An experimental and modeling study of ash deposition behaviour for co-firing peat with lignite

Shao, Yuanyuan; Wang, Jinsheng; Xu, Chunbao; Zhu, Jesse; Preto, Fernando; Tourigny, Guy; Badour, Chadi; Li, Hanning

doi:10.1016/j.apenergy.2011.02.006

Cited by 31 publications

(10 citation statements)

References 17 publications

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“…The main cause of slag formation during gasification or combustion is the large amount of minerals of alkaline-earth and alkali metals that are produced [23][24][25]. Recently, some indexes for predicting slagging tendency during coal gasification have been proposed on the basis of ash characteristics [26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Understanding mineral behaviors during anthracite fluidized-bed gasification based on slag characteristics

Huang

et al. 2014

Applied Energy

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Section: Introductionmentioning

confidence: 99%

Understanding mineral behaviors during anthracite fluidized-bed gasification based on slag characteristics

Huang

et al. 2014

Applied Energy

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“…The surface temperatures of deposition probe can thus be monitored or controlled to some extent via adjusting the flow rate of cooling air depending on flue gas temperature and the probe properties (i.e., size, metal conductivity). In most of deposit-related studies, the surface temperature of ash deposition probes was controlled at the steam-tube metal temperature in boilers, typically at 430-600 °C [10,12,30,31,[42][43][44][45]. On the other hand, ash deposit sampling was performed at the superheater zone in a small boiler furnace or multiple locations in a large scale unit using the air-cooled deposition probes.…”

Section: Ash Deposition Monitoring and Analysis Of Ash Depositsmentioning

confidence: 99%

Ash Deposition in Biomass Combustion or Co-Firing for Power/Heat Generation

et al. 2012

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This paper presents a concise overview of ash deposition in combustion or co-firing of biomass (woody biomass, agricultural residues, peat, etc.) with other fuels for power/heat generation. In this article, the following five research aspects on biomass combustion ash deposition are reviewed and discussed: influence of biomass fuel characteristics, deposit-related challenges, ash deposition monitoring and analysis of ash deposits, mechanisms and chemistry of fly ash deposition, and key technologies for reducing ash deposition and corrosion in biomass-involved combustion.

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“…A number of researches, including co-firing [2][3] and pre-drying, have been 4 undertaken to use lignite efficiently for electricity generation, which are also in the requirements of environmental protection. Lignite pre-drying is considered as a potential way [4] .…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Analysis on a Lignite-Fired Power System Integrated with a Steam Dryer: Investigation on Energy Supply System of the Dryer

et al. 2015

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Lignite is becoming a competitive fuel for power generation with high security of supply and a low price. But a power plant firing lignite directly always has some weaknesses, including low thermal efficiency and high construction investment. That pre-drying lignite before feeding it to the boiler is a potential method to tackle these weaknesses, and low pressure steam extracted from steam turbines is considered as a competitive heat source for the drying process. In a lignite-fired power system integrated with steam dryer, the steam extraction is led to the dryer via connection pipe and depressurization valve directly. To obtain a stable drying temperature in a variable load of power plant, the steam extraction is often used by the dryer after depressurization, which indeed causes exergy loss. To reduce the exergy loss, the steam extraction was proposed to be supplied to the dryer via compressor or ejector. The thermodynamic models were developed to calculate the net efficiency of power system with different energy supply system of the dryer. The energy saving boundary, that the net efficiency of power system could be increased in some ranges of drying temperature by some energy supply system of dryer, Downloaded by [New York University] at 05:02 08 June 2015 2 was gained. Furthermore, the exergy efficiencies were calculated to get the essential of the results obtained. NOMENCLATURE Abbreviation CLPS Conventional Lignite-fired Power System PLPS Pre-dried Lignite-fired Power System PLPSC Pre-dried Lignite-fired Power System that steam energy supplied to the dryer via Compressor PLPSD Pre-dried Lignite-fired Power System that steam energy supplied to the dryer Directly PLPSE Pre-dried Lignite-fired Power System that steam energy supplied to the dryer via Ejector THA Turbine Heat Acceptance condition NHV Net Heating Value Symbols h enthalpy, kJ/kg p pressure, MPa t d the drying temperature, defined as the heat source temperature (saturated temperature of low pressure steam) of the dryer, °C Downloaded by [New York University] at 05:02 08 June 2015 3 E exergy, kJ/kg P electrical power, kW W mechanical power, kW δ relative variation ζ ap station service power consumption rate, %.η cs isentropic efficiency of compressor, % η ex exergy efficiency, % η sg gross efficiency of power system, % η sn net efficiency of power system, % λ pre-drying degree, i.e., the moisture mass pre-dried out of 1 kg raw lignite, kg/kg ω entrainment ratio of the ejector, °C

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An experimental and modeling study of ash deposition behaviour for co-firing peat with lignite

Cited by 31 publications

References 17 publications

Understanding mineral behaviors during anthracite fluidized-bed gasification based on slag characteristics

Understanding mineral behaviors during anthracite fluidized-bed gasification based on slag characteristics

Ash Deposition in Biomass Combustion or Co-Firing for Power/Heat Generation

Thermodynamic Analysis on a Lignite-Fired Power System Integrated with a Steam Dryer: Investigation on Energy Supply System of the Dryer

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