,Wuhuan Engineering Co.
Chinese Journal of Environmental Engineering | Year: 2017

The sewage treatment plant in an industrial park in northwestern Hubei mainly treated chemical synthetic pharmaceutical wastewater, using a reaction-precipitation/hydrolytic acidification/MBR combined process. The pretreatment used was ineffective and the requirements of the subsequent MBR process were not met; therefore, the final treated water quality did not conform to the national emission standards. Consequently, the original process needed to be upgraded. The characteristics of the wastewater of this sewage treatment plant include a complex pollutant composition, high load impact, poor biodegradability, and rapid changes in water amount and quality. Therefore, an iron-carbon micro-electrolysis process was employed as an enhanced pre-treatment process and a combined process of two-stage pretreatment/MBR was established to simulate the original technology in pilot tests. The experimental results indicated that when the iron-carbon dosage was 400 g·L-1, the iron-carbon mass ratio was 4:5, HRT was 3 h, the pH value was 4, and the aeration amount was 3 L·min-1. In such conditions, the primary pre-treatment effect was satisfactory, that is, the removal rate of micro-electrolysis for COD was 47.42%, and the biodegradability of the wastewater increased from 0.23 to 0.38. The secondary pre-treatment increased the wastewater biodegradability from 0.38 to 0.46, which could improve the operating result of the subsequent process significantly. In addition, the quality of the final treated water conformed to the national standard, namely, Discharge Standards of Water Pollutants for Pharmaceutical Industry Chemical Synthesis Products Category (GB 21904-2008). © 2017, Science Press. All right reserved.

Zhuang Q.,Kellogg Brown and Root | Biondi M.,Kellogg Brown and Root | Yan S.,Kellogg Brown and Root | Bhagat K.,Kellogg Brown and Root | And 6 more authors.
Fuel | Year: 2015

This paper presents the results of a recent low rank coal 850 MW class IGCC ("Integrated Gasification Combined Cycle") feasibility study for the 50 Hz market. The study aimed to position the Transport Integrated Gasification ("TRIG™") technology for power generation in the China market where coal gasification has been widely practiced. It assumed a mine mouth project in eastern Inner Mongolia, China and used a low rank coal from the area. Results from the study indicate that the low rank coal TRIG™ IGCC is more efficient and with a superior environmental performance and less water usage than the best available conventional ultra-supercritical ("USC") technology in the China market. With environmental regulation compliance costs increasing in China, the low rank coal TRIG™ IGCC will become competitive as one of the viable clean coal technologies for power generation. Converting the large reserve of low cost and low heating value coals located in remote areas to electricity for the coastal areas will certainly help these areas manage the increasing pressure for further reductions in emissions from coal firing power plants. The paper also provides an update on Southern Company's Kemper IGCC project in the USA that includes CO2 capture and is currently in its final stage of construction. © 2014 Elsevier Ltd. All rights reserved.

Wang H.,Wuhan University of Technology | Wang G.,Wuhuan Engineering Co. | Wu S.,Wuhan University of Technology
Sustainable Construction Materials 2012 - Proceedings of the 2nd International Conference on Sustainable Construction Materials - Design, Performance, and Application | Year: 2013

The study is focused on the fatigue life prediction of Road System of Thermal Energy Collector and Release (RSTECR) using the finite element method. The pavement structure was modeled as two-dimensional, four-layer stratum using ANSYS finite element soft. The maximum tensile strain or stress of asphalt layers was calculated in order to predict the fatigue life of the system. Especially, the different load position and installed tube's direction were considered. The results show that no matter where the traffic direction is vertical or parallel to the installed tube's direction, the tube must not be installed in the top layer. The most adverse load position is that the single wheel is upon the installed tube when the load direction is parallel to traffic direction. And the most adverse load position is that two wheels are upon the installed tube when the load direction is vertical to traffic direction. Finally, the simulating method of the system was put forward and the study is expected to be able to provide road engineers with some design basis. © 2013 American Society of Civil Engineering.

Xu B.,Wuhan University | Xu B.,Central Southern China Electric Power Design Institute | Hou J.-G.,Wuhan University | An X.-W.,Wuhan University | Lu Y.-Z.,Wuhuan Engineering Co.
Shuili Xuebao/Journal of Hydraulic Engineering | Year: 2012

In order to set the appropriate safety level for hydropower stations penstocks in the revision of DL/T 5141-2001, several representative penstocks codes of hydropower stations and pressure vessel standards in China and foreign countries were selected, and their different design methods and corresponding safety levels were analyzed and compared. The results show that: (1) the safety level of code DL/T 5141-2001 is appropriate, but for exposed penstocks, the safety level are higher and could be reduced; (2) the safety level of underground penstock could be increased a little. Based on the mechanical characteristics of the exposed and underground penstocks and the serious results if they were damaged, four projects as reference were proposed for the revision of code.

Han F.,Wuhan University of Science and Technology | Han F.,Hubei Province Key Laboratory of Systems Science in Metallurgical Process | Zhong D.-W.,Wuhan University of Science and Technology | Zhong D.-W.,Hubei Province Key Laboratory of Systems Science in Metallurgical Process | Wang J.,Wuhuan Engineering Co.
Zhendong yu Chongji/Journal of Vibration and Shock | Year: 2012

It was proved from the probabilistic perspective that Bayes criterion function method based on maximum entropy principle is in accordance with the regularization method solving ill-posed problems. A new method based on information fusion and Bayes theory for model modification was established. Samples were designed with tests and the second-order response surface was adopted as the fast operation model easily modified and perfected by fully use of prior information (design code information, finite element calculation information and test information). This method could be extended to large and complicated nonlinear structures for its good computational efficiency and solution convergence. The underground powerhouse of a pumped-storage power station was employed to verify the effectiveness of the proposed method.

