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Wu J.,Shanghai University of Electric Power | Zhang J.,Shanghai University of Electric Power | Xu W.,Shanghai Waigaoqiao Power Generation Co. | Cai Y.,Shanghai Waigaoqiao Power Generation Co. | And 4 more authors.
Advanced Materials Research

Along with the rapid development of electric power industry in China, the pollutant discharge limits are getting more strict, and WFGD (wet flue gas desulfurization) technology and its equipment have been greatly developed and extensively applied, in which the gas-gas heater (GGH) is adopted at lots of the power stations. The corrosion is a very important issue in GGH, and it is experimentally studied in this paper. Through experiment of polarization curves and the control variable method, a comparative analysis of the corrosion resistance between the commonly used materials of the GGH is made. The results have shown that the corrosion resistance with the heat transfer surface in GGH will decrease with the temperature increasing, but the enamel steel's corrosion resistance and stability is strikingly better than that of others, and the increasing volume of corrosion resistance by plating enamel is remarkable. © (2012) Trans Tech Publications, Switzerland. Source

Ye Z.-L.,Chinese Institute of Urban Environment | Xie X.,General Water of Xiamen Sewage Co. | Dai L.,General Water of Xiamen Sewage Co. | Wang Z.,Shanghai Waigaoqiao Power Generation Co. | And 5 more authors.
Waste Management

Fresh leachate, generated in municipal solid waste incineration (MSWI) plants, contains various pollutants with extremely high strength organics, which usually requires expensive and complex treatment processes. This study investigated the feasibility of blending treatment of MSWI leachate with municipal wastewater. Fresh MSWI leachate was pretreated by coagulation-flocculation with FeCl3 2g/L and CaO 25g/L, plate-and-frame filter press, followed by ammonia stripping at pH above 12. After that, blending treatment was carried out in a full-scale municipal wastewater treatment plant (WWTP) for approximately 3months. Different operational modes consisting of different pretreated leachate and methanol addition levels were tested, and their performances were evaluated. Results showed that throughout the experimental period, monitored parameters in the WWTP effluent, including COD (<60mg/L), BOD5 (<20mg/L), ammonium (<8mg/L), phosphorus (<1.5mg/L) and heavy metals, generally complied with the Chinese sewage discharged standard. Under the experimental conditions, a certain amount of methanol was needed to fulfill TN removal. An estimation of the operation cost revealed that the expenditure of blending treatment was much lower than the total costs of respective treatment of MSWI leachate and municipal wastewater. The outcomes indicated that blending treatment could not only improve the treatability of the MSWI leachate, but also reduce the treatment cost of the two different wastewaters. © 2014 Elsevier Ltd. Source

Cai Y.,Shanghai Waigaoqiao Power Generation Co. | Xu W.,Shanghai Waigaoqiao Power Generation Co. | Wu J.,Shanghai University of Electric Power | Zhu K.,Fudan University | And 3 more authors.
Advanced Materials Research

Under mild thermal condition, mercury releasing characteristics and its morphological features transformation of fly ash sample, which is obtained from the exit of air pre-heater of one power plant in eastern China, has been studied in the paper. The experiment shows that under mild thermal condition, the temperature range of fly ash mercury releasing is about 200 °C ∼ 800 °C. It reaches the first peak at about 300 °C and it reaches the second peak at about 600°C. Moreover, most sample elemental mercury is Hg 0. The fly ash sample in which mercury emissions and unburned carbon content have no obvious relationship. © (2012) Trans Tech Publications, Switzerland. Source

Shi J.-Y.,Shanghai Power Equipment Research Institute | Shi J.,Shanghai Waigaoqiao Power Generation Co. | Yang Y.,Shanghai Power Equipment Research Institute | Xu J.-Q.,Shanghai Waigaoqiao Power Generation Co. | And 3 more authors.
Dongli Gongcheng Xuebao/Journal of Chinese Society of Power Engineering

A life management system has been designed for 4 × 300 MW coal-fired power generation units, which includes a hardware system and a software block. The hardware system is made up of torsional vibration monitoring devices, database servers, web page servers, application servers, user browsers and so on, while the software block composed of 11 modules for life calculation of five main components such as the steam turbine, boiler and generator etc. The main purpose of the life management system is to realize on-line monitoring, database management, real-time calculation of residual life as well as corresponding result page display and browsing. Actual application of the life management system to the power units in Shanghai Waigaoqiao Power Generation Co., Ltd. demonstrates that the system can simultaneously serve 4 × 300 MW coal-fired power generation units in the aspect of operation control, maintenance optimization and residual life calculation of dozens of important components. Source

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