Efficiency and power upgrade by an additional high pressure economizer installation at an aged 620 MWe lignite-fired power plant

Stevanović, Vladimir D.; Wala, Tadeusz; Muszynski, Slawomir; Milic, Milos; Jovanovic, Milorad

doi:10.1016/j.energy.2014.01.001

Cited by 39 publications

(14 citation statements)

References 12 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Journal of Energy Research, published online on 5 March 2018 in Wiley Online Library (wileyonlinelibrary.com), has been retracted by agreement between the authors, the journal Editor in Chief and John Wiley & Sons Ltd.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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“…where, E u , E h , and E r are the unit efficiency, heat efficiency, and waste heat recovery efficiency of the unit, respectively, Q FAH is the heat obtained by air in FAH (kJ), Q LPE is the heat obtained by water in LPE (kJ), Q HPE is the heat obtained by water in HPE (kJ), Q g is the heat supplied by the flue gas from the hot air stove (kJ), W wp , W op , and W f are the work done by water pumps, oil pump and fans per unit time, respectively, in kJ. In Equations (12)- (15), Q FAH , Q AP , Q LPE , Q HPE , and Q g can be calculated by Equation (16), W wp , W op , and W f can be calculated by Equation 17:…”

Section: Unit Efficiency and Heat Efficiency Of The Experiments Unitmentioning

confidence: 99%

“…Yang [14] used an equivalent heat drop method to analyze the waste heat use effect of fluorinated plastic LTEs. A high pressure economizer (HPE) set behind the AP was used to heat the boiler feed water [15]. In recent years, many flue gas waste heat deep use technologies have been conceived and applied on some large-scale coal-fired units.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Operation Regulation of a Coupled High–Low Energy Flue Gas Waste Heat Recovery System Based on Exhaust Gas Temperature Control

Liu

Sun

2019

Energies

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Controlling the exhaust gas temperature (EGT) of coal–fired boilers at a reasonable value is beneficial to ensuring unit efficiency and preventing acid corrosion and fouling of tail heating surfaces in power plants. To obtain the operation regulation of coupled high–low energy flue gas waste heat recovery system (CWHRS) under a given EGT, experimental equipment was designed and built. Experiments were carried out to maintain the exhaust gas temperature under different flue gas flow, flue gas temperature and air temperature conditions. As the flue gas flows, the flue gas temperatures and air temperatures increased, and the bypass flue gas flow proportions or the water flows of the additional economizer were increased to maintain the EGT at about 85 °C. An improved low temperature economizer (LTE) and front located air heater (FAH) system were put forward. As the flow of the crossover pipe increased, the EGT and the inlet water temperature of the LTE increased. As the flow of the circulating loop increased, the EGT and the inlet water temperature of the LTE decreased. Operation regulations of LTE–FAH system under four cases were given. The operation regulations of CWHRS and LTE–FAH system can provide references for power plant operation.

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“…Contrary to the partial water flow design presented by Stevenovic et al . , all of the feed water is passed through the economizer except that supplied to the attemperators (≈3% of total load, maximum).…”

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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Efficiency and power upgrade by an additional high pressure economizer installation at an aged 620 MWe lignite-fired power plant

Cited by 39 publications

References 12 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

Experimental Study on Operation Regulation of a Coupled High–Low Energy Flue Gas Waste Heat Recovery System Based on Exhaust Gas Temperature Control

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

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