Shenhua Guoneng Energy Group Corporation Ltd

Beijing, China

Shenhua Guoneng Energy Group Corporation Ltd

Beijing, China
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Xiao C.,Shenhua Guohua Electrical Power Co. | Wang S.,Shenhua Guoneng Energy Group Co. | Han P.,Shenhua Guoneng Energy Group Co.
Gaodianya Jishu/High Voltage Engineering | Year: 2017

The electrostatic precipitator (ESP) upgrading is highly demanded for ultra-low emission from coal-fired flue gas. The particle emission can only be controlled by increasing ESP length or height under the guide of revised Deutsch Equation, traditionally. However, by adopting ESP index, the product of average, peak electrical strength, and specific collection area, particle emission can also be reduced by increasing operating voltage and current. The final dust emission can be limited under 10 mg/m3 by a series of upgrading steps: replacement of single-phase power source by three-phase power source, flue gas cooling under 110℃, mixed rapping with side-rapping for front-side fields and top-rapping for end-side fields, integration of desulfurization devices and ESPs, etc. Besides, replacement of fabric filter by ESP can prevent the clogging of filters and limit the visible near-stack plumes and acid aerosol mists while reducing particle emission. © 2017, High Voltage Engineering Editorial Department of CEPRI. All right reserved.

Ning Z.,Zhejiang University | Podlinski J.,Szewalski Institute of Fluid Flow Machinery | Shen X.,Zhejiang University | Li S.,Zhejiang University | And 3 more authors.
Journal of Electrostatics | Year: 2016

Wide Electrostatic Precipitator (having plate-to-plate spacing 400 mm or more) is one of a promising ways to improve existing ESPs, yet its large-scale application has been limited because of potential collection efficiency reduction. This article focus on study the electrohydrodynamic flow inside the ESP and the particle collection efficiency by using Particle Image Velocimetry and Electrical Low Pressure Impactor respectively when several different electrode geometries were applied, in order to increase wide ESP efficiency. Results showed that geometry with juxtaposed high voltage wires provided best performance of the wide ESP (both in collection efficiency and running cost) among our tests. © 2016 Elsevier B.V.

Zhang Y.,Shenhua Guoneng Energy Group Corporation Ltd | Wang N.L.,North China Electrical Power University
Applied Mechanics and Materials | Year: 2014

Energy-saving management is playing increasingly important parts in the energy conservation of thermal power generation. The economic performance indexes were decomposed and clarified to set a delicacy energy-saving management system. With the great volume of operation data, an fuzzy rough set (FRS) –based big data analytics were introduced to build the intelligent energy-saving decision-making model. Based on such energy-saving management system, the operation optimization practice was performed on a 600MW thermal power unit to determine the optimum working state under specific operation conditions. The result shows that the proposed energy-saving management can makes great guidelines for the operation optimization and energy-saving diagnosis of thermal power units. © 2014 Trans Tech Publications, Switzerland.

Huang Y.,Zhejiang University | Huang S.,Zhejiang University | Zheng Q.,Zhejiang University | Shen X.,Zhejiang University | And 4 more authors.
International Journal of Plasma Environmental Science and Technology | Year: 2015

Electrostatic precipitation (ESP) is a common technology applied in fly ash control in coal-fired power plant over the world, due to its high efficiency, low pressure loss, and low maintenance cost. Since fine particle collection (PM2.5) is much harder than relative large particle, modern ESP requires excellent performance on PM2.5 collection. In this paper, not only the ESP principles and models, but also the modern techniques developed recently for ESP in PM2.5 control will be reviewed, such as electric agglomeration, flow field visualization, modern power source, moving electrode ESP and colder-side ESP. The newly developed ESP index model and its application in ESP sizing and upgrading will be introduced in detail. Besides, several advanced flue gas cleaning systems developed in the past twenty years will be presented and compared, especially for the system with colder-side ESP developed in the recent ESP upgrading activities in China.

