Fuel interchangeability for lean premixed combustion in cylindrical radiant burner operated in the internal combustion mode

Maznoy, Anatoly; Pichugin, N.; Yakovlev, Igor; Fursenko, Roman; Petrov, Dmitri; Shy, S.S.

doi:10.1016/j.applthermaleng.2020.115997

Cited by 24 publications

(4 citation statements)

References 57 publications

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“…Therefore, at the Department of Thermal Power Plants of the Non-profit joint-stock Company "Almaty University of Energy and Communications named after Gumarbek Daukeev", research is actively ongoing to develop new designs of hot water and steam boilers, mechanical furnace and burner devices with high efficiency, to reduce both specific fuel consumption and harmful emissions. For small and medium-sized coal-fired boiler houses, bed burning is typical (Kang and Ding, 2020; Maznoy et al, 2020). According to estimates, for a layered combustion process, there are significant opportunities to intensify the combustion of solid fuels (Ermakov, 2005;Kamenetsky, 2010).…”

Section: Problem Statementmentioning

confidence: 99%

Research of Combustion Modes During Layer-Burning of Shubarkul Coal on the Fire Grate With the Hand Furnace of the KSVR-0.43 Hot Water Boiler

Orumbayev¹,

Kibarin²,

Bakhtiyar³

et al. 2020

PTQ

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Experience shows that the trend towards using solid fuels in the energy sector of Kazakhstan will be implemented for a rather long time. At the same time, the global trend is currently tightening environmental requirements. They set the task to continue improving coal combustion efficiency and minimize emissions of harmful substances and greenhouse gases into the atmosphere. This article aims to conduct complex thermal engineering tests of the KCVr-0.43 hot water boiler. For this, the following measurement and control tools were used: the standard boiler room secondary devices, an industrial gas analyzer Testo-350, a control (reading) module Testo-454 with temperature probes and a Pitot tube, a soot number meter Testo-308, a temperature meter 2TPM1, a portable liquid flow meter Vzlet-PRC and a stopwatch. All they had valid verification and calibration certificates. An analysis of the gas composition and technical parameters of the KCVr-0.43 hot water boiler in the investigated operation mode with Shubarkul coal during a long-term test showed that it seems possible to operate boilers of this series under low load conditions without boosting air and fuel. They can reduce emissions of toxic NOx and greenhouse gases CO2 into the atmosphere. In this case, burning Shubarkul coal without forcing through the air is characterized by significant carbon monoxide CO emissions. The formed nitrogen oxides NOx decompose in reactions with CO with the formation of molecular nitrogen and oxygen. Burning, coke residue in the layer, coal-burning stages, emissions of harmful substances.

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Section: Problem Statementmentioning

confidence: 99%

Research of Combustion Modes During Layer-Burning of Shubarkul Coal on the Fire Grate With the Hand Furnace of the KSVR-0.43 Hot Water Boiler

Orumbayev¹,

Kibarin²,

Bakhtiyar³

et al. 2020

PTQ

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“…Most recently, the PMC technology has been studied using low‐power burners (up to 400 kW/m 2 ), gaining interest among researchers. Maznoy et al (2021) investigated the potential for fuel interchangeability in an innovative annular cylindrical burner made of an intermetallic solid. For all fuels under study, within the combustion power ranges of 260–420 kW/m 2 and equivalence ratios of 0.70–0.95, the burner operated in stable radiant conditions with radiation efficiency up to 45%, NO x emissions of 10–50 ppm, and CO emissions in the range of 0–40 ppm.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of the use of a radiant porous burner in a novel dual hot air generator based on the food drying process

Hernández,

Arriagada,

Saavedra

et al. 2024

J Food Process Engineering

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Hot air generators are essential for food drying processes, operating in either indirect or direct modes. In this study, a high‐power radiant porous burner in a novel dual hot air generator (HAG‐D) was designed and experimentally investigated. Temperatures and emissions of the combustion process are reported for 9, 13, and 18 kW, and 20% and 40% of excess air. Indirect and direct modes were tested across airflow rates of 300–1100 m3/h to assess thermal efficiency. For indirect mode operation, 88% thermal efficiency is the highest value for 9 kW, 20% excess air, with an airflow of 890 m3/h observing air temperature difference (outlet minus inlet) of approximately 30°C. Furthermore, CO and NOx emissions were found in the range of 0–30 ppm and 20–45 ppm, respectively. For direct mode operation, results showed that for 18 kW with 20% and 40% excess air, the maximum thermal efficiency was 82% with an airflow of 670–1040 m3/h and air temperature difference in the range of 50–80°C. Results confirm that the radiant heat transfer mechanism allows for higher efficiencies and less pollution in a wide range of powers in the HAG‐D unit. The direct mode is recommended for food drying processes due to low exposure to flue gases, and the indirect mode is for other industrial applications due to its high efficiency. Future studies are suggested to assess renewable fuels, such as liquefied petroleum gas or natural gas and hydrogen mixtures, toward energy transition.Practical applicationsThe potential applications or practical benefits of the develop of this novel dual hot air generator is in the food industry, particularly in drying process of fruits and vegetables. Also, air conditioning, and space heating (household use) processes stand out among their several applications to generate hot air, such as paint, and wood.

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“…It was found that it is possible to add only a small amount of syngas (up to 10% of thermal share) before reaching the burner limit. Furthermore, interchangeability between natural gas and other renewable gases was studied by Maznoy et al [16]. The research was mainly focused on stability limits, radiation efficiency, and CO/NO x emissions, which were studied during the experiments.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Inert Fuel Compounds on Flame Characteristics

et al. 2021

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To describe the effects of inert compounds in gaseous fuel, experiments on three different process burners (staged fuel burner, staged air burner, and low-calorific burner) were carried out. The tested burners are commercially available, but they were specially designed for experimental usage. Tests were carried out in the semi-industrial burner testing facility to investigate the influence of inert gases on the flame characteristics, emissions, and heat flux to the combustion chamber wall. Natural gas was used as a reference fuel, and, during all tests, thermal power of 500 kW was maintained. To simulate the combustion of alternative fuels with lower LHV, N2 and CO2 were used as diluents. The inert gas in the hydrocarbon fuel at certain conditions can lower NOx emissions (up to 80%) and increase heat flux (up to 5%). Once incombustible compounds are present in the fuel, the higher amount of fuel flowing through nozzles affects the flow in the combustion chamber by increasing the Reynolds number. This can change the flame pattern and temperature field, and it can be both positive and negative, depending on actual conditions.

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Fuel interchangeability for lean premixed combustion in cylindrical radiant burner operated in the internal combustion mode

Cited by 24 publications

References 57 publications

Research of Combustion Modes During Layer-Burning of Shubarkul Coal on the Fire Grate With the Hand Furnace of the KSVR-0.43 Hot Water Boiler

Research of Combustion Modes During Layer-Burning of Shubarkul Coal on the Fire Grate With the Hand Furnace of the KSVR-0.43 Hot Water Boiler

Experimental investigation of the use of a radiant porous burner in a novel dual hot air generator based on the food drying process

The Effect of Inert Fuel Compounds on Flame Characteristics

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