Jin B.,Hunan University | Jin B.,Wuhuan Engineering Co. | Huo J.,Hunan University
Jianzhu Cailiao Xuebao/Journal of Building Materials | Year: 2016

The variation of residual compressive strength of C30 calcareous aggregate concrete after elevated temperature was studied. Microscopic investigation on hardened cement paste(HCP) which had the same water to cement ratio and the same process methods of heating and cooling with the concrete, was conducted by thermogravimetric(TG) analysis, scanning electron microscopy(SEM) test and mercury intrusion porosimetry(MIP) test. The results indicate that the secondary hydration effect of HCP at medium and low temperatures(100300℃) has significant influence on the residual compressive strength of calcareous aggregate concrete at correspondent temperature interval. Meanwhile, the residual compressive strength of calcareous aggregate concrete has a good inverse correlation with the porosity of HCP after elevated temperature. © 2016, Editorial Department of Journal of Building Materials. All right reserved.

Wang K.,Zhengzhou University | Dong X.,Henan Institute of Science and Technology | Xu W.,Wuhuan Engineering Co. | Liu Z.,Zhengzhou University | Liu M.,Zhengzhou University
Huagong Xuebao/CIESC Journal | Year: 2016

The issue of heat transfer enhancement is analyzed for the widely existed problem of the low heat transfer coefficient of laminar convective heat transfer in tubes. A new type of tube with variable cross-section is introduced under the directions of the heat transfer enhancement principles. Models of new tubes with variable cross-section under different parameters and general round tube are established. With large CFD analysis software FLUENT, and the influence on laminar convective heat transfer in tubes of new variable cross-section heat exchange tubes are investigated. Results show that the new tubes with variable cross-section could markedly enhance the laminar convective heat transfer of the tube side with less additional increase of flow resistance, and has a better synthetic performance of heat transfer enhancement. Within the scope of this study, Nu and η of new heat tubes both increase with the decrease of L1/di or L2/di, and η of new heat tubes is greater than 2.22. The results provide a certain guidance and theoretical basis for the enhancement of laminar convective heat transfer in tubes. © All Right Reserved.

Zhang Y.,China University of Petroleum - Beijing | Wang H.,Wuhuan Engineering Corporation | Chen L.,China University of Petroleum - Beijing | Lu C.,China University of Petroleum - Beijing
Industrial and Engineering Chemistry Research | Year: 2012

Particle segregation was systematically studied in a binary fluidized bed of inner diameter 0.286 m with fine FCC and coarse millet particles as flotsam and jetsam, respectively. Segregation efficiencies of both flotsam and jetsam, axial and radial fraction profiles were studied and analyzed systematically. A new developed horizontal baffle was examined to see its effects on particles segregation. Experimental results showed that the baffle-free bed could only get high-purity flotsam particles at very low gas velocities. However, both nearly pure jetsam and flotsam particles were obtainable at much higher gas velocities after four layers of new baffle are installed. A wider operating range suitable for particle segregation and greater axial fraction gradients were found in the baffled bed, further proving the baffle's effect on promoting particle segregation. This enables the baffled bed to be a promising continuous particle classifier in industry. Further analysis demonstrated that reduced bubble size, improve bubble flow distribution, and suppressed solid mixing are the intrinsic causes. © 2012 American Chemical Society.

Zhao G.-C.,Wuhuan Engineering Corporation | Li Z.-Y.,Wuhuan Engineering Corporation
Xiandai Huagong/Modern Chemical Industry | Year: 2015

The harm of the impurities in propylene such as water, sulfur, O2, CO, CO2, arsenic, phosphorus and unsaturated hydrocarbon is highly focused. The purification methods of propylene are also described. The basis of selecting purification method and the factors needed to be considered in the design process of purification system are analyzed as well. ©, 2015, China National Chemical Information Center. All right reserved.

Li S.,Sinopec | Zhang D.,Wuhuan Engineering Co.
Shiyou Huagong/Petrochemical Technology | Year: 2015

Aimed at excessive propane contents in the carbonylation reactor and off-gas of butanol and octanol unit in the Second Chemical Fertilizer Plant of Sinopec Qilu branch, several influencing factors, namely the propylene oxo synthesis process, mass concentration of rhodiumtriphenylphosphine complex catalyst, propane content in propylene feedstock, H2/CO volume ratio in feedstock syngas and reaction temperature, were investigated. It was found that, the excessive propane contents could be reduced by increasing the propylene purity in feedstock, adjusting the volume ratio of H2/CO in feedstock syngas, controlling the mass concentration of the rhodiumtriphenylphosphine complex catalyst and stabilizing the reaction temperature. The propane emission from the oxo synthesis system off-gas was reduced to 0.897 t/h and the consumption of propylene for producing per ton butyraldehyde was decreased from 0.645 t/t to 0.615 t/t under the optimized conditions of rhodium catalyst concentration at 415-585 mg/kg, triphenylphosphine concentration 87.8-119.6 g/kg, propylene purity in feedstock 99.60% (φ), H2/CO volume ratio in feedstock syngas 1.015-1.029 and reaction temperature 82-120℃. © 2015, Beijing Research Institute of Chemical Industry. All right reserved.

Loading Wuhuan Engineering Corporation collaborators
Loading Wuhuan Engineering Corporation collaborators