Low-pressure economizer increases fly ash collection efficiency in ESP

Li, Zhimin; Sun, Fengzhong; Ma, Lei; Wang, Wei; Li, Fēi

doi:10.1016/j.applthermaleng.2015.10.006

Cited by 32 publications

(17 citation statements)

References 18 publications

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“…It has been confirmed by many commercial power units in China that the application of an exhaust heat recovery process can result in multiple advantages for the power plant, such as coal savings, water savings, and dust emission removal. [20][21][22] Of this, the low-temperature economizer (LTE) process [23][24][25][26] is currently applied on a practical level. However, it is noted by several literatures [27][28][29] that the conventional bypass flue (CBF), which was originally implemented in a 1000-MW brown coal-fired unit at the Niederaussem power plant in Germany in the 1990s, 30 has an obvious superiority than the LTE, whether in thermal economy or in techno-economic performance.…”

Section: Introductionmentioning

confidence: 99%

Retracted: Techno-economic analysis of a novel hot-air recirculation process for exhaust heat recovery from a 600-MW hard coal-fired boiler

Wang

et al. 2018

Int J Energy Res

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The above article from the International Journal of Energy Research, published online on 5 March 2018 in Wiley Online Library (wileyonlinelibrary.com), has been retracted by agreement between the authors, the journal Editor in Chief and John Wiley & Sons Ltd. The retraction has been agreed due to major overlap with another published article: Ma Y, Wang Z, Lu J, Yang L. Techno‐economic analysis of a novel hot air recirculation process for exhaust heat recovery from a 600 MW brown‐coal‐fired boiler, Energy, 152, 2018, 348–357, 10.1016/j.energy.2018.03.176

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Section: Introductionmentioning

confidence: 99%

Retracted: Techno-economic analysis of a novel hot-air recirculation process for exhaust heat recovery from a 600-MW hard coal-fired boiler

Wang

et al. 2018

Int J Energy Res

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“…ESP's performance has been largely improved which was driven by the increasing stricter regulations on PM emission since 1990s. At present, the ESP removal efficiency for total PM has been enhanced to be more than 99% (Jiang et al, 2008;Xiong et al, 2015;Li et al, 2016). Likewise, its removal efficiency for PM 2.5 has been enhanced.…”

Section: Pm 25 Reduction By Technology Improvementmentioning

confidence: 98%

“…The GGH could decrease the temperature of flue gas before entering into the ESP to dew point temperature of SO 3 and HCl. The collection efficiency of ESP can be enhanced because of the enhancement of the conductivity of particles (Pudasainee et al, 2012;Xiong et al, 2015;Li et al, 2016).…”

Section: Pm 25 Reduction By Technology Improvementmentioning

confidence: 99%

PM2.5 Emission Reduction by Technical Improvement in a Typical Coal-Fired Power Plant in China

Jiang

et al. 2017

Aerosol Air Qual. Res.

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To investigate PM 2.5 reduction by technical improvement in typical Chinese coal-fired power plants, two units built in different time with different particulate matter (PM) control technologies but with the same coal-fired boiler type were selected to characterize the concentrations of PM 2.5 generated and emitted from coal-fired power plants. We found that significant benefit of PM 2.5 emission reduction was achieved by technological improvement. Due to the increase in the installed capacity and the application of low NO x burner alone, PM 2.5 emission factor without adopting other air pollution control devices decreased from 0.153 kg t -1 (the 100 MW unit) to 0.123 kg t -1 (the 300 MW unit). With the help of an improved electrostatic precipitator (ESP) of which removal efficiency increased from 76.4% to 97.5%, PM 2.5 emission factor further decreased from 0.014 kg t -1 (the unit with a normal ESP) to 0.003 kg t -1 (the unit with a cold-side ESP and a wet flue gas desulphurization (WFGD)). However, the application of flue gas denitrification and desulfurization devices may alter PM 2.5 compositions and their emissions. For instance, the installation of a WFGD was found to largely increase the emissions of water-soluble ions in PM 2.5 (e.g., SO 4 2-, Ca 2+ , and NH 4 + ).

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“…With the advent of new technologies, a recent study has shown that it is commercially viable to lower the flue gas exit temperature as low as 39°C–25°C, by reducing the sulfur and nitrogen contents . Furthermore, reduced flue gas temperature also increases the electrostatic precipitators efficiency to collect fly ash . Therefore, this option can prove commercially as well as environmentally beneficial and may be integrated with the current model for future studies to assess its impact at innate level.…”

Section: Modelmentioning

confidence: 99%

Comprehensive dynamic modeling, simulation, and validation for an industrial boiler incident investigation

Taimoor

Alghamdi

Farooqi

et al. 2019

Process Safety Progress

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Industrial boilers simulation can serve number of purposes like training, optimization, HAZOP studies, and incident investigation. Simulation including trip logics, interlockings, safety devices, start‐up and shutdown procedure is presented in this work. Simulation is directly accomplished in dynamic mode to benefit from the holdup approach to avoid anomalies because of recycling. The industrial DCS/PLC diagrams are replicated to imitate the boiler‐integrated behavior. Trip logics, start‐up and shutdown procedures are programmed using event scheduler. The inbuilt pressure relief module validates the simulated PSVs and rupture disc capacities. The model is then verified at three stages including ‘steady state’ achievement in dynamic mode, controller validation by start‐up and shut down procedures and finally by direct industrial data under deviant conditions. Where an unfortunate event is a concern, it also provides an opportunity to ponder and to evolve at various levels. Operational simulation of any such incident may help in getting a deep insight and thus to take accurate countermeasures. One such attempt is done in this work. A boiler accident has been reported. The complete response of the controllers and interlockings/trip system is imitated. The obtained results were compared with the chain of events that took place. © 2019 American Institute of Chemical Engineers Process Saf Prog: e12040 2019

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Low-pressure economizer increases fly ash collection efficiency in ESP

Cited by 32 publications

References 18 publications

Retracted: Techno-economic analysis of a novel hot-air recirculation process for exhaust heat recovery from a 600-MW hard coal-fired boiler

Retracted: Techno-economic analysis of a novel hot-air recirculation process for exhaust heat recovery from a 600-MW hard coal-fired boiler

PM2.5 Emission Reduction by Technical Improvement in a Typical Coal-Fired Power Plant in China

Comprehensive dynamic modeling, simulation, and validation for an industrial boiler incident investigation

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