Yan K.,Zhejiang University | Li S.,Zhejiang University | Feng W.,Zhejiang University | Zheng Q.,Zhejiang University | And 11 more authors.
Gaodianya Jishu/High Voltage Engineering | Year: 2015

High-voltage (HV) discharges induce high-intensity electrical field that generates large quantities of electrons and radicals. Hence they are employed to control and remove pollutants. In this paper, we introduce several environmental applications of high-voltage discharge, such as removal of SO2, NOx, particles, VOCs and pollutants in water, ozone generation, sterilization and collection of micro-organism. For desulfuration and denitration using streamer corona discharges, heterogeneous oxidation of S(IV) is quicker than homogeneous oxidation, and increasing AC/DC, pulse power and energy density is the key for improving the removal efficiency. Electrostatic precipitator (ESP) has been developed for a long time, yet its improvement is impeded due to the inadequate development of device design and power technology, and reentrainment. Using ESP index instead of Deutsch Equation to guide ESP sizing and power optimization is conducive to improve ESP efficiency. When using HV discharge to produce ozone, the emphasis is on short-pulse power supply, additives and cooling. HV discharge is also employed to treat VOCs and waste water in various structures. The former one usually combines discharge with catalysis, while the latter includes discharge under or over liquid surface. However, both of them need to be improved in energy efficiency. HV discharge could deactivate micro-organism through radicals, UV or electrical field, yet it could also be used to collect micro-organisms while keeping their high activities. Nevertheless for environmental applications, the non-thermal plasma technology needs further development in pilot demonstration and integrated process. ©, 2015, Science Press. All right reserved.

Shen X.-J.,Zhejiang University | Shen X.-J.,Shenyang University of Technology | Wang S.-L.,Shenhua Guoneng Energy Group Co. | Han P.,Shenhua Guoneng Energy Group Co. | And 3 more authors.
Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) | Year: 2015

In order to investigate the influence of gas flow field on fine particles precipitation of electrostatic pricipitator (ESP), submicron particle movement inside an ESP was measured by using two-dimensional Particle Image Velocimetry (2D-PIV) technique. Moxa-moxibustion smoke was used as the tracer for the experiments. The wire-plate type ESP had gap distance of 200 mm. Experiments were performed with changing the high-voltage wires or corona discharge polarities. For a single high-voltage wire ESP and at the applied voltage of 50 kV, four generated vortexes around the wire are usually observed. For the ESP with double corona wires, more vortexes are produced due to their interaction. The four vortexes become much more symmetrical in between the two corona wires. Positive or negative corona discharges give similar vortexes in terms of their shapes. They are also similar each other when using wire or spike type electrodes. The particle velocity, however, can be significantly increased when using the double spike electrode due to its larger discharge power. The observed maximum velocity is about 1.6 m/s, which is almost three times of the primary gaseous velocity. ©, 2015, Zhejiang University. All right reserved.

Zhang Y.,Shenhua Guoneng Energy Group Corporation Ltd | Fu P.,North China Electrical Power University | Wang N.L.,North China Electrical Power University
Advanced Materials Research | Year: 2014

The in-depth energy conservation of thermal power units is confronting new challenges under the varying operation conditions and ambient constraints. Compared with traditional optimal values, the description of energy-consumption benchmark state was proposed to describe the economic performance of thermal power units with the varying operation boundary, operation conditions and equipment performance. The energy consumption interactions of units were divided into 4 parts: parameters, equipment, subsystems and units. The models for energy-consumption benchmark states were established with the fuel specific consumption(FSC) setting as the optimization objective. Such a method was performed on a 600MW supercritical power unit and the results show that the energy-consumption benchmark state, which is related with the varying boundary, can reflect the boundary condition, operation lever and equipment performance. It makes significant reference for the energy-saving diagnosis and operation optimization of thermal power units under overall working conditions. © (2014) Trans Tech Publications, Switzerland.

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