Beijing Shenwu Environment and Energy Technology Corporation

Beijing, China

Beijing Shenwu Environment and Energy Technology Corporation

Beijing, China
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Wu D.,Beijing Shenwu Environment and Energy Technology Co. | Zhang A.,Beijing Shenwu Environment and Energy Technology Co. | Xiao L.,Beijing Shenwu Environment and Energy Technology Co. | Ba Y.,Beijing Shenwu Environment and Energy Technology Co. | And 2 more authors.
Energy Procedia | Year: 2017

An oxygen-free pyrolysis technique employing Shenwu rotating bed reactor with regenerative radiant tube as high temperature heat source was investigated to recycle municipal solid waste. To obtain the optimum condition of this technique, the effects of heating source temperature, arrangement and material thickness on ... were discussed, and the compositions and yields of products were studied experimentally. A three-dimensional transient mathematical model characterized with simultaneous fluid flow, heat and mass transfer was established to describe the pyrolysis process in a rotating bed reactor. The model was calibrated based on experimental data. Results show that this new technique has good commercial due to the possibility of avoiding the tar congestion problem effectively and obtaining clean gas with high caloricity. © 2017 The Authors.


Wu N.,Beijing University of Chemical Technology | Li B.,Beijing University of Chemical Technology | Ma W.,Beijing University of Chemical Technology | Ma W.,Beijing Shenwu Environment and Energy Technology Co. | Han C.,Beijing University of Chemical Technology
Microporous and Mesoporous Materials | Year: 2014

The lacunary polyoxometalate (LPOM) encapsulated into the hexagonal mesoporous silica matrix materials were successfully prepared via a directly synthesis method by adjusting pH of the preparation system from 2.0 to 6.0. The materials were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, N2 adsorption-desorption measurements, scanning electron microscopy, X-ray fluorescence analysis, and high-resolution transmission electron microscopy. The results show that the samples possess an ordered pore structure with which changed from uniform ribbing-type to cobweb shape cavity along with the LPOM content increasing from 0% to 30%. The materials possess a high specific surface area of 878-626 m2 g -1 and a mesopore diameter of about 3.8 nm. They also show an excellent catalytic performance and a good reusability for the esterification of n-butanol with acetic acid. © 2013 Elsevier Inc. All rights reserved.


Pei P.,Beijing Shenwu Environment and Energy Technology Corporation | Zhang K.,North China Electrical Power University | Xu G.,North China Electrical Power University | Yang Y.,North China Electrical Power University | Wen D.,Queen Mary, University of London
Particuology | Year: 2012

Under the Eulerian-Eulerian framework of simulating gas-solid two-phase flow, the accuracy of the hydrodynamic prediction is strongly affected by the selection of rheology of the particulate phase, for which a detailed assessment is still absent. Using a jetting fluidized bed as an example, this work investigates the influence of solid rheology on the hydrodynamic behavior by employing different particle-phase viscosity models. Both constant particle-phase viscosity model (CVM) with different viscosity values and a simple two-fluid model without particle-phase viscosity (NVM) are incorporated into the classical two-fluid model and compared with the experimental measurements. Qualitative and quantitative results show that the jet penetration depth, jet frequency and averaged bed pressure drop are not a strong function of the particle-phase viscosity. Compared to CVM, the NVM exhibits better predictions on the jet behaviors, which is more suitable for investigating the hydrodynamics of gas-solid fluidized bed with a central jet. © 2012 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.


Pei P.,China University of Petroleum - Beijing | Pei P.,Queen Mary, University of London | Pei P.,Beijing Shenwu Environment and Energy Technology Corporation | Zhang K.,China University of Petroleum - Beijing | And 2 more authors.
Powder Technology | Year: 2012

In the Eulerian-Eulerian approach for simulating gas-solid two-phase flow, a proper selection of an interfacial force to describe the momentum transfer between the two phases has a significant influence on the particle dynamics. Based on a detailed review of the inter-phase drag force models, a simple two-fluid model with zero particle-phase viscosity is used to investigate the effects of inter-phase drag force on the jet characteristics in a two-dimensional jetting fluidized bed. The simulation results from different inter-phase drag force models are compared with a designed experimental study. Both qualitative and quantitative results show that the jet behavior, including the distribution of solid volume fraction, bed pressure drop, jet penetration depth and jet frequency, could be significantly affected by the selection of drag force models. None of the models assessed in this work could predict all these parameters accurately. Some models can predict the averaged value well but are weak in predicting the dynamics and vice versa, which calls for a caution in interpreting data based on a single drag model. © 2011 Elsevier B.V.


Zhang K.,North China Electrical Power University | Pei P.,Beijing Shenwu Environment and Energy Technology Corporation | Brandani S.,University of Edinburgh | Chen H.,North China Electrical Power University | Yang Y.,North China Electrical Power University
Chemical Engineering Science | Year: 2012

A simple two-fluid model is validated by comparing single-jet fluidization experiments and numerical predictions. Subsequently, flow pattern and jet penetration depth are explored numerically in the bed with double jets under equal and unequal gas velocities. Glass balltoni with a density of 2550kg/m3 and a diameter of 275μm is employed as solid phase. The model used in this study considers the effect of the dispersed solid phase on both gas and particle momentum equations of the inviscid model A (Gidaspow, 1994). Numerical simulations are carried out in the platform of CFX 4.4, a commercial CFD code, together with user-defined FORTRAN subroutines. Both jet penetration depth and jet frequency predicted are in good quantitative agreement with measurements in an incipiently fluidized bed with a single jet. By combining solid volume fraction distribution and particle-phase velocity vector profile, three flow patterns (isolated, merged and transitional jets) are identified in the gas-fluidized bed with double jets, which depend more on the nozzle distance than the jet gas velocity. For the equal jet gas velocity, the jet penetration depth decreases with increasing nozzle distance in the merged-jet and transitional-jet regions, then reaches a minimum value in the transitional-jet region, and finally keeps steady in the isolated-jet region. For the unequal jet gas velocity, the merged jet penetration depth increases with increase in the velocity of one jet as the other jet gas velocity is fixed, whilst the jet penetration depths change a little in the transitional-jet region and remain a constant in the isolated-jet region. © 2011 Elsevier Ltd.


Qu Y.,China University of Mining and Technology | Chu M.,China University of Mining and Technology | Ding L.,Beijing Shenwu Environment and Energy Technology Co. | Zhang H.,China University of Mining and Technology | Wang F.,China University of Mining and Technology
Zhongguo Kuangye Daxue Xuebao/Journal of China University of Mining and Technology | Year: 2014

The heat fragmentation characteristics of lignite were studied in a fixed-bed and rotary kiln. The results show that the degree of fragmentation in the fixed-bed was increased with the increasing of temperature and feed size. The total fragmentation rate α of 20.43%-36.94% and pulverization rate β of 5.03%-9.24% were achieved for 6-13 mm feed at 400-700°C. When the feed size increased from 6-13 mm to 20-25 mm, α is increased from 25.03% to 80.63% and β is 4.35%-5.60%. The rotary rate is the main parameter for fragmentation in the rotary kiln. The α of 66.67%-78.41% and β of 10.26%-14.78% for 13-20 mm feed were achieved at 105-230°C and 5 r/min rotary rate. The degree of product fragmentation and pulverization are higher. When rotary rate increased from 3 r/min to 9 r/min, α increased from 57.63% to 75.82% and β is 11.05%-11.88%. Through the analysis on pore structure, volatile content and surface appearance of upgraded lignite, the key factors affecting fragmentation are as follows: the change of pore structure, water vapor behavior, volatile arising and heat processing parameters.


Chen L.,Beijing Shenwu Environment and Energy Technology Co | Xiao L.,Beijing Shenwu Environment and Energy Technology Co | Yang Y.,Beijing Shenwu Environment and Energy Technology Co | Wu D.,Beijing Shenwu Environment and Energy Technology Co
Physics Procedia | Year: 2015

Beijing Shenwu Group Corporation uses self-developed ceramic honeycomb as heat exchange cells instead of metal, with the advantages such as anti-corrosion, anti-erosion and anti-clogging, it can be used for air preheater and gas heater (GGH) in thermal power boiler island, to solving the problem of corrosion and plugging. Meanwhile, setting SCR catalyst in proper temperature region of ceramic honeycomb regenerator can save energy and reduce NOx. This air preheater can further reduce exhaust gas temperature, so as to improving boiler efficiency more than 3%, and achieving the goal of integration of energy conservation and emissions reduction ultimately. © 2015 The Authors. Published by Elsevier Ltd.


Wanli C.,Beijing Shenwu Environment and Energy Technology Co | Ning K.,Beijing Shenwu Environment and Energy Technology Co | Daohong W.,Beijing Shenwu Environment and Energy Technology Co
Physics Procedia | Year: 2015

The setting of furnace temperature in combustion system of reheating furnace at rolling mill is an important parameter in the production process. Variety of some factors such as furnace heating capacity, steel thermal stress, production rhythm etc. directly affects the setting of furnace temperature, it is an industry problem. This article analysis about how the above mentioned factors affect the furnace temperature setting, and mainly focus on dynamic setting strategy of furnace temperature so as to fit fluctuation of production rhythm through theoretical analysis on the energy balance of billet heat transfer in the furnace. This strategy has been verified by production and experiment, and matches with the related data.


Chen L.,Beijing Shenwu Environment and Energy Technology Co. | Xiao L.,Beijing Shenwu Environment and Energy Technology Co. | Yang Y.,Beijing Shenwu Environment and Energy Technology Co. | Wu D.,Beijing Shenwu Environment and Energy Technology Co.
Energy Procedia | Year: 2015

Beijing Shenwu Group Corporation uses self-developed ceramic honeycomb as heat exchange cells instead of metal, with the advantages such as anti-corrosion, anti-erosion and anti-clogging, it can be used for air preheater and gas heater (GGH) in thermal power boiler island, to solving the problem of corrosion and plugging. Meanwhile, setting SCR catalyst in proper temperature region of ceramic honeycomb regenerator can save energy and reduce NOx. This air preheater can further reduce exhaust gas temperature, so as to improving boiler efficiency more than 3%, and achieving the goal of integration of energy conservation and emissions reduction ultimately. © 2015 Published by Elsevier Ltd.


Wanli C.,Beijing Shenwu Environment and Energy Technology Co. | Ning K.,Beijing Shenwu Environment and Energy Technology Co. | Daohong W.,Beijing Shenwu Environment and Energy Technology Co.
Energy Procedia | Year: 2015

The setting of furnace temperature in combustion system of reheating furnace at rolling mill is an important parameter in the production process. Variety of some factors such as furnace heating capacity, steel thermal stress, production rhythm etc. directly affects the setting of furnace temperature, it is an industry problem. This article analysis about how the above mentioned factors affect the furnace temperature setting, and mainly focus on dynamic setting strategy of furnace temperature so as to fit fluctuation of production rhythm through theoretical analysis on the energy balance of billet heat transfer in the furnace. This strategy has been verified by production and experiment, and matches with the related data.